Vortices and antivortices in two-dimensional ultracold Fermi gases
arXiv:1703.02427 · doi:10.1038/srep45702
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.
17 pages, 2 figures
References in corpus (11)
- Quantised Vortices in an Exciton-Polariton Fluid
- Quantum Fluctuations in the Superfluid State of the BCS-BEC Crossover
- Characterization of reconnecting vortices in superfluid helium
- Equation of state of a superfluid Fermi gas in the BCS-BEC crossover
- Observation of the Berezinskii-Kosterlitz-Thouless Phase Transition in an Ultracold Fermi Gas
- Vortex proliferation in the Berezinskii-Kosterlitz-Thouless regime on a two-dimensional lattice of Bose-Einstein condensates
- Berezinskii-Kosterlitz-Thouless transition in trapped quasi-two-dimensional Fermi gas near a Feshbach resonance
- Pairing effects in the normal phase of a two-dimensional Fermi gas
- Effects of spin-orbit coupling on the Berezinskii-Kosterlitz-Thouless transition and the vortex-antivortex structure in two-dimensional Fermi gases
- Pseudogap and preformed pairs in the imbalanced Fermi gas in two dimensions
- Composite bosons in the 2D BCS-BEC crossover from Gaussian fluctuations
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- Sound modes in collisional superfluid Bose gases
- Density correlation functions and the spatial structure of the two-dimensional BEC-BCS crossover
- Renormalization of the superfluid density in the two-dimensional BCS-BEC crossover
- Dimensionality-induced BCS-BEC crossover in layered superconductors
- Goldstone and Higgs Hydrodynamics in the BCS-BEC Crossover
- Unitary Fermi superfluid near the critical temperature: thermodynamics and sound modes from elementary excitations
- Emergent interlayer nodal superfluidity of a dipolar fermi gas in bilayer optical lattices
- Amplitude, phase, and topological fluctuations shaping the complex phase diagram of two-dimensional superconductors
- Predictive power of the Berezinskii-Kosterlitz-Thouless theory based on Renormalization Group throughout the BCS-BEC crossover in 2D superconductors
- Finite-size effects in the two-dimensional BCS-BEC crossover
- First and second sound in two-dimensional bosonic and fermionic superfluids
- Beyond Random Phase Approximation in electron-hole bilayer superfluidity