Wehrl entropy information and purity of a SC charge qubit interacting with a lossy cavity field

A system of a superconducting charge qubit with gate change ne not equal 1/2 interacting with a single-mode microwave cavity field, coupled to its reservoir, is introduced. The system is transformed into the usual laynes-Cummings model by canonical transformation. Analytical and numerical results under certain parametric conditions are obtained by means of which we analyze the influence of the damping terms and the detuning on the dynamics of Wehrl entropy and purity loss of the states. The results indicate the sensitivity of these aspects to change either in the decay or in the cletuning parameters. An interesting relation between the correlation and decoherence effect is observed. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecuintnons.urg/licenses/by-nc-nd/3.0/).