USTC IonQNet Group

High optical access (HOA) trap

2026-10-03T00:00:00+08:00

Four directions of high-NA optical access

Our high-optical-access apparatus (Review of Scientific Instruments, 2021) places a miniaturized blade-electrode ion trap in an all-glass cell, opening optical paths for tightly focused control beams and fluorescence collection. The geometry supports high-numerical-aperture objectives from four directions. These objectives provide multi-directional addressing, ion imaging and quantum-state readout, allowing the optical system to be configured around the needs of each experiment.

From precise addressing to new quantum gates

The HOA platform supports our research on ion control with tightly focused light and optical tweezers. We used its optical access to develop low-crosstalk dual-sided Raman addressing, then used the optical Magnus effect to implement addressed entangling gates with single-sided polarization-gradient control. Together with in-situ aberration correction using an ion probe, high-quality focused fields allow us to select individual qubits and couple to axial motion along an ion chain.

Optical control of the crystal’s motional spectrum

The open optical geometry also allows local optical-tweezer potentials to be combined with electrical confinement. We have demonstrated optical control of an ion’s vibrational frequency and are investigating how local light fields can dynamically reshape the frequencies and spatial structure of phonon modes in a crystal. This approach aims to reduce crosstalk from unwanted motional modes and provide additional control for high-fidelity gates directly within ion crystals.

Explore our trapped-ion quantum computing research →

Optical-tweezer ion gates

2026-10-03T00:00:00+08:00

Addressed gates with the optical Magnus effect

Tightly focused light provides more than a small addressing spot: its spatially varying polarization offers a new way to couple an ion’s spin to its motion. Using the optical Magnus effect, we implemented addressed entangling gates driven by co-propagating Raman light through a single objective. This geometry simplifies the optical interface while retaining flexible selection of the ions involved in the gate.

The work was reported in Physical Review Letters 135, 260604 (2025). After correcting for state-preparation and measurement errors, the measured Bell-state fidelities were 98.7(1)% in a two-ion chain and 97.2(4)% in a four-ion chain.

From precise addressing to phonon control

We combine single-sided polarization-gradient control with in-situ aberration correction and coupling to axial motional modes. Optical tweezers also provide local potentials for tuning ion motion; building on demonstrated control of an ion’s vibrational frequency, we are developing ways to reshape phonon modes within ion crystals and reduce unwanted motional crosstalk.

Explore the trapped-ion quantum computing research →

See the high optical access (HOA) trap →

高通光离子阱（HOA trap）

2026-10-03T00:00:00+08:00

四个方向的高数值孔径光学接口

我们研制的高通光离子阱装置（Review of Scientific Instruments，2021）将小型化的刀片离子阱放入全玻璃腔体中，为紧聚焦操控光束和荧光收集提供开放的光学通道。该结构能够支持四个方向的大数值孔径物镜，分别承担多方向光学寻址、离子成像与量子态读出等任务，使光学系统可以围绕实验需要灵活配置。

从精确寻址到新型量子门

HOA 平台服务于紧聚焦光场与光镊操控离子的研究。我们利用多方向光学接口发展了双侧低串扰拉曼寻址，随后通过光学 Magnus 效应，将可寻址纠缠门简化为单侧偏振梯度操控。结合以离子为探针的原位像差校正，高质量聚焦光场能够在离子阵列中选择目标比特，并耦合沿离子链方向的轴向运动模式。

用光镊调控离子晶体的运动谱

开放的光学接口也使光镊势能够与电学囚禁相结合。我们已演示光镊对离子振动频率的调控，并进一步研究通过局域光场动态改变晶体的声子频率与模式分布，降低非目标运动模式引起的串扰，为直接在离子晶体中实施高保真量子门提供更多控制自由度。

进一步了解离子阱量子计算节点 →

光镊离子门

2026-10-03T00:00:00+08:00

利用光学 Magnus 效应构造可寻址量子门

紧聚焦光场不仅能形成精细的寻址光斑，其空间偏振梯度也为离子的自旋与运动耦合提供了新的途径。我们利用光学 Magnus 效应，实现由同向传播的拉曼光驱动的可寻址纠缠门：操控光从离子阱一侧入射，经同一物镜聚焦，在简化光学接口的同时，保留对目标离子的灵活选择能力。

这项工作发表于 Physical Review Letters 135, 260604（2025）。经态制备与测量误差校正后，两离子链和四离子链中的 Bell 态保真度分别为 98.7(1)% 和 97.2(4)%。

从精确寻址走向声子调控

我们将单侧偏振梯度操控与原位像差校正、轴向运动模式耦合相结合，发展低串扰、灵活的离子门技术。光镊形成的局域势还可以调节离子的运动：在已演示的离子振动频率调控基础上，我们进一步研究动态重塑离子晶体中的声子模式，降低非目标运动模式引起的串扰。

进一步了解离子阱量子计算节点 →

查看高通光离子阱（HOA trap）装置相册 →

Yun-Feng Huang

2026-04-01T10:00:00+08:00

Profile

Yun-Feng Huang is a Researcher in the Department of Optics and Optical Engineering at the University of Science and Technology of China. His research interests include quantum communication, photonic quantum information processing, and trapped-ion quantum information processing.

Education

1998-2003, Ph.D. program, Department of Physics, University of Science and Technology of China
1994-1998, B.S., Department of Physics, University of Science and Technology of China

Experience

2009-present, Researcher, Department of Optics and Optical Engineering, University of Science and Technology of China
2006-2008, Associate Professor, Department of Physics, University of Science and Technology of China
2003-2005, Lecturer, Department of Physics, University of Science and Technology of China

Research

Current work focuses on building quantum networks based on trapped-ion systems, including enhanced trapped-ion nodes, photonic quantum channels and hybrid quantum networks. His group has carried out experimental studies with Yb and Ba ions confined in linear ion traps.

Chen-Xu Wang

2026-03-31T20:20:00+08:00

Education

2021.9-now, University of Science and Technology of China, Department of Optics and Optical Engineering, Doctor
2017.8-2021.6, Ocean University of China, Faculty of Information Science and Engineering, Bachelor

Research

Quantum information with trapped ions. Quantum simulation, quantum network, distributed quantum computation.

Quantum Interface Concept

2026-03-28T10:23:00+08:00

Quantum interfaces connect stationary matter qubits to photons that carry quantum information between remote nodes. In our research, trapped ions provide coherent local processing, while cavity interfaces and frequency conversion connect those processors to optical channels and other quantum systems.

