报告题目：Entangled states of 3000 atoms with negative Wigner fun

报 告 人：张昊，MIT

报告时间：2015年10月30日10：00

报告地点：理科楼三楼报告厅（C302）

报告摘要：Entangled states of many particles are of interest in quantum information, quantum simulation and precision measurements. We generate an entangled state of 3,000 atoms via interaction with a cavity optical field, and heralded by the detection of a single photon. We measure the spin distributions of this many-atom spin system, and demonstrate a negative Wigner quasi-probability function. This technique can be extended to produce more complicated entangled states, and to realize atomic interferometers that surpass the standard quantum limit.