Effect of Population Imbalance on Vortex Mass in Superfluid Fermi Gases

Abstract

One of the fundamental parameters associated with quantized vortices in superfluids is the vortex mass, which is the inertia of a vortex. As of yet, this mass has not been observed in a superfluid. However, ultracold Fermi gases provide a promising platform in which recently much experimental progress was made, offering tunability of the interaction as well as control on the single-vortex level. Not only can the scattering length be freely tuned, allowing exploration of the BEC-BCS crossover, but also an imbalance between different pseudospin states can be introduced. We study the effect of introducing this imbalance on the vortex mass, using a method based on an effective field theory for superfluid Fermi gases. We find that it is crucial to consider the imbalance in conjunction with nonzero temperatures; at some temperatures, the vortex mass is significantly enhanced while at others, the vortex mass is diminished. This pronounced temperature dependence highlights the need for careful tuning of experimental conditions and identifies favorable parameter regimes in which the vortex mass is likely to be observed.

References in corpus (33)

• Pairing and Phase Separation in a Polarized Fermi Gas
• Fermionic Superfluidity with Imbalanced Spin Populations and the Quantum Phase Transition to the Normal State
• BEC-BCS crossover in "magnetized" Feshbach-resonantly paired superfluids
• Homogeneous Atomic Fermi Gases
• Imbalanced Feshbach-resonant Fermi gases
• Finite temperature phase diagram of a polarised Fermi condensate
• Equation of state of a superfluid Fermi gas in the BCS-BEC crossover
• Heavy Solitons in a Fermionic Superfluid
• Evolution from BCS Superconductivity to Bose Condensation: Analytic Results for the crossover in three dimensions
• Motion of a Solitonic Vortex in the BEC-BCS Crossover
• Dynamics of Few Co-rotating Vortices in Bose-Einstein Condensates
• Dynamic vortex mass in clean Fermi superfluids and superconductors
• Vortex-Antivortex Lattice in Ultra-Cold Fermi Gases
• Imprinting persistent currents in tunable fermionic rings
• Vortices with massive cores in a binary mixture of Bose-Einstein condensates
• Dynamics of massive point vortices in binary mixture of Bose-Einstein condensates
• Deterministic creation, pinning, and manipulation of quantized vortices in a Bose-Einstein condensate
• The effect of population imbalance on the Berezinskii-Kosterlitz-Thouless phase transition in a superfluid Fermi gas
• Vortex Mass in a Superfluid
• Pseudogap and preformed pairs in the imbalanced Fermi gas in two dimensions
• Temperature dependence of the pair coherence and healing lengths for a fermionic superfluid throughout the BCS-BEC crossover
• Connecting shear-flow and vortex array instabilities in annular atomic superfluids
• Temperature dependence of a vortex in a superfluid Fermi gas
• Vortex Core Structure in Neutral Fermion Superfluids with Population Imbalance
• Visualization of vortex bound states in polarized Fermi gases at unitarity
• Relative dynamics of quantum vortices and massive cores in binary BECs
• Spin-Current Instability at a Magnetic Domain Wall in a Ferromagnetic Superfluid: a Generation Mechanism of Eccentric Fractional Skyrmions
• Mass of Abrikosov vortex in high-temperature superconductor YBaCuO
• Suppression of the superfluid Kelvin-Helmholtz instability due to massive vortex cores, friction and confinement
• Picosecond Trajectory of Two-dimensional Vortex Motion in FeSe${}_{0.5}$Te${}_{0.5}$ Visualized by Terahertz Second Harmonic Generation
• Universal description of massive point vortices and verification methods of vortex inertia in superfluids
• Vortex Mass in Superfluid Fermi Gases along the BEC-BCS Crossover
• Dynamical signature of vortex mass in Fermi superfluids