Thermal entanglement in superconducting quantum-interference-device qubits coupled to cavity field

Details Thermal entanglement in superconducting quantum-interference-device qubits coupled to cavity field Thermal entanglement in superconducting quantum-interference-device qubits coupled to cavity field

2004-02-15

arxiv.org/abs/cond-mat/0402393v1

Chin. Phys. Lett. 21 (2002) 424-427

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 2 figures

Scientific paper

10.1088/0256-307X/21/3/002

In this paper, we investigate thermal entanglement in a superconducting-quantum-interference-device qubit coupled to a cavity field. We show that the entanglement can be manipulated by varying temperature and an effective controlling parameter $B$ which depends on the external field and characteristic parameters of the system. We find that there exists a critical value of the controlling parameter $B_c$. Under a fixed temperature, increasing $B$ can increase entanglement in the regime of $BB_c$.

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