Entanglement and Mixedness of a Superconducting Qubit Coupled to an Open Superconducting Cavity


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Abstract

We investigate entanglement and mixedness of a superconducting qubit coupled to the damped cavity field. We introduce a new measure for the mixedness and find that the phase damping of the cavity leads to simultaneous long-death of the entropy squeezing, the purity of the qubit states, and the entanglement of the field–qubit system.

About the authors

A.-B. A. Mohamed

College of Science and Humanities, Prince Sattam Bin Abdulaziz University; Faculty of Science, Assiut University

Author for correspondence.
Email: abdelbastm@yahoo.com
Saudi Arabia, Al-Aflaj; Assiut

H. Eleuch

Department of Physics, McGill University; Institute for Quantum Science and Engineering Texas A&M University College Station

Email: abdelbastm@yahoo.com
Canada, Montreal, H3A 2T8; Texas, 77843

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