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Optimal control over the full counting statistics in a nonadiabatic pump

F. Impens1,*, F. M. D’Angelis1, D. Guéry-Odelin2, F. A. Pinheiro1, and C. Lewenkopf1

  • *Contact author: impens@if.ufrj.br
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Phys. Rev. Research 7, 033253 – Published 15 September, 2025

DOI: https://doi.org/10.1103/j8kn-bn7j

Abstract

We introduce a systematic procedure based on optimal control theory to address the full counting statistics of particle transport in a stochastic system. Our approach enhances the performance of a Thouless pump in the nonadiabatic regime by simultaneously optimizing the average pumping rate while minimizing noise. We demonstrate our optimization procedure on a paradigmatic model for the electronic transport through a quantum dot, both in the limit of vanishing Coulomb interaction and in the interacting regime. Our method enables independent control of the moments associated with charge and spin transfer, allowing for the enhancement of spin current with minimal charge current or the independent tuning of spin and charge fluctuations. These results underscore the versatility of our approach, which can be applied to a broad class of stochastic systems.

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Phys. Rev. Research 7, 033253– Published 15 September, 2025
  • Received 18 March 2025
  • Accepted 11 July 2025
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