Controlled dephasing of Andreev states in superconducting quantum point-contacts

A. Levy Yeyati; M. A. Desposito

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Controlled dephasing of Andreev states in superconducting quantum point-contacts

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arxiv cond-mat/0108351 v1 pith:YGLFMPOR submitted 2001-08-22 cond-mat.mes-hall cond-mat.supr-con

M. A. Desposito , A. Levy Yeyati This is my paper

classification cond-mat.mes-hallcond-mat.supr-con

keywords contactdephasingquantumsuperconductingallowsandreevapproachappropriate

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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 to determine the appropriate range of parameters for the observation of coherent oscillations in the current through the contact.

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