Explore our quantum-network research →

量子接口概念

2026-03-28T10:23:00+08:00

量子接口将静止的物质量子比特与光子相连接，让量子信息能够在远距离节点之间传递。在我们的研究中，离子阱承担相干的本地量子操控，微腔接口和量子频率转换则将离子处理器接入光学信道，并连接其他物理体系。

了解我们的量子网络研究 →

Hybrid Quantum Network

2026-03-28T10:21:00+08:00

Trapped ions provide long-lived coherence and high-fidelity quantum operations, while solid-state memories store photonic quantum states. We develop interfaces that combine these capabilities in a hybrid network, connecting local ion control with remote optical storage.

Our polarization-preserving frequency converter bridges the 369.5 nm emission of a ytterbium ion and the 580 nm transition of a europium-doped crystal memory. A Sagnac loop stabilizes the polarization components, and off-axis parabolic mirrors provide achromatic coupling across the wavelength bands (Chinese Optics Letters, 2026). The two figures show the network architecture and the experimental system linking the ion node, frequency converter and memory.

Working with Professor Zong-Quan Zhou’s team, we established ion–memory entanglement between laboratories separated by 75 m and connected by 90 m of optical fiber. Joint measurements after storage and retrieval verify quantum correlations across this heterogeneous link. The experiment is reported in the preprint Heterogeneous entanglement between a trapped ion and a solid-state quantum memory (arXiv:2603.05836), with further details in Chen-Xu Wang’s doctoral thesis (2026). We plan to extend these interfaces to neutral-atom systems and explore distributed quantum computing across physical platforms.

Explore our hybrid quantum network research →

混合量子网络

2026-03-28T10:21:00+08:00

离子阱提供长相干时间和高保真量子操控，固态量子存储器则存储光量子态。我们发展连接这两类体系的量子接口，让离子节点的本地操控与远端光学存储协同工作，构建混合量子网络。

保偏频率转换接口将镱离子的 369.5 nm 光子转换到铕掺杂晶体存储器的 580 nm 波段。Sagnac 环稳定偏振分量间的相对相位，离轴抛物面镜提供跨波段消色差耦合（Chinese Optics Letters，2026）。上方两幅图分别展示网络架构，以及连接离子节点、频率转换模块和存储器的实验系统。

我们与周宗权教授团队合作，在相距 75 m、通过 90 m 光纤连接的两个实验室间实现离子—存储器纠缠，并通过存储和读出后的联合测量验证异构链路中的量子关联。相关成果见预印本 Heterogeneous entanglement between a trapped ion and a solid-state quantum memory（arXiv:2603.05836），实验细节亦收录于王晨旭博士学位论文（2026）。未来，我们还将开发离子与中性原子系统的接口，探索跨物理体系的协同分布式量子计算。

进一步了解混合量子网络研究 →

Cavity QED Interface

2026-03-28T10:20:00+08:00

We integrate fiber microcavities with needle ion traps to develop ion–photon interfaces for quantum networks. The small cavity mode volume enhances ion–cavity coupling, while the fibers provide channels for collecting and transmitting photons. By designing the mirrors, trapping geometry and optical coupling together, we aim to build network nodes that combine high bandwidth with high efficiency.

The photographs show the hardware behind this interface. Gold coating on the fiber sides and the outer regions of the end faces provides electrical shielding while leaving the central optical apertures open. Two opposing fiber mirrors form a microcavity, which is integrated with the needle trap inside the vacuum chamber. The fluorescence image of a single Ba⁺ ion between the mirrors shows the ion confined within this cavity geometry.

Explore quantum networking with cavity QED →

腔 QED 接口

2026-03-28T10:20:00+08:00

我们将光纤微腔与针状离子阱集成，构建面向量子网络的离子—光子接口。微腔的小模体积增强离子与腔场的耦合，光纤则提供光子的收集与传输通道。通过协同设计腔镜、囚禁结构与光学耦合，我们致力于构建兼具高带宽与高效率的量子网络节点。

这组照片展示了接口的实物装置。光纤腔镜的侧面及端面外围镀金，在保留中央光学孔径的同时提供电学屏蔽；两面腔镜相向组装成微腔，再与针状离子阱集成并安装于真空腔体内。腔镜之间单个 Ba⁺ 离子的荧光图像，展示了这一腔结构中的单离子囚禁。

进一步了解腔 QED 量子网络 →

"Transverse Polarization Gradient Entangling Gates for Trapped-Ion Quantum Computation" is published in Physical Review Letters

2025-12-25T10:00:00+08:00

Our work “Transverse Polarization Gradient Entangling Gates for Trapped-Ion Quantum Computation” has been published in Physical Review Letters as an Editors’ Suggestion on December 24, 2025.

We realized high-fidelity entangling gates for trapped ions based on the polarization gradient of tightly focused light. This scheme simplifies the current entangling gate configuration and is compatible with the optical tweezer architecture, holding great significance for large-scale trapped-ion quantum computation.

Background and Challenge

Trapped-ion quantum systems, with their ultra-high operation fidelity and coherence, are one of the leading physical platforms for building large-scale quantum computers. Ion-array-based quantum computing architectures, which construct quantum processors through optically addressing individual ion qubits in parallel, offer the advantages of high connectivity and parallel computational efficiency. However, scaling up this architecture faces a fundamental challenge: dense phonon modes in large ion arrays cause gate crosstalk, making it difficult to implement high-fidelity entangling gates directly. In recent years, the international community has proposed using tightly focused optical tweezer arrays to reshape the ion phonon spectrum and suppress crosstalk, but demonstrating optical tweezer gates in optically addressed ion-trap quantum computers has not yet achieved a breakthrough.

The Optical Magnus Effect Approach

Building on years of innovative research and independent development in trapped-ion quantum computation, our team has realized a novel entangling gate scheme based on the optical Magnus effect: analogous to the Magnus effect in fluid dynamics, a spinning ion in a focused light stream (optical tweezer) experiences a transverse force — perpendicular to the light propagation direction. This scheme exploits the transverse field gradient of a tightly focused laser to create a state-dependent push that establishes quantum entanglement between ions. This approach eliminates the traditional complex counter-propagating laser beam configuration, greatly simplifying the experimental setup and reducing operational complexity.

Key Results

After correcting for state-preparation and measurement errors, we measured Bell-state fidelities of 98.7(1)% in a two-ion chain and 97.2(4)% in a four-ion chain of ¹⁷¹Yb⁺ ions. This quantum gate is capable of achieving fidelities above 99.99% in theory. We analyzed and discussed the main sources of infidelity in the current experiment, and expect to reduce the gate error by more than an order of magnitude in future experiments.

Fig. 1. Principle of polarization-gradient-based individual addressing. An acousto-optic deflector (AOD) generates multiple laser spots through a high-NA objective lens, producing polarization gradients that enable spin-dependent forces on individual ions.

