Dynamics of a qubit—TLS system under resonant microwave driving  

作　　者：Jianxin Shi Weiwei Xu Guozhu Sun Jiquan Zhai Zhican Du Lin Wang Tao Hua Jian Chen Lin Kang Peiheng Wu 

机构地区：[1]Research Institute of Superconductor Electronics (RISE),School of Electronic Science and Engineering,Nanjing University

出　　处：《Chinese Science Bulletin》2014年第21期2547-2551,共5页

基　　金：supported by the National Basic Research Program of China (2011CBA00107 and 2011CBA00202);the National Natural Science Foundation of China (61371036,11074114 and 11227904);the Natural Science Foundation of Jiangsu (BK2012013);the CAEP THz Science and Technology Foundation (CAEPTHZ201206)

摘　　要：We demonstrate the effect of different coupling strengths between a microscopic two-level system(TLS)and a microwave field on the dynamics of a qubit—TLS system when the bipartite system is subject to resonant microwave driving.Rabi beating with a different TLSmicrowave coupling strength is demonstrated in simulations.Entanglement,quantified by the concurrence between the qubit and TLS,both for pure states and mixed states,is simulated.When decoherence is considered,entanglement of the bipartite system oscillates with damping and exhibits entanglement sudden death and/or entanglement sudden death and revival.We demonstrate the effect of different cou- pling strengths between a microscopic two-level system （TLS） and a microwave field on the dynamics of a qubit-- TLS system when the bipartite system is subject to reso- nant microwave driving. Rabi beating with a different TLS- microwave coupling strength is demonstrated in simulations. Entanglement, quantified by the concurrence between the qubit and TLS, both for pure states and mixed states, is simulated. When decoherence is considered, entanglement of the bipartite system oscillates with damping and exhibits entanglement sudden death and/or entanglement sudden death and revival.

关 键 词：TLS 微波场 系统 驾驶 共振 量子位 耦合强度 突然死亡 

分 类 号：O413[理学—理论物理]