Persistent Currents in Rings of Ultracold Fermionic Atoms

Cai, Yanping; Allman, Daniel; Sabharwal, Parth; Wright, Kevin

doi:10.1103/physrevlett.128.150401

Cited by 34 publications

(16 citation statements)

References 63 publications

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“…First introduced in cosmology [8,9] and later generalized to the systems with broken U(1) symmetry [10][11][12], this mechanism can describe the formation of topological defects during rapid thermal quench after heating the sample with a thermal pulse. Such a scenario has been observed in a superfluid helium [13][14][15], superconducting systems [16][17][18][19][20] and cold atoms condensate [21,22]. In superconductors, Kibble-Zurek mechanism always results in the creation of vortex-antivortex pairs which should annihilate during the post-quench dynamics.…”

Section: Introductionmentioning

confidence: 92%

All-optical generation of Abrikosov vortices by the Inverse Faraday Effect

Plastovets,

Tokman,

Lounis

et al. 2023

Preprint

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Within the framework of the time-dependent Ginzburg-Landau theory we show that circularly polarized THz or far-infrared radiation induces a dc supercurrent that influences the dynamics of vortex-antivortex pair formation in a mesoscopic superconductor undergoing rapid thermal quenching. The Lorentz force arising from the supercurrents promotes vortex-antivortex separation and allows survival of the vortex polarity defined by the helicity of light. Based on this idea, we propose a two-stage irradiation scheme that provides a powerful method for controlled all-optical generation of Abrikosov vortices.

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Section: Introductionmentioning

confidence: 92%

All-optical generation of Abrikosov vortices by the Inverse Faraday Effect

Plastovets,

Tokman,

Lounis

et al. 2023

Preprint

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“…The general strategy of atomtronics together with its primary objectives for quantum simulation, sensing, previously require a matter-wave flow aligning with the agenda of atomtronics. For fermions, the experimental read-out of persistent currents is more problematic to implement due to the lower condensate fraction and the condensate's rapid expansion owing to the high chemical potential [61,62].…”

Section: Introductionmentioning

confidence: 99%

Perspective on new implementations of atomtronic circuits

Polo,

Chetcuti,

Domanti

et al. 2024

Quantum Sci. Technol.

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In this article, we provide perspectives for atomtronics circuits on quantum technology platforms beyond simple bosonic or fermionic cold atom matter-wave currents. Specifically, we consider (i) matter-wave schemes with multi-component quantum fluids; (ii) networks of Rydberg atoms that provide a radically new concept of atomtronics circuits in which the flow, rather than in terms of matter, occurs through excitations; (iii) hybrid matterwave circuits - a combination of ultracold atomtronic circuits with other quantum platforms that can lead to circuits beyond the standard solutions and provide new schemes for integrated matter-wave networks.We also sketch how driving these systems can open new pathways for atomtronics.

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“…The confinement provided by the potential barrier surrounding the vortex core makes even multi-charged (q > 1) metastable vortex states highly robust. The generation and stability of these atomic flows in condensates with toroidal topology have been extensively explored both experimentally [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] and theoretically [48][49][50][51][52][53][54][55][56][57][58][59]. These investigations have revealed their topological protection in the absence of external driving, highlighting their robust nature.…”

Section: Introductionmentioning

confidence: 99%

Engineering phase and density of Bose–Einstein condensates in curved waveguides with toroidal topology

Nikolaieva,

Salasnich,

Yakimenko

2023

New J. Phys.

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We investigate the effects of ellipticity-induced curvature on atomic Bose-Einstein condensates confined in quasi-one-dimensional closed-loop waveguides. Our theoretical study reveals intriguing phenomena arising from the interplay between curvature and interactions. Density modulations are observed in regions of high curvature, but these modulations are suppressed by strong repulsive interactions. Additionally, we observe phase accumulation in regions with the lowest curvature when the waveguide with persistent current is squeezed. Furthermore, waveguides hosting persistent currents exhibit dynamic transformations between states with different angular momenta. These findings provide insights into the behaviour of atomic condensates in curved waveguides, with implications for fundamental physics and quantum technologies. The interplay between curvature and interactions offers opportunities for exploring novel quantum phenomena and engineering quantum states in confined geometries.

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Persistent Currents in Rings of Ultracold Fermionic Atoms

Cited by 34 publications

References 63 publications

All-optical generation of Abrikosov vortices by the Inverse Faraday Effect

All-optical generation of Abrikosov vortices by the Inverse Faraday Effect

Perspective on new implementations of atomtronic circuits

Engineering phase and density of Bose–Einstein condensates in curved waveguides with toroidal topology

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