Eur. Phys. J. B 74, 81-89 (2010)
https://doi.org/10.1140/epjb/e2010-00056-y

Delayed creation of entanglement in superconducting qubits interacting with a microwave field

¹ Department of Mathematics, College of Science, University of Bahrain & Sohag University, P.O. Box 82524, Sohag, Egypt
² College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
³ Centre for Theoretical Physics, The British University, P.O. Box 43, El Sherouk City, Egypt
⁴ Department of Physics, Loughborough University, Leicestershire, LE11 3TU, UK

Corresponding author: abdelatyquantum@gmail.com

Received: 12 May 2009
Revised: 11 December 2009
Published online: 16 February 2010

Abstract

We explore the role played by the intrinsic decoherence in superconducting charge qubits in the presence of a microwave field applied as a magnetic flux. We study how the delayed creation of entanglement, which is opposite to the sudden death of entanglement, can be induced. We compute the time evolution of the population inversion, total correlation and entanglement, taking into account the junction mixed state and dissipation of the cavity field. We show that although decoherence destroys the correlation of the junction and field, information of the initial state may be obtained via quasi-probability distribution functions.