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Exponential sensitivity to dephasing of electrical conduction through a quantum dot.

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Exponential sensitivity to dephasing of electrical conduction through a quantum dot. / Tworzydlo, J.; Tajic, A.; Schomerus, H. et al.
In: Physical review letters, Vol. 93, 2004, p. 186806.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Tworzydlo, J, Tajic, A, Schomerus, H, Brouwer, PW & Beenakker, CWJ 2004, 'Exponential sensitivity to dephasing of electrical conduction through a quantum dot.', Physical review letters, vol. 93, pp. 186806. https://doi.org/10.1103/PhysRevLett.93.186806

APA

Tworzydlo, J., Tajic, A., Schomerus, H., Brouwer, P. W., & Beenakker, C. W. J. (2004). Exponential sensitivity to dephasing of electrical conduction through a quantum dot. Physical review letters, 93, 186806. https://doi.org/10.1103/PhysRevLett.93.186806

Vancouver

Tworzydlo J, Tajic A, Schomerus H, Brouwer PW, Beenakker CWJ. Exponential sensitivity to dephasing of electrical conduction through a quantum dot. Physical review letters. 2004;93:186806. doi: 10.1103/PhysRevLett.93.186806

Author

Tworzydlo, J. ; Tajic, A. ; Schomerus, H. et al. / Exponential sensitivity to dephasing of electrical conduction through a quantum dot. In: Physical review letters. 2004 ; Vol. 93. pp. 186806.

Bibtex

@article{97f0bfbf2d4f4111865bd97ddc57042d,
title = "Exponential sensitivity to dephasing of electrical conduction through a quantum dot.",
abstract = "According to random-matrix theory, interference effects in the conductance of a ballistic chaotic quantum dot should vanish propto(tau_phi/tau_D)^p when the dephasing time tau_phi becomes small compared to the mean dwell time tau_D. Aleiner and Larkin have predicted that the power law crosses over to an exponential suppression exp({\^a}��tau_E/tau_phi) when tau_phi drops below the Ehrenfest time tau_E. We report the first observation of this crossover in a computer simulation of universal conductance fluctuations. Their theory also predicts an exponential suppression propto exp({\^a}��tau_E/tau_D) in the absence of dephasing{\^a}��which is not observed. We show that the effective random-matrix theory proposed previously for quantum dots without dephasing explains both observations.",
author = "J. Tworzydlo and A. Tajic and H. Schomerus and Brouwer, {P. W.} and Beenakker, {C. W. J.}",
year = "2004",
doi = "10.1103/PhysRevLett.93.186806",
language = "English",
volume = "93",
pages = "186806",
journal = "Physical review letters",
publisher = "American Physical Society",

}

RIS

TY - JOUR

T1 - Exponential sensitivity to dephasing of electrical conduction through a quantum dot.

AU - Tworzydlo, J.

AU - Tajic, A.

AU - Schomerus, H.

AU - Brouwer, P. W.

AU - Beenakker, C. W. J.

PY - 2004

Y1 - 2004

N2 - According to random-matrix theory, interference effects in the conductance of a ballistic chaotic quantum dot should vanish propto(tau_phi/tau_D)^p when the dephasing time tau_phi becomes small compared to the mean dwell time tau_D. Aleiner and Larkin have predicted that the power law crosses over to an exponential suppression exp(�tau_E/tau_phi) when tau_phi drops below the Ehrenfest time tau_E. We report the first observation of this crossover in a computer simulation of universal conductance fluctuations. Their theory also predicts an exponential suppression propto exp(�tau_E/tau_D) in the absence of dephasing�which is not observed. We show that the effective random-matrix theory proposed previously for quantum dots without dephasing explains both observations.

AB - According to random-matrix theory, interference effects in the conductance of a ballistic chaotic quantum dot should vanish propto(tau_phi/tau_D)^p when the dephasing time tau_phi becomes small compared to the mean dwell time tau_D. Aleiner and Larkin have predicted that the power law crosses over to an exponential suppression exp(�tau_E/tau_phi) when tau_phi drops below the Ehrenfest time tau_E. We report the first observation of this crossover in a computer simulation of universal conductance fluctuations. Their theory also predicts an exponential suppression propto exp(�tau_E/tau_D) in the absence of dephasing�which is not observed. We show that the effective random-matrix theory proposed previously for quantum dots without dephasing explains both observations.

U2 - 10.1103/PhysRevLett.93.186806

DO - 10.1103/PhysRevLett.93.186806

M3 - Journal article

VL - 93

SP - 186806

JO - Physical review letters

JF - Physical review letters

ER -