Eur. Phys. J. D (2012) 66: 210
https://doi.org/10.1140/epjd/e2012-30105-6

Regular Article

Preserving quantum correlations in two superconducting qubits by applying time-dependent magnetic fields

¹ Department of Mathematics and PhysicsNorth China Electric Power University, Beijing 102206, P.R. China
² School of Physics and Electronics, Guizhou Normal University, Guiyang 550001, P.R. China

^a e-mail: yqzhang@ncepu.edu.cn

Received: 12 February 2012
Received in final form: 9 April 2012
Published online: 16 August 2012

Abstract

We propose a scheme to preserve quantum correlations in a dissipative superconducting qubit system, which consists of two noninteracting dissipative superconducting flux qubits, each driven by a time-dependent magnetic field. We investigate the influence of the initial states and the time-dependent magnetic fields on the dynamics of quantum correlations between the two flux qubits. It is shown that the quantum correlations between the two qubits can be improved in the Markovian regime and well preserved in the non-Markovian regime by applying the time-dependent magnetic fields.