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author:

Chen, Ke-Ji (Chen, Ke-Ji.) [1] | Yi, Wei (Yi, Wei.) [2] | Wu, Fan (Wu, Fan.) [3]

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Abstract:

We study the dynamic generation of persistent current by phase imprinting fermionic atoms in a ring geometry at zero temperature. Mediated by the pairing interaction, the Fermi condensate dynamically acquires a quantized current by developing azimuthal phase slips, as well as density and pairing-order-parameter depletions. Resorting to the Bogolioubov-de Gennes formalism, we investigate the time evolution of the transferred total angular momentum and the quantized superfluid current throughout the phase-imprinting process. This enables a detailed self-consistent analysis of the impact of interaction, as well as different initial pairing states, on the superflow formation, in contrast to previous theoretical analysis based on the Gross-Pitaevskii equation with artificially imposed phases. In particular, we show that, as the interaction strength increases, the azimuthal density distribution becomes less susceptible to the phase imprinting potential, leading to a smaller quantized current under the same imprinting parameters. Our results offer microscopic insights into the dynamic development of superflow in the phase-imprinting process, and are helpful for the ongoing experimental effort. © 2025 authors. Published by the American Physical Society.

Keyword:

Angular momentum Fermions Supersonic flow

Community:

  • [ 1 ] [Chen, Ke-Ji]Key Laboratory of Quantum States of Matter and Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University, Hangzhou; 310018, China
  • [ 2 ] [Yi, Wei]CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei; 230026, China
  • [ 3 ] [Yi, Wei]CAS Center for Excellence in Quantum Information and Quantum Physics, Hefei; 230026, China
  • [ 4 ] [Yi, Wei]Hefei National Laboratory, University of Science and Technology of China, Hefei; 230088, China
  • [ 5 ] [Wu, Fan]Fujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fujian, Fuzhou; 350108, China

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Source :

Physical Review Research

ISSN: 2643-1564

Year: 2025

Issue: 1

Volume: 7

3 . 5 0 0

JCR@2023

Cited Count:

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ESI Highly Cited Papers on the List: 0 Unfold All

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Chinese Cited Count:

30 Days PV: 0

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