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Nonequilibrium transport through an interacting monitored quantum dot

  • Daniel Werner
  • , Matthieu Vanhoecke
  • , Marco Schirò
  • , Enrico Arrigoni
  • Graz University of Technology
  • Collège de France

Research output: Contribution to journalArticlepeer-review

Abstract

We study the interplay between strong correlations and Markovian dephasing, resulting from monitoring the charge or spin degrees of freedom of a quantum dot described by a dissipative Anderson impurity model. Using the auxiliary master equation approach, we compute the steady-state spectral function and occupation of the dot and discuss the role of dephasing on Kondo physics. Furthermore, we consider a two-lead setup that allows to compute the steady-state current and conductance. We show that the Kondo steady state is robust to moderate charge dephasing but not to spin dephasing, which we interpret in terms of dephasing-induced heating of low-energy excitations. Finally, we show universal scaling collapse of the nonlinear conductance with a dephasing-dependent Kondo scale.

Original languageEnglish
Article number013203
JournalPhysical Review Research
Volume8
Issue number1
DOIs
Publication statusPublished - 1 Jan 2026
Externally publishedYes

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