Significance

The key innovation of this technique lies in its excellent compatibility with optical tweezer gates — since the tweezer operation itself involves transverse motion — and the significant simplification of optical configurations, making the optical tweezer gate scheme highly feasible in experiment. This provides a simpler and more flexible path toward large-scale, scalable trapped-ion quantum computation.

Reviewers gave high praise: “This paper demonstrates a successful combination of optical tweezers with linear ion chains, proposing an ingenious and powerful mechanism through which two-qubit gate operations can be realized between arbitrary ion pairs…” and “The results of realizing this type of quantum gate are encouraging, and this method addresses an important challenge in scaling up ion-trap quantum computation…”

Find the article here: https://doi.org/10.1103/w5l6-wmrl

See also the report by Photon Box (光子盒): https://news.qq.com/rain/a/20251225A06IAR00

(Source: China Science Daily, by Min Wang)

横向偏振梯度离子纠缠门成果发表于 Physical Review Letters，并获编辑推荐

2025-12-25T10:00:00+08:00

我们的工作“Transverse Polarization Gradient Entangling Gates for Trapped-Ion Quantum Computation”于 2025 年 12 月 24 日发表于 Physical Review Letters，并获选为编辑推荐（Editors’ Suggestion）。

我们利用紧聚焦光场的偏振梯度实现了高保真囚禁离子纠缠门。这一方案简化了现有纠缠门的光路配置，并与光镊架构兼容，为大规模离子阱量子计算提供了新的技术路径。

研究背景与挑战

离子阱量子系统具有很高的操作保真度和相干性，是构建大规模量子计算机的主要物理平台之一。基于离子阵列的量子计算架构通过光学寻址，并行操控各个离子量子比特，具有高连接度和并行计算效率。然而，这一架构的扩展面临一个关键挑战：大离子阵列中密集的声子模式会引起量子门串扰，使高保真纠缠门难以直接实现。近年来，研究者提出利用紧聚焦光镊阵列重塑离子的声子谱并抑制串扰，但在光学寻址的离子阱量子计算机中演示光镊门仍有待突破。

基于光学 Magnus 效应的方案

在离子阱量子计算的长期研究和自主平台建设基础上，我们实现了一种基于光学 Magnus 效应的纠缠门方案：类似于流体力学中的 Magnus 效应，具有自旋的离子在聚焦光流（光镊）中受到垂直于光传播方向的横向力。该方案利用紧聚焦激光的横向场梯度产生与量子态相关的推力，从而在离子之间建立量子纠缠。它省去了传统方案中复杂的反向传播激光配置，简化了实验光路与操作。

主要结果

在 ¹⁷¹Yb⁺ 离子系统中，经态制备与测量误差校正后，我们在双离子链和四离子链中测得的 Bell 态保真度分别为 98.7(1)% 和 97.2(4)%。理论上，这种量子门能够达到高于 99.99% 的保真度。我们分析了当前实验中限制保真度的主要因素，并预计未来可将误差降低一个数量级以上。

图 1. 基于偏振梯度的单离子寻址原理。声光偏转器（AOD）通过高数值孔径物镜产生多个激光光斑，光斑中的偏振梯度为各个离子提供自旋相关力。

研究意义

该技术的关键在于与光镊门的兼容性：光镊操作本身涉及横向运动，而该方案显著简化了光路配置，提高了光镊门在实验中的可实现性。这为构建大规模、可扩展的离子阱量子计算机提供了更简单、灵活的路径。

审稿人评价：“本文展示了光镊与线性离子链的成功结合，提出了一种巧妙而有力的机制，可在任意离子对之间实现双比特门操作……”以及“实现这类量子门的结果令人鼓舞，该方法解决了扩展离子阱量子计算中的一项重要挑战……”

论文链接：https://doi.org/10.1103/w5l6-wmrl

相关报道（光子盒）：https://news.qq.com/rain/a/20251225A06IAR00

（来源：中国科学报，王敏）

"A neural network assisted ¹⁷¹Yb⁺ quantum magnetometer" is published in npj Quantum Information

2022-12-22T10:00:00+08:00

Our work “A neural network assisted ¹⁷¹Yb⁺ quantum magnetometer” has been published in npj Quantum Information. We demonstrate the power of combining machine learning with quantum sensing by integrating neural networks into the data processing stage of a trapped-ion magnetometer, significantly extending its operational regime.

The Challenge

A versatile quantum magnetometer must deliver a readable response across a wide range of target field parameters. Standard atomic magnetometers operate in a regime leading to harmonic sensor responses, where RF target parameters are encoded in simple sinusoidal patterns. However, when the RF driving induces responses beyond this standard harmonic behavior — for instance, with large shot noise or in continuous single-shot measurement scenarios — the simple relationship between sensor responses and target parameters breaks down, making accurate field characterization extremely challenging.

Our Approach

We experimentally demonstrated that combining ¹⁷¹Yb⁺ atomic sensors with adequately trained neural networks enables us to investigate target fields in distinct challenging scenarios. Specifically, we characterized radio frequency (RF) fields in the presence of large shot noise, including the limit case of continuous data acquisition via single-shot measurements. The neural network learns the complex mapping between measured sensor responses and the underlying field parameters, effectively deciphering the information contained in non-trivial sensor responses.

Key Results

In the scenario of reduced measurement averaging, our neural network achieved an average estimation accuracy of 98.76% with only 100 measurement shots per data point. Even with as few as 30 shots, the accuracy remained at 98.31%. For continuous single-shot measurements, the regression between NN outputs and targets showed correlation coefficients exceeding R = 0.999. These results demonstrate that the hybridization of machine learning tools with quantum sensing techniques is a strategy that can be readily extended to other quantum platforms, such as nitrogen-vacancy centers in diamond.

Fig. 1. Energy levels of the ¹⁷¹Yb⁺ atomic sensor (a, b), the needle trap configuration (c), and the neural network architecture (d). The sensor response from the photomultiplier tube (PMT) is processed through a well-trained neural network to extract RF field parameters from complex sensor responses.

This work was a collaboration with researchers from the University of the Basque Country (UPV/EHU) in Spain.

