报告题目： Quantum Operation of Phonons and Entanglement of Multi-Species Ions
In scaling up the trapped-ion system, phonons serve an important role as the quantum bus to mediate multi-qubit operations in the trap. Moreover, phonons by themselves can be used as the carrier of information to perform quantum simulations and computations. In this presentation, various control protocols of phonons are discussed and demonstrated, including the uniform driving, the projective measurement and the generation of arbitrary NOON states of phonons. The entanglement of a 171Yb+ ion and a 138Ba+ ion through the Mølmer-Sørensen interaction is also demonstrated. The trapped-ion system to implement these protocols consists of a 171Yb+ ion and a 138Ba+ ion with the quantum control realized by stimulated Raman transitions. Some details of this system are discussed as well.