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Quantum coherence in a mesoscopic Josephson junction with dissipation

被引：4
|
作者：
Zou, J [1 ]
Shao, B [1 ]
机构：
[1] Beijing Inst Technol, Dept Appl Phys, Beijing 100081, Peoples R China
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.64.024511
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A mesoscopic Josephson junction in a superconducting ring enclosing a magnetostatic flux with dissipation is considered. The dissipation in this system is described as a consequence of its coupling to a reservoir. By solving the master equation it is shown that the state of the junction can evolve into a quantum superposition of two coherent states even when the dissipation is present. It is also shown that squeezing effects can exist in such a system, and the dynamic behavior of the supercurrent shows collapse and revival phenomena. The quantum decoherence is also discussed.
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页数：7
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