Distribution of parametric conductance derivatives of a quantum dot

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dc.creatorBrouwer, P. W.
dc.creatorvan Langen, S. A.
dc.creatorFrahm, K. M.
dc.creatorButtiker, M.
dc.creatorBeenakker, C. W. J.
dc.date1997-05-13
dc.date.accessioned2026-07-07T09:11:43Z
dc.date.available2026-07-07T09:11:43Z
dc.descriptionThe conductance G of a quantum dot with single-mode ballistic point contacts depends sensitively on external parameters X, such as gate voltage and magnetic field. We calculate the joint distribution of G and dG/dX by relating it to the distribution of the Wigner-Smith time-delay matrix of a chaotic system. The distribution of dG/dX has a singularity at zero and algebraic tails. While G and dG/dX are correlated, the ratio of dG/dX and $\sqrt{G(1-G)}$ is independent of G. Coulomb interactions change the distribution of dG/dX, by inducing a transition from the grand-canonical to the canonical ensemble. All these predictions can be tested in semiconductor microstructures or microwave cavities.
dc.description4 pages, RevTeX, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/9705116
dc.identifierhttp://arxiv.org/abs/cond-mat/9705116
dc.identifierPhys. Rev. Lett. 79, 913 (1997)
dc.identifierdoi:10.1103/PhysRevLett.79.913
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/151781
dc.subjectMesoscale and Nanoscale Physics
dc.titleDistribution of parametric conductance derivatives of a quantum dot
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