Find the article here: https://doi.org/10.1038/s41534-022-00669-2

“神经网络辅助的 ¹⁷¹Yb⁺ 量子磁力计”发表于 npj Quantum Information

2022-12-22T10:00:00+08:00

我们的工作“神经网络辅助的 ¹⁷¹Yb⁺ 量子磁力计”已发表于 npj Quantum Information。我们将神经网络引入离子阱磁力计的数据处理环节，展示了机器学习与量子传感相结合的能力，显著拓展了磁力计的工作范围。

面临的挑战

通用量子磁力计必须在较宽的目标场参数范围内提供可读出的响应。标准原子磁力计工作在传感器呈现谐波响应的区间，射频目标场的参数被编码在简单的正弦模式中。然而，当射频驱动引起的响应超出这种标准谐波行为时，例如存在较大的散粒噪声或采用连续单次测量时，传感器响应与目标参数之间的简单关系便不再成立，使得准确表征场参数极具挑战。

我们的方法

我们通过实验展示，将 ¹⁷¹Yb⁺ 原子传感器与经过充分训练的神经网络结合，能够在不同的挑战性情形下研究目标场。具体而言，我们在存在较大散粒噪声的条件下表征了射频（RF）场，其中包括通过单次测量连续采集数据这一极限情形。神经网络学习测得的传感器响应与其背后的场参数之间的复杂映射，从而有效解读复杂传感器响应中包含的信息。

主要结果

在减少测量平均次数的情形下，我们的神经网络仅用每个数据点 100 次测量，就实现了 98.76% 的平均估计准确率。即使每个数据点仅测量 30 次，准确率仍保持在 98.31%。对于连续单次测量，神经网络输出与目标值之间的回归相关系数超过 R = 0.999。这些结果表明，将机器学习工具与量子传感技术相结合，是一种可以方便地推广到其他量子平台的策略，例如金刚石中的氮空位色心。

图 1. ¹⁷¹Yb⁺ 原子传感器的能级示意图（a、b）、针形离子阱配置（c）及神经网络架构（d）。光电倍增管（PMT）获得的传感器响应由训练好的神经网络处理，从复杂响应中提取射频场参数。

这项工作与西班牙巴斯克大学（UPV/EHU）的研究人员合作完成。

论文链接：https://doi.org/10.1038/s41534-022-00669-2

"Super-resolved Imaging of a Single Cold Atom on a Nanosecond Timescale" is published in Physical Review Letters

2021-12-24T10:00:00+08:00

Our work “Super-resolved Imaging of a Single Cold Atom on a Nanosecond Timescale” has been published in Physical Review Letters. We demonstrate a groundbreaking method to image a single trapped ion with unprecedented spatial and temporal resolution, breaking through the optical diffraction limit.

Breaking the Diffraction Limit

High-resolution optical detection and imaging of individual particles in cold atomic systems is essential for directly probing quantum phenomena such as transport, correlations, and phase transitions. However, traditional microscopy techniques are fundamentally restricted by the wavelength-scale diffraction limit, making them unsuitable for studying wave function details of many-body systems. We brought the concept of super-resolved microscopy — which has matured as a powerful tool in biology and chemistry — into the realm of cold atoms.

Our Method: Ground-State Depletion Microscopy

We demonstrated ground-state depletion (GSD) microscopy on a trapped-ion system for the first time. By combining the GSD control sequence with the qubit-state polarization and detection methods of ¹⁷¹Yb⁺ ions, we achieved 2D super-resolved imaging beyond the optical diffraction limit. The key innovation is using a high-purity doughnut-shaped laser beam, generated via a digital micromirror device (DMD) with in-situ aberration correction, to selectively deplete the ion’s quantum state.

Results

We achieved a spatial resolution of 175 nm using a NA = 0.1 imaging objective — a 13-fold improvement compared with direct fluorescence imaging. Moreover, the depletion process can be as short as ~50 ns under strong laser power, enabling us to take stroboscopic images on nanosecond timescales. We demonstrated this capability by observing one complete cycle of the ion’s secular motion within 735 ns, achieving a displacement detection sensitivity of 10 nm.

Fig. 1. Experimental scheme and setup. (a) Energy levels of ¹⁷¹Yb⁺ and the three-laser GSD imaging sequence. (b) A Paul trap with the doughnut beam focused through the top window. (c) Schematic of the super-resolved imaging process: scanning the doughnut spot pixel by pixel to build a super-resolved image.

Our method provides a powerful tool for probing particle positions, momenta, correlations, and dynamics in cold atomic systems, and can be readily extended to neutral atoms in optical tweezers.

Find the article here: https://doi.org/10.1103/PhysRevLett.127.263603

“单冷原子的纳秒尺度超分辨成像”发表于 Physical Review Letters

2021-12-24T10:00:00+08:00

我们的工作“单冷原子的纳秒尺度超分辨成像”已发表于 Physical Review Letters。我们展示了一种突破性方法，以前所未有的空间和时间分辨率对单个囚禁离子成像，突破了光学衍射极限。

突破衍射极限

对冷原子系统中单个粒子进行高分辨率光学探测和成像，是直接研究输运、关联及相变等量子现象的重要手段。然而，传统显微成像技术从根本上受到波长尺度衍射极限的限制，不适合研究多体系统波函数的细节。我们将已在生物学和化学中发展为强大工具的超分辨显微成像概念引入冷原子领域。

我们的方法：基态耗尽显微成像

我们首次在离子阱系统中演示了基态耗尽（GSD）显微成像。通过将 GSD 控制序列与 ¹⁷¹Yb⁺ 离子的量子比特态极化和探测方法相结合，我们实现了突破光学衍射极限的二维超分辨成像。关键创新在于，利用数字微镜器件（DMD）及原位像差校正产生高纯度的环形激光束，选择性地耗尽离子的量子态。

实验结果

使用数值孔径 NA = 0.1 的成像物镜，我们实现了 175 nm 的空间分辨率，相比直接荧光成像提升了 13 倍。此外，在较强激光功率下，耗尽过程可以短至约 50 ns，使我们能够在纳秒时间尺度上进行频闪成像。我们通过在 735 ns 内观测离子久期运动的一个完整周期，展示了这一能力，并实现了 10 nm 的位移探测灵敏度。

图 1. 实验方案与装置。（a）¹⁷¹Yb⁺ 的能级以及三激光 GSD 成像序列。（b）环形光束经顶部窗口聚焦的 Paul 阱。（c）超分辨成像过程示意图：逐像素扫描环形光斑，构建超分辨图像。

我们的方法为研究冷原子系统中的粒子位置、动量、关联和动力学提供了强有力的工具，并且可以方便地推广到光镊中的中性原子。

论文链接：https://doi.org/10.1103/PhysRevLett.127.263603

"Riemann zeros from Floquet engineering a trapped-ion qubit" is published in npj Quantum Information

2021-07-01T10:00:00+08:00

Our work “Riemann zeros from Floquet engineering a trapped-ion qubit” was published in npj Quantum Information on July 14, 2021. This work bridges quantum physics and number theory by experimentally measuring the zeros of the Riemann zeta function using a trapped-ion quantum system.

