Work

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

Year: 2023

Type: article

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.

Source: Journal of Experimental and Theoretical Physics Letters

DOI: 10.1134/s0021364023603299

Authors: I. Ermakov, O. Lychkovskiy

Institutions: Russian Academy of Sciences, Steklov Mathematical Institute, Russian Quantum Center, Skolkovo Institute of Science and Technology

Language: English

Topic: Quantum and electron transport phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4390191818

FWCI: 0.233

Cites: 38

Cited by: 2

Related to: 10