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Title

Charge-Relaxation and Dwell Time in the Fluctuating Admittance of a Chaotic Cavity

Authors
Brouwer, P.W.
Published in Europhysics Letters. 1997, vol. 37, no. 7, p. 441-446
Abstract We consider the admittance of a chaotic quantum dot, capacitively coupled to a gate and connected to two electron reservoirs by multichannel ballistic point contacts. For a dot in the regime of weak-localization and universal conductance fluctuations, we calculate the average and variance of the admittance using random-matrix theory. We find that the admittance is governed by two time-scales: the classical admittance depends on the RC-time of the quantum dot, but the relevant time scale for the weak-localization correction and the admittance fluctuations is the dwell time. An extension of the circular ensemble is used for a statistical description of the energy dependence of the scattering matrix.
Keywords Mesoscopic systems and quantum hall effect
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BROUWER, P.W., BUTTIKER, Markus. Charge-Relaxation and Dwell Time in the Fluctuating Admittance of a Chaotic Cavity. In: Europhysics Letters, 1997, vol. 37, n° 7, p. 441-446. https://archive-ouverte.unige.ch/unige:4277

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Deposited on : 2009-11-30

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