Background

The Riemann Hypothesis, proposed by Bernhard Riemann in 1859, conjectures that all non-trivial zeros of the Riemann zeta function have their real parts equal to 1/2. As one of the seven Millennium Prize Problems, its proof would profoundly advance our understanding of prime number distribution. An intriguing approach to this problem is the Hilbert-Pólya conjecture, which proposes the existence of a quantum system whose Hamiltonian eigenvalues correspond one-to-one with the Riemann zeros.

Our Approach

We proposed, for the first time internationally, a quasi-static Hamiltonian method. By designing a periodic driving function to modulate a trapped-ion qubit, we realized quasi-static evolution of the quantum state. When the driving parameter corresponds to a Riemann zero, the engineered quasienergies become degenerate and the quantum state remains frozen at integer multiples of the driving period — a phenomenon known as coherent destruction of tunneling. This is described by Floquet theory, where the quasienergies of the periodically driven system are regulated by the driving parameters. By scanning over the driving amplitude, the locations of the Riemann zeros can be measured to a high degree of accuracy.

Results

Using our self-developed trapped-ion system with long coherence times, we implemented 30-period high-fidelity driving and successfully measured the first 80 non-trivial Riemann zeros — improving upon previous work in this field by nearly two orders of magnitude. Our experimental results provide important evidence for studying the Hilbert-Pólya conjecture and deepening the connection between the Riemann Hypothesis and quantum systems.

Reviewers commented: “I am recommending publication, for several reasons: the high level of experimental ingenuity required to make the scheme work; the clear description of theory and experiment; and the large numbers and high accuracy of the measured zeros.”

Fig. 1. Experimental procedure to measure Floquet dynamics in a trapped-ion system. (a) The qubit is periodically driven by a microwave field generated by an AWG. (b) On the Bloch sphere, the qubit is initialized to |0⟩ and evolves to U(nT)|0⟩ after n periods of driving, with the freezing of dynamics revealing the Riemann zeros.

The first author of this paper is Dr. Ran He from our laboratory. This work was supported by the Ministry of Science and Technology, NSFC, CAS, and Anhui Province.

Find the article here: https://doi.org/10.1038/s41534-021-00446-7

利用离子量子比特的 Floquet 工程测量黎曼零点，成果发表于 npj Quantum Information

2021-07-01T10:00:00+08:00

我们的工作“Riemann zeros from Floquet engineering a trapped-ion qubit”于 2021 年 7 月 14 日发表于 npj Quantum Information。该工作利用离子阱量子系统在实验中测量黎曼 ζ 函数的零点，连接了量子物理与数论研究。

研究背景

Bernhard Riemann 于 1859 年提出黎曼猜想：黎曼 ζ 函数的所有非平凡零点，其实部均为 1/2。黎曼猜想是七个千禧年难题之一，其证明将促进人们理解质数分布。与之相关的 Hilbert–Pólya 猜想提出，可能存在一个量子系统，其哈密顿量的本征值与黎曼零点一一对应。

我们的方法

我们在国际上首次提出了准静态哈密顿量方法。通过设计周期驱动函数来调制离子量子比特，实现量子态的准静态演化。当驱动参数对应黎曼零点时，所构造系统的准能级发生简并，量子态在驱动周期的整数倍时刻保持不变，即发生相干隧穿抑制。这一过程由 Floquet 理论描述，周期驱动系统的准能量受到驱动参数调控。通过扫描驱动幅度，可以高精度地测量黎曼零点的位置。

实验结果

利用自主研制、具有长相干时间的离子阱系统，我们实现了 30 个周期的高保真驱动，成功测量了前 80 个非平凡黎曼零点，相比此前该领域的工作提升了近两个数量级。实验结果为研究 Hilbert–Pólya 猜想，以及理解黎曼猜想与量子系统之间的联系提供了重要依据。

审稿人评价：“我推荐发表这篇论文，原因包括：实现该方案所需的高度实验独创性，理论与实验描述清晰，以及测得的零点数量多、精度高。”

图 1. 测量离子阱系统中 Floquet 动力学的实验流程。（a）由任意波形发生器（AWG）产生的微波场对量子比特进行周期驱动。（b）Bloch 球上，量子比特初始化为 |0⟩，在 n 个驱动周期后演化为 U(nT)|0⟩；动力学冻结的位置揭示黎曼零点。

论文第一作者为本实验室贺冉博士。该工作得到科技部、国家自然科学基金委、中国科学院和安徽省的支持。

论文链接：https://doi.org/10.1038/s41534-021-00446-7

"Quantum thermodynamics in adiabatic open systems and its trapped-ion experimental realization" is published in npj Quantum Information

2020-09-18T10:00:00+08:00

Our work “Quantum thermodynamics in adiabatic open systems and its trapped-ion experimental realization” has been published in npj Quantum Information. In collaboration with our Brazilian colleagues, we established general formulas for quantum thermodynamics in adiabatic open systems, bridging quantum adiabatic processes and thermodynamic adiabatic processes, and verified our theory experimentally using trapped ions.

Motivation

Thermodynamics, built upon macroscopic observations of matter, has achieved tremendous success across many systems. With the development of quantum technology enabling precise preparation and control of quantum systems, a fundamental question emerges: do the laws of thermodynamics still apply at the quantum scale? Quantum thermodynamics has thus gradually developed, aiming to study the emergence and limits of thermodynamic laws from the microscopic perspective of quantum mechanics, addressing long-standing puzzles such as Maxwell’s demon.

Key Contributions

Quantum adiabatic processes and thermodynamic adiabatic processes are fundamental components of quantum theory and thermodynamics, respectively. Exploring the relationship between them is a fascinating and complex problem. We derived general formulas for heat, work, internal energy, and entropy in open quantum systems, and established that quantum mechanical adiabaticity and thermodynamic adiabaticity are generally not equivalent — thermal adiabaticity requires a sufficient condition satisfied by quantum systems adiabatically evolving under a steady-state trajectory.

Experimental Verification

We implemented the experiment using our trapped-ion system. The trapped ion offers long coherence times, multiple controllable degrees of freedom (spin and motion), and serves as an ideal platform for quantum information processing. We developed an innovative solution to simulate time-dependent decoherence channels by using noise-modulated carrier frequency, achieving a fidelity of over 99.5% in simulating the quantum decoherence channel. This enabled us to analyze heat and internal energy in a fully controllable dynamical process with high-fidelity quantum state manipulation.

