Critical Rotation of an Annular Superfluid Bose Gas
arXiv:1204.6183 · doi:10.1103/PhysRevA.86.011602
Abstract
We analyze the excitation spectrum of a superfluid Bose-Einstein condensate rotating in a ring trap. We identify two important branches of the spectrum related to outer and inner edge surface modes that lead to the instability of the superfluid. Depending on the initial circulation of the annular condensate, either the outer or the inner modes become first unstable. This instability is crucially related to the superfluid nature of the rotating gas. In particular we point out the existence of a maximal circulation above which the superflow decays spontaneously, which cannot be explained by invoking the average speed of sound.
arXiv comment5 pages, 5 figures, PRA Rapid Comm
References in corpus (16)
- Bose-Einstein condensation in quasi2D trapped gases
- Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
- Superflow in a toroidal Bose-Einstein condensate: an atom circuit with a tunable weak link
- Evidence for a critical velocity in a Bose-Einstein condensed gas
- Dynamics of Bose condensed gases in highly deformed traps
- Toroidal optical dipole traps for atomic Bose-Einstein condensates using Laguerre-Gaussian beams
- Time-averaged adiabatic ring potential for ultracold atoms
- A ring trap for ultracold atoms
- Time-Averaged Adiabatic Potentials: Versatile traps and waveguides for ultracold quantum gases
- Vortex-Induced Phase Slip Dissipation in a Toroidal Bose-Einstein Condensate Flowing Through a Barrier
- Critical velocity in cylindrical Bose-Einstein condensates
- Vortex signatures in annular Bose-Einstein condensates
- Local vortex nucleation and the surface mode spectrum of large condensates
- Nonadiabatic creation of macroscopic superpositions with strongly correlated 1D bosons on a ring trap
- Rotation of a Bose-Einstein Condensate held under a toroidal trap
- Phase fluctuations in anisotropic Bose condensates: from cigars to rings
Cited by in corpus (39)
- Quantised supercurrent decay in an annular Bose-Einstein condensate
- Superfluid behaviour of a two-dimensional Bose gas
- Atomtronic circuits: from many-body physics to quantum technologies
- Threshold for creating excitations in a stirred superfluid ring
- Imprinting persistent currents in tunable fermionic rings
- Collective Excitation Interferometry with a Toroidal Bose-Einstein Condensate
- Static and dynamic properties of shell-shaped condensates
- Persistent currents with non-quantized angular momentum
- Decay of a superfluid current of ultra-cold atoms in a toroidal trap
- Oscillations and decay of superfluid currents in a one-dimensional Bose gas on a ring
- Vortices in a toroidal Bose-Einstein condensate with a rotating weak link
- Low-dimensional quantum gases in curved geometries
- Critical velocity for a toroidal Bose-Einstein condensate flowing through a barrier
- Resonant wavepackets and shock waves in an atomtronic SQUID
- Vortex excitation in a stirred toroidal Bose-Einstein condensate
- Perspective on new implementations of atomtronic circuits
- Analysis of a trapped Bose-Einstein condensate in terms of position, momentum, and angular-momentum variance
- Persistent currents in ultracold gases
- Metastability, excitations, fluctuations, and multiple-swallowtail structures of a superfluid in a Bose-Einstein condensate in the presence of a uniformly moving defect
- Toroidal Dipolar Supersolid with a Rotating Weak Link
- Dynamic and Energetic Stabilization of Persistent Currents in Bose-Einstein Condensates
- Superfluid flow past an obstacle in annular Bose--Einstein condensates
- Persistent currents in coherently coupled Bose-Einstein condensates in a ring trap
- Spin-orbit-coupled spin-1 Bose-Einstein condensates in a toroidal trap: even-petal-number necklacelike state and persistent flow
- Bogoliubov excitations in the quasiperiodic kicked rotor: stability of a kicked condensate and the quasi-insulator-metal transition
- Condensates in annuli: Dimensionality of the variance
- Mean-field yrast spectrum and persistent currents in a two-component Bose gas with interaction asymmetry
- Self-interference of a toroidal Bose-Einstein condensate
- Phonon-Josephson resonances in atomtronic circuits
- Delocalization and superfluidity of ultracold bosonic atoms in a ring lattice
- Rotational properties of non-dipolar and dipolar Bose-Einstein condensates confined in annular potentials
- Stability of persistent currents in superfluid fermionic rings
- Excitation spectrum of a toroidal spin-1 Bose-Einstein condensate
- Critical angular velocity for vortex lines formation
- Precursor phenomena of nucleations of quantized vortices in the presence of a uniformly moving obstacle in Bose-Einstein condensates
- Excitation spectrum of vortex-lattice modes in a rotating condensate with a density-dependent gauge potential
- Parametric triggering of vortices in toroidally trapped rotating Bose-Einstein condensates
- Analytic Vortex Dynamics in an Annular Bose-Einstein Condensate
- Bogoliubov Theory for a Superfluid Bose Gas Flowing in a Random Potential: Stability and Critical Velocity