Eur. Phys. J. D 63, 483-488 (2011)
https://doi.org/10.1140/epjd/e2011-20086-3

Regular Article

Entanglement control in a superconducting qubit system by an electromagnetic field

Zhejiang Institute of Modern Physics and Physics Department, Zhejiang University, Hangzhou 310027, P.R. China

^a e-mail: xujb@zju.edu.cn

Received: 30 September 2010
Received in final form: 2 April 2011
Published online: 28 June 2011

Abstract

By making use of the dynamical algebraic method we investigate a quantum system consisting of superconducting qubits interacting with data buses, where the qubits are driven by time-dependent electromagnetic field and obtain an explicit expression of time evolution operator. Furthermore, we explore the entanglement dynamics and the influence of the time-dependent electromagnetic field and the initial state on the entanglement sudden death and birth for the system. It is shown that the entanglement between the qubit and bus as well as the entanglement sudden death and birth can be controlled by the time-dependent electromagnetic field.