Journal
SYMMETRY-BASEL
Volume 13, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/sym13050802
Keywords
charge– qubit system; quasi-probability wigner function; entanglement
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Funding
- Taif University Researchers Supporting Project, Taif University, Taif, Saudi Arabia [TURSP-2020/17]
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In this study, a superconducting charge qubit interacting with a dissipative microwave cavity field is analyzed for the effects of qubit-cavity interaction, qubit-cavity detuning, and dissipation on Wigner distribution and its non-classicality. The research shows that the amplitudes and frequency of the Wigner distribution can be controlled by various parameters, including the phase space parameters, qubit-cavity interaction, detuning, and dissipation. Cavity dissipation reduces non-classicality, and this reduction can be accelerated by the detuning.
We explore a superconducting charge qubit interacting with a dissipative microwave cavity field. Wigner distribution and its non-classicality are investigated analytically under the effects of the qubit-cavity interaction, the qubit-cavity detuning, and the dissipation. As the microwave cavity field is initially in an even coherent state, we investigate the non-classicality of the Wigner distributions. Partially and maximally frozen entanglement are produced by the qubit-cavity interaction, depending on detuning and cavity dissipation. It is found that the amplitudes and frequency of the Wigner distribution can be controlled by the phase space parameters, the qubit-cavity interaction and the detuning, as well as by the dissipation. The cavity dissipation reduces the non-classicality; this process can be accelerated by the detuning.
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