Vortices and antivortices in two-dimensional ultracold Fermi gases

G. Bighin, L. Salasnich, Scientific Reports 7 (2017).

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Journal Article | Published | English
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Abstract
Vortices are commonly observed in the context of classical hydrodynamics: from whirlpools after stirring the coffee in a cup to a violent atmospheric phenomenon such as a tornado, all classical vortices are characterized by an arbitrary circulation value of the local velocity field. On the other hand the appearance of vortices with quantized circulation represents one of the fundamental signatures of macroscopic quantum phenomena. In two-dimensional superfluids quantized vortices play a key role in determining finite-temperature properties, as the superfluid phase and the normal state are separated by a vortex unbinding transition, the Berezinskii-Kosterlitz-Thouless transition. Very recent experiments with two-dimensional superfluid fermions motivate the present work: we present theoretical results based on the renormalization group showing that the universal jump of the superfluid density and the critical temperature crucially depend on the interaction strength, providing a strong benchmark for forthcoming investigations.
Publishing Year
Date Published
2017-04-04
Journal Title
Scientific Reports
Volume
7
Article Number
45702
ISSN
IST-REx-ID

Cite this

Bighin G, Salasnich L. Vortices and antivortices in two-dimensional ultracold Fermi gases. Scientific Reports. 2017;7. doi:10.1038/srep45702
Bighin, G., & Salasnich, L. (2017). Vortices and antivortices in two-dimensional ultracold Fermi gases. Scientific Reports, 7. https://doi.org/10.1038/srep45702
Bighin, Giacomo, and Luca Salasnich. “Vortices and Antivortices in Two-Dimensional Ultracold Fermi Gases.” Scientific Reports 7 (2017). https://doi.org/10.1038/srep45702.
G. Bighin and L. Salasnich, “Vortices and antivortices in two-dimensional ultracold Fermi gases,” Scientific Reports, vol. 7, 2017.
Bighin G, Salasnich L. 2017. Vortices and antivortices in two-dimensional ultracold Fermi gases. Scientific Reports. 7.
Bighin, Giacomo, and Luca Salasnich. “Vortices and Antivortices in Two-Dimensional Ultracold Fermi Gases.” Scientific Reports, vol. 7, 45702, Nature Publishing Group, 2017, doi:10.1038/srep45702.
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