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author:

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

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.

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Community:

  • [ 1 ] [Chen, Ke-Ji]Zhejiang Sci Tech Univ, Dept Phys, Key Lab Quantum States Matter & Opt Field Manipula, Hangzhou 310018, Peoples R China
  • [ 2 ] [Yi, Wei]Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Peoples R China
  • [ 3 ] [Yi, Wei]CAS Ctr Excellence Quantum Informat & Quantum Phys, Hefei 230026, Peoples R China
  • [ 4 ] [Yi, Wei]Univ Sci & Technol China, Hefei Natl Lab, Hefei 230088, Peoples R China
  • [ 5 ] [Wu, Fan]Fuzhou Univ, Coll Phys & Informat Engn, Fujian Key Lab Quantum Informat & Quantum Opt, Fuzhou 350108, Fujian, Peoples R China

Reprint 's Address:

  • [Chen, Ke-Ji]Zhejiang Sci Tech Univ, Dept Phys, Key Lab Quantum States Matter & Opt Field Manipula, Hangzhou 310018, Peoples R China;;[Wu, Fan]Fuzhou Univ, Coll Phys & Informat Engn, Fujian Key Lab Quantum Informat & Quantum Opt, Fuzhou 350108, Fujian, Peoples R China

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Source :

PHYSICAL REVIEW RESEARCH

Year: 2025

Issue: 1

Volume: 7

3 . 5 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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