Fig. 1. Experimental scheme to investigate the thermodynamics of adiabaticity in open quantum systems. (a) Schematic of the six-needle Paul trap and relevant energy levels. (b) Experimental microwave instrument for generating the driving field and controlling the Gaussian noise as a dephasing channel.

Reviewers gave high praise: “The present work would be one of the very few, and probably the most convincing, theoretical and experimental discussion on the relation between thermodynamical adiabatic processes and quantum adiabatic processes in open quantum systems.”

The first author is Dr. Chang-Kang Hu, a former PhD student from our laboratory. This work was supported by MOST, NSFC, CAS, Anhui Province, and the Postdoctoral Science Fund.

Find the article here: https://doi.org/10.1038/s41534-020-00300-2

绝热开放系统量子热力学的离子阱实验发表于 npj Quantum Information

2020-09-18T10:00:00+08:00

我们的工作“Quantum thermodynamics in adiabatic open systems and its trapped-ion experimental realization”发表于 npj Quantum Information。通过与巴西研究者合作，我们建立了绝热开放系统量子热力学的一般公式，连接量子绝热过程与热力学绝热过程，并利用囚禁离子在实验中验证了理论。

研究动机

热力学建立在对物质宏观行为的观察之上，在众多系统中取得了成功。随着量子技术的发展，人们能够精确制备和操控量子系统，由此产生一个基本问题：热力学定律在量子尺度是否仍然适用？ 量子热力学逐步发展，从量子力学的微观视角研究热力学定律的涌现及适用边界，并探讨 Maxwell 妖等长期存在的问题。

主要贡献

量子绝热过程与热力学绝热过程分别是量子理论和热力学的重要组成部分，二者的关系复杂而值得研究。我们推导了开放量子系统中热、功、内能和熵的一般公式，并明确了量子力学绝热性与热力学绝热性通常并不等价；沿稳态轨迹绝热演化的量子系统满足热力学绝热性的一项充分条件。

实验验证

实验在我们的离子阱系统中完成。囚禁离子具有长相干时间，以及自旋、运动等多个可控自由度，是量子信息处理的理想平台。我们通过噪声调制载波频率，发展了模拟随时间变化退相干通道的方案，模拟量子退相干通道的保真度超过 99.5%。借助高保真量子态操控，我们在完全可控的动力学过程中分析了热与内能。

图 1. 研究开放量子系统中绝热性热力学的实验方案。（a）六针 Paul 阱及相关能级示意图。（b）实验微波装置，用于产生驱动场，并控制作为退相干通道的高斯噪声。

审稿人评价：“关于开放量子系统中热力学绝热过程与量子绝热过程之间的关系，当前工作是为数不多、也可能是最有说服力的理论和实验讨论之一。”

论文第一作者为本实验室毕业博士胡长康。该工作得到科技部、国家自然科学基金委、中国科学院、安徽省和博士后科学基金的支持。

论文链接：https://doi.org/10.1038/s41534-020-00300-2

"Experimentally testing quantum critical dynamics beyond the Kibble-Zurek mechanism" is published in Communications Physics

2020-02-14T10:00:00+08:00

Our work “Experimentally testing quantum critical dynamics beyond the Kibble-Zurek mechanism” has been published in Communications Physics (Nature). Building on our earlier Kibble-Zurek experiment, we go beyond the standard KZM to probe the full probability distribution of topological defects formed during a quantum phase transition.

Beyond the Mean: Full Counting Statistics

The Kibble-Zurek mechanism (KZM) describes the universal dynamics across a phase transition, predicting that the average number of topological defects scales as a universal power law with the quench rate. However, the KZM focuses only on the mean number of defects. In this work, we aim to validate a much richer prediction: the measured distribution of kink pairs follows a Poisson binomial distribution, in which all low-order cumulants scale with universal power laws.

Quantum Simulation in Momentum Space

We experimentally probed the distribution of kink pairs in a one-dimensional quantum Ising chain driven across the paramagnet-ferromagnet quantum phase transition, using a single ¹⁷¹Yb⁺ trapped ion as a quantum simulator in momentum space. Each mode of the quantum Ising model is mapped to a Landau-Zener crossing, whose dynamics can be simulated with our ion-trap qubit. By measuring the excitation probability for each mode, we reconstruct the full counting statistics of topological defects.

Key Results

We experimentally verified the universal scaling of the first cumulants and reported deviations due to noise-induced dephasing of the trapped ion. Our results establish that the universal character of critical dynamics extends beyond KZM, from the mean kink number to the full probability distribution of topological defects — providing a much more stringent test of universality at quantum phase transitions.

Fig. 1. Experimental setup. (a) A single ¹⁷¹Yb⁺ ion trapped in a needle trap. (b) The qubit energy levels. (c) The qubit is driven by a microwave field, with operations programmed via an arbitrary waveform generator (AWG).

This work was done in collaboration with Fernando Javier Gómez-Ruiz and Adolfo del Campo from the Donostia International Physics Center, Spain.

Find the article here: https://doi.org/10.1038/s42005-020-0306-6

超越 Kibble–Zurek 机制的量子临界动力学实验发表于 Communications Physics

2020-02-14T10:00:00+08:00

我们的工作“Experimentally testing quantum critical dynamics beyond the Kibble-Zurek mechanism”发表于 Nature 旗下的 Communications Physics。在此前 Kibble–Zurek 实验的基础上，我们进一步超越标准机制，研究量子相变中形成的拓扑缺陷的完整概率分布。

从平均值到完整计数统计

Kibble–Zurek 机制（KZM）描述跨越相变时的普适动力学，预言拓扑缺陷的平均数量随淬火速率遵循普适幂律。然而，KZM 关注的是缺陷数量的平均值。本工作检验了更丰富的预言：畴壁对的数量服从泊松二项分布，其各个低阶累积量均遵循普适幂律标度。

动量空间中的量子模拟

我们利用单个囚禁 ¹⁷¹Yb⁺ 离子作为动量空间量子模拟器，研究一维量子 Ising 链在跨越顺磁—铁磁量子相变过程中产生的畴壁对分布。量子 Ising 模型的每个模式均可映射到一次 Landau–Zener 能级穿越，其动力学由离子量子比特模拟。通过测量各个模式的激发概率，我们重建了拓扑缺陷的完整计数统计。

主要结果

我们在实验中验证了低阶累积量的普适标度，并观察、分析了离子噪声引起的退相干所导致的偏离。结果表明，临界动力学的普适性超越了 KZM 对平均缺陷数量的描述，扩展到拓扑缺陷的完整概率分布，为量子相变中的普适性提供了更严格的实验检验。

图 1. 实验装置。（a）针状离子阱中囚禁的单个 ¹⁷¹Yb⁺ 离子。（b）量子比特的能级。（c）量子比特由微波场驱动，操作通过任意波形发生器（AWG）编程控制。

本工作与西班牙 Donostia 国际物理中心的 Fernando Javier Gómez-Ruiz 和 Adolfo del Campo 合作完成。

论文链接：https://doi.org/10.1038/s42005-020-0306-6

"Experimental demonstration of suppressing residual geometric dephasing" is published in Science Bulletin

2019-09-20T10:00:00+08:00

Our work “Experimental demonstration of suppressing residual geometric dephasing” has been published in Science Bulletin. We experimentally demonstrate effective suppression of residual geometric dephasing — a key obstacle for high-fidelity geometric quantum gates — using modified dynamical decoupling schemes on a single trapped ¹⁷¹Yb⁺ ion.

