Controlled dephasing of Andreev states in superconducting quantum point contacts -: art. no. 140511

被引：37

作者：

Despósito, MA

Yeyati, AL

机构：

[1] Univ Buenos Aires, Fac Ciencias Exactas & Nat, Dept Fis, RA-1428 Buenos Aires, DF, Argentina

[2] Univ Autonoma Madrid, Fac Ciencias, Dept Fis Mat Condensada C5, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.64.140511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the relaxation and dephasing processes in a superconducting quantum point contact induced by the interaction with an electromagnetic environment. Based on a density matrix approach we obtain the rates for the dissipative dynamics as function of the transmission, the phase difference on the contact, and the external impedance. Our calculation allows us to determine the appropriate range of parameters for the observation of coherent oscillations in the current through the contact.

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页数：4

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