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3月7日学术报告:PT symmetric non-unitary quantum walks

学术报告:PT-symmetric non-unitary quantum walks

报告人:Hideaki Obyse 教授(Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan

时间: 37号(周二)上午10:00

地点: 田家炳楼南203

欢迎各位老师、同学参加!

 

Abstract: We study Floquet topological phases driven by PT symmetric nonunitary time evolution in one dimension, based on an experimental setup of discrete-time quantum walks. We develop, for nonunitary time-evolution operators, a procedure to calculate topological invariants for Floquet topological phases and nd that the bulk-edge correspondence gives correct predictions of the emergent edge states. These edge states make exponential growth of wavefunction amplitudes at speci c positions with
time controllable. Hereby, we propose that these phenomena inherent in open quantum systems are feasibly observed by present experiments of quantum walks in both classical and quantum regimes.
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