Dynamic generation of superflow in a fermionic ring through phase imprinting
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-ord...
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American Physical Society
2025-01-01
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Series: | Physical Review Research |
Online Access: | http://doi.org/10.1103/PhysRevResearch.7.013022 |
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author | Ke-Ji Chen Wei Yi Fan Wu |
author_facet | Ke-Ji Chen Wei Yi Fan Wu |
author_sort | Ke-Ji Chen |
collection | DOAJ |
description | 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. |
format | Article |
id | doaj-art-1af11e96d9264946afba3728fd89201c |
institution | Kabale University |
issn | 2643-1564 |
language | English |
publishDate | 2025-01-01 |
publisher | American Physical Society |
record_format | Article |
series | Physical Review Research |
spelling | doaj-art-1af11e96d9264946afba3728fd89201c2025-01-07T15:03:06ZengAmerican Physical SocietyPhysical Review Research2643-15642025-01-017101302210.1103/PhysRevResearch.7.013022Dynamic generation of superflow in a fermionic ring through phase imprintingKe-Ji ChenWei YiFan WuWe 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.http://doi.org/10.1103/PhysRevResearch.7.013022 |
spellingShingle | Ke-Ji Chen Wei Yi Fan Wu Dynamic generation of superflow in a fermionic ring through phase imprinting Physical Review Research |
title | Dynamic generation of superflow in a fermionic ring through phase imprinting |
title_full | Dynamic generation of superflow in a fermionic ring through phase imprinting |
title_fullStr | Dynamic generation of superflow in a fermionic ring through phase imprinting |
title_full_unstemmed | Dynamic generation of superflow in a fermionic ring through phase imprinting |
title_short | Dynamic generation of superflow in a fermionic ring through phase imprinting |
title_sort | dynamic generation of superflow in a fermionic ring through phase imprinting |
url | http://doi.org/10.1103/PhysRevResearch.7.013022 |
work_keys_str_mv | AT kejichen dynamicgenerationofsuperflowinafermionicringthroughphaseimprinting AT weiyi dynamicgenerationofsuperflowinafermionicringthroughphaseimprinting AT fanwu dynamicgenerationofsuperflowinafermionicringthroughphaseimprinting |