The Problem: Residual Geometric Dephasing

The geometric phase (Berry phase) is a promising strategy for fault-tolerant quantum information processing because it depends only on the geometry of the path executed, not the dynamics. However, decoherence caused by environmental noise destroys the geometric phase. Traditional dynamical decoupling sequences such as Spin Echo (SE) and CPMG can eliminate dynamic dephasing but cannot reduce residual geometric dephasing, which remains a critical barrier for high-precision geometric quantum manipulation.

Our Solution

We designed modified dynamical decoupling schemes that carefully choose the angles of neighboring adiabatic paths on the Bloch sphere. By varying the tilt angles in the SE and CPMG sequences, we ensure that the accumulated geometric dephasing in successive segments cancels out. This is achieved through two schemes:

Modified SE: Using different slant angles for neighboring evolution segments so that the geometric dephasing contributions cancel.
Modified CPMG: Separating adiabatic paths into four parts with swapping π pulses, ensuring zero net geometric dephasing.

Results

Our experimental results demonstrate that the modified schemes can reduce the dephasing rate by more than one order of magnitude compared with traditional dynamical decoupling schemes in the regime where residual geometric dephasing dominates. We also investigated the impact of noise intensity and correlation time on the coherence of the quantum system, confirming that these methods are effective across a wide range of noise conditions.

Fig. 1. Dynamics of Hamiltonian H in the Bloch sphere and corresponding geometric phase. (a) The Hamiltonian H tilted by angle θ evolves around the z axis, accumulating both dynamic and geometric phases. (b) The spin echo strategy, where the Hamiltonian rotates in opposite directions, eliminates dynamic phase and acquires pure geometric phase.

Find the article here: https://doi.org/10.1016/j.scib.2019.09.007

抑制残余几何退相干的实验成果发表于 Science Bulletin

2019-09-20T10:00:00+08:00

我们的工作“Experimental demonstration of suppressing residual geometric dephasing”发表于 Science Bulletin。我们在单个囚禁 ¹⁷¹Yb⁺ 离子上，利用改进的动力学解耦序列有效抑制了残余几何退相干——这一效应是实现高保真几何量子门的重要障碍。

残余几何退相干问题

几何相位（Berry 相位）只依赖演化路径的几何性质，而不依赖具体的动力学过程，因此为容错量子信息处理提供了一条有前景的路径。然而，环境噪声导致的退相干会破坏几何相位。传统的自旋回波（SE）和 CPMG 等动力学解耦序列可以消除动力学退相干，却无法降低残余几何退相干，后者限制了高精度几何量子操控。

我们的方案

我们设计了改进的动力学解耦序列，精确选择 Bloch 球上相邻绝热演化路径的角度。通过调整 SE 和 CPMG 序列中的倾角，使连续演化区段中积累的几何退相干相互抵消。具体包括两种方案：

改进的 SE 序列：为相邻演化区段选取不同的倾角，使几何退相干贡献相互抵消。
改进的 CPMG 序列：将绝热演化路径分为四个部分，并插入交换作用的 π 脉冲，使净几何退相干为零。

实验结果

在残余几何退相干占主导的条件下，改进序列相比传统动力学解耦序列将退相干速率降低了一个数量级以上。我们还研究了噪声强度和关联时间对量子系统相干性的影响，验证了这些方法在较宽噪声条件范围内的有效性。

图 1. Bloch 球上哈密顿量 H 的演化及相应几何相位。（a）哈密顿量 H 与 z 轴夹角为 θ，绕 z 轴演化，同时积累动力学相位和几何相位。（b）自旋回波方案使哈密顿量沿相反方向转动，消除动力学相位并获得纯几何相位。

论文链接：https://doi.org/10.1016/j.scib.2019.09.007

Mingzhong Ai

2018-05-09T00:00:00+08:00

Personal data

Address: Key Laboratory of Quantum Information, CAS, USTC, Jinzhai Road #96, Hefei, Anhui, P. R. China, 230026
Phone: (+86) 18214880012
E-mail: amz@mail.ustc.edu.cn

Education

Ph.D. (enrolled September 2016), Key Lab of Quantum Information, Department of Optics and Optical Engineering, University of Science and Technology of China, Hefei, Anhui, China
2012.9-2016.7 B.Sc., Department of Physics, Shandong University, Jinan, Shandong, China

"An Ultraviolet Fiber Fabry–Pérot Cavity for Florescence Collection of Trapped Ions" is published

2017-01-22T10:20:00+08:00

Our work “An Ultraviolet Fiber Fabry–Pérot Cavity for Florescence Collection of Trapped Ions” has been published in Chinese Physics Letters. We demonstrate a fiber Fabry–Pérot cavity (FFPC) operating in the ultraviolet range at 369 nm, specifically designed for enhancing fluorescence collection from trapped ¹⁷¹Yb⁺ ions — a key technology for building scalable quantum networks.

Why Fiber Cavities?

Trapped ions are an ideal platform for quantum information processing, but building a large-scale quantum computer and long-distance quantum communication requires the ability to remotely distribute entanglement between ions. The key ingredient is efficient photon collection. A fiber Fabry–Pérot cavity can provide a large Purcell factor to enhance the photon emission rate while maintaining high coupling efficiency between the single fiber mode and the cavity mode — solving the long-standing problem of low photon collection efficiency.

Technical Achievements

We designed the FFPC at the bad cavity limit for fluorescence enhancement at the ²P_1/2 to ²S_1/2 transition wavelength of Yb⁺. The concave mirror profiles on fiber-end faces were fabricated using CO₂ laser machining with spatial filtering, achieving an averaged eccentricity of only 0.22 ± 0.04. The mirrors were coated for high reflection in the ultraviolet range by ion-beam sputtering, achieving a coating reflectivity of 99.76% and a finesse of 1300 ± 100.

