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Open Quantum Systems Decoherence

Effect of Dephasing on the Current through a Periodically Driven Quantum Point Contact

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Authors: I. Ermakov, O. Lychkovskiy

Year

2023

Paper ID

13757

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

88

Citations

2

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.

Why This Paper Matters

  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
  • It adds a 2023 reference point for readers tracking recent quantum research.
  • We consider two one-dimensional quantum XX magnets linked by a periodically driven quantum point contact.

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References & Citation Signals

[1] DOI https://doi.org/10.1134/s0021364023603299 [2] Publisher https://doi.org/10.1134/s0021364023603299

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Current Paper #13757

External citation index: OpenAlex citation signal • updated 2026-11-01 00:25:13

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