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.
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)
关键词
TLS
微波场
系统
驾驶
共振
量子位
耦合强度
突然死亡
Superconducting phase qubit - Two- level system - Entanglement
Concurrence
Decoherence