Key Results

Based on measured experimental parameters and numerical simulation, we estimate:

Purcell factor > 2.5
Single-mode fiber collection efficiency > 10%

These results demonstrate the FFPC’s potential to entangle remote ions, which is the basis for constructing quantum networks and developing distributed quantum computation.

Fig. 1. Schematic diagram of the laser machining setup for fabricating FFPCs, and surface characterization of the machined fiber-end face using AFM. The setup uses a CO₂ laser with spatial filtering to produce concave mirror profiles with high circularity.

Find the article here: https://doi.org/10.1088/0256-307X/34/1/013701

用于囚禁离子荧光收集的紫外光纤微腔成果发表于 Chinese Physics Letters

2017-01-22T10:20:00+08:00

我们的工作“An Ultraviolet Fiber Fabry–Pérot Cavity for Florescence Collection of Trapped Ions”发表于 Chinese Physics Letters。我们研制了工作在 369 nm 紫外波段的光纤 Fabry–Pérot 腔（FFPC），用于增强囚禁 ¹⁷¹Yb⁺ 离子的荧光收集，为可扩展量子网络提供关键器件。

为什么使用光纤微腔？

囚禁离子是量子信息处理的重要平台，而大规模量子计算与远距离量子通信需要在离子之间远程分发纠缠。其中的关键是高效收集光子。光纤 Fabry–Pérot 腔能够通过较大的 Purcell 因子增强光子发射速率，同时保持光纤单模与腔模之间的高耦合效率，为低光子收集效率问题提供解决途径。

技术进展

我们在坏腔极限下设计 FFPC，以增强 Yb⁺ 离子 ²P_1/2 至 ²S_1/2 跃迁波段的荧光。利用经过空间滤波的 CO₂ 激光加工光纤端面凹镜，获得平均偏心率仅为 0.22 ± 0.04 的镜面。采用离子束溅射制备紫外高反射膜后，镜面反射率达到 99.76%，腔精细度为 1300 ± 100。

主要结果

根据实验测得的参数与数值模拟，我们估计：

Purcell 因子大于 2.5。
单模光纤收集效率大于 10%。

这些结果展示了 FFPC 用于远程离子纠缠的潜力，而远程离子纠缠是构建量子网络与发展分布式量子计算的基础。

图 1. 制备 FFPC 的激光加工装置示意图，以及利用原子力显微镜（AFM）获得的光纤端面形貌。装置采用经过空间滤波的 CO₂ 激光，制备圆度较高的凹镜面。

论文链接：https://doi.org/10.1088/0256-307X/34/1/013701

"Experimental Trapped-ion Quantum Simulation of the Kibble-Zurek dynamics in momentum space" is published

2016-09-22T10:20:00+08:00

Our work Experimental Trapped-ion Quantum Simulation of the Kibble-Zurek dynamics in momentum space was published in Scientific Reports. This was our group’s first trapped-ion experiment, following the development of the platform that began in 2013. We thank our collaborators Le Luo and Adolfo del Campo for their contributions to the experiment and theory.

Simulating a quantum phase transition

The Kibble–Zurek mechanism predicts how defects form when a system is driven through a continuous phase transition. Testing this scaling in a quantum system requires controlled state preparation, tunable dynamics and accurate measurements of the resulting excitations.

We used a single trapped ion to simulate a transverse-field Ising chain in momentum space. Each momentum mode is represented by a two-level system, allowing its excitation probability to be measured separately. Combining these measurements reconstructs the defect density of the simulated chain.

The experiment observed the predicted power-law scaling as the system crossed the quantum critical point at different rates, providing an experimental test of the Kibble–Zurek mechanism in the quantum regime.

Fig. 1. Experimental platform: the six-needle ion trap, the hyperfine levels used as a qubit, and the microwave control system that drives the simulated dynamics.

Paper link: Scientific Reports 6, 33381 (2016)

“动量空间中 Kibble–Zurek 动力学的离子阱量子模拟实验”发表

2016-09-22T10:20:00+08:00

我们的工作“动量空间中 Kibble–Zurek 动力学的离子阱量子模拟实验”发表于 Scientific Reports。这是课题组自 2013 年开始建设离子阱平台以来的首项离子阱实验成果。感谢合作者 Le Luo 和 Adolfo del Campo 在实验与理论方面的贡献。

模拟量子相变

Kibble–Zurek 机制描述了系统跨越连续相变时拓扑缺陷的产生规律。在量子系统中检验这一标度关系，需要精确的初态制备、可控的演化过程，以及对最终激发的准确测量。

我们利用单个囚禁离子，在动量空间模拟横场 Ising 链。每个动量模式都对应一个可单独操控的二能级系统，通过测量各模式的激发概率，重建模拟自旋链中的缺陷密度。

实验观察到，以不同速率跨越量子临界点后，缺陷密度遵循预期的幂律标度关系，从而在量子区间检验了 Kibble–Zurek 机制。

图 1. 实验平台：六针离子阱、用于编码量子比特的超精细能级，以及驱动模拟动力学的微波控制系统。

论文链接：Scientific Reports 6, 33381 (2016)

Ran He

2016-09-21T10:20:00+08:00

PhD alumnus
office:316
email:heran@mail.ustc.edu.cn

Introduction:

I received my bachelor’s degree from Dalian University of Technology (DUT). During a summer visit to USTC, I became interested in trapping single ions and manipulating their quantum states with lasers, and subsequently joined the ion-trap group as a PhD student. My doctoral research focused on developing ion traps for confining multiple ions and addressing them individually.

In 2017.11 to 2018.11, I visited Jonathan’s ion trap group (TIQI) at ETH, Zurich as an academic guest.

Chang-Kang Hu

2016-09-19T10:20:00+08:00

Jin-Ming Cui

2016-09-19T10:20:00+08:00

Personal Information

Education

2008.9-2013.6, University of Science and Technology of China, Department of Optics and Optical Engineering, Doctor
2004.8-2008.6, University of Science and Technology of China, Department of Physics, Bachelor

Research

Quantum information with trapped ions. Quantum simulation, cavity QED, quantum network, distributed quantum computation.

Wei-Min Lv

2016-09-19T10:20:00+08:00

Education

2013.9-2016.6, University of Science and Technology of China, Department of Optics and Optical Engineering, PhD
2009.8-2013.6, Hefei University of Technology, School of Instrument Science and Opto-electronic Engineering, Bachelor

Contact

Tel: +86 13866664268
Email: weimin@mail.ustc.edu.cn
Address: Key Laboratory of Quantum Information, CAS, USTC, 96 Jinzhai Road, Hefei, Anhui 230026, China