[学术报告]薛鹏博士

学术报告: Quantum walk on circles in phase space via superconducting circuit quantum electrodynamics[加拿大卡尔加利大学  薛鹏博士]

题目：Quantum walk on circles in phase space via superconducting circuit quantum electrodynamics
时间：2008年05月05日星期一下午15:00
地点：仓山校区物理楼四楼学术报告厅
报告人： 薛鹏博士
附：附薛鹏博士简历和报告摘要
薛鹏，女，博士。1995年至2004年就读于中国科学技术大学，先后获学士、博士学位，2004年9月至2006年9月于奥地利科学院量子光学量子信息学院从事博士后研究工作。现在加拿大卡尔加利大学量子信息科学研究所从事博士后研究。主要研究方向包括：量子光学，原子分子光学，量子信息。
Quantum walk on circles in phase space via superconducting circuit quantum electrodynamics
We show how a quantum walk in phase space can be implemented via cavity or circuit quantum electrodynamics (CQED) where only the resonator field (i.e. the walker) needs to be driven and measured. The atom or Cooper pair box (i.e. the coin) is controlled indirectly via Jaynes-Cummings coupling. Decoherence can be tuned so that the transition from quantum to classical walk can be controlled, which confirms the quantum nature of the walk. In contrast to previous proposals for CQED realizations, the walker is not confined to one circle in phase space (fixed mean energy) but rather leaps to other circles in phase space. Despite this complication, the quantum enhanced diffusion of walker's phase can be cleanly observed and rigorously explained, thereby enabling the first experimental realization of a single-walker quantum walk.