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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2024, Volume 119, Issue 1, Pages 40–45
DOI: https://doi.org/10.31857/S1234567824010087 (Mi jetpl7125) 		 
CONDENSED MATTER

Effect of dephasing on the current through a periodically driven quantum point contact

I. V. Ermakovab, O. V. Lychkovskiyac

a Department of Mathematical Methods for Quantum Technologies, Steklov Mathematical Institute, Russian Academy of Sciences, Moscow, 119991 Russia
b Russian Quantum Center, Skolkovo, Moscow, 121205 Russia
c Skolkovo Institute of Science and Technology, Moscow, 121205 Russia
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DOI: https://doi.org/10.31857/S1234567824010087
Abstract: We consider two one-dimensional quantum XX magnets linked by a periodically driven quantum point contact. If magnets are initially polarized in opposite directions, one expects that a spin current through the quantum point contact will establish. It has been shown recently [Phys. Rev. B 103, L041405 (2021)] that, in fact, when the driving frequency exceeds a critical value, the current halts completely, the quantum point contact being effectively insulating. Here we enquire how this picture is affected by quantum dephasing. Our findings reveal that any nonzero dephasing restores the current.
Funding agency Grant number
Ministry of Science and Higher Education of the Russian Federation 075-15-2020-788
This work was supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 075-15-2020-788).
Received: 25.10.2023
Revised: 14.11.2023
Accepted: 15.11.2023
English version:
Journal of Experimental and Theoretical Physics Letters, 2024, Volume 119, Issue 1, Pages 40–45
DOI: https://doi.org/10.1134/S0021364023603299
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Document Type: Article
Language: Russian
Citation: I. V. Ermakov, O. V. Lychkovskiy, “Effect of dephasing on the current through a periodically driven quantum point contact”, Pis'ma v Zh. Èksper. Teoret. Fiz., 119:1 (2024), 40–45; JETP Letters, 119:1 (2024), 40–45
Citation in format AMSBIB
\Bibitem{ErmLyc24}
\by I.~V.~Ermakov, O.~V.~Lychkovskiy
\paper Effect of dephasing on the current through a periodically driven quantum point contact
\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2024
\vol 119
\issue 1
\pages 40--45
\mathnet{http://mi.mathnet.ru/jetpl7125}
\crossref{https://doi.org/10.31857/S1234567824010087}
\edn{https://elibrary.ru/saihcb}
\transl
\jour JETP Letters
\yr 2024
\vol 119
\issue 1
\pages 40--45
\crossref{https://doi.org/10.1134/S0021364023603299}
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