Threshold for creating excitations in a stirred superfluid ring
arXiv:1312.0988 · doi:10.1103/PhysRevA.88.063633
Abstract
We have measured the threshold for creating long-lived excitations when a toroidal Bose-Einstein condensate is stirred by a rotating (optical) barrier of variable height. When the barrier height is on the order of or greater than half of the chemical potential, the critical barrier velocity at which we observe a change in the circulation state is much less than the speed for sound to propagate around the ring. In this regime we primarily observe discrete jumps (phase slips) from the non-circulating initial state to a simple, well-defined, persistent current state. For lower barrier heights, the critical barrier velocity at which we observe a change in the circulation state is higher, and approaches the effective sound speed for vanishing barrier height. The response of the condensate in this small-barrier regime is more complex, with vortex cores appearing in the bulk of the condensate. We find that the variation of the excitation threshold with barrier height is in qualitative agreement with the predictions of an effective 1D hydrodynamic model.
8 pages, 5 figures
References in corpus (11)
- Vortices and Superfluidity in a Strongly Interacting Fermi Gas
- Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
- Experimental demonstration of painting arbitrary and dynamic potentials for Bose-Einstein condensates
- Stationary and non-stationary fluid flow of a Bose-Einstein condensate through a penetrable barrier
- Persistent currents in spinor condensates
- Superfluid behaviour of a two-dimensional Bose gas
- Critical velocity for superfluid flow across the BEC-BCS crossover
- Critical velocity of superfluid flow through single barrier and periodic potentials
- Critical Rotation of an Annular Superfluid Bose Gas
- A superfluid 4He interferometer operating near 2 K
- Vortex Dynamics in an Annular Bose-Einstein Condensate
Cited by in corpus (51)
- Roadmap on Atomtronics: State of the art and perspective
- Atomtronic circuits: from many-body physics to quantum technologies
- Resistive flow in a weakly interacting Bose-Einstein condensate
- Critical Velocity for Vortex Shedding in a Bose-Einstein Condensate
- Annular Vortex Chain in a Resonantly Pumped Polariton Superfluid
- Quantum simulation of non-trivial topology
- Relaxation dynamics of local observables in integrable systems
- Contact resistance and phase slips in mesoscopic superfluid atom transport
- 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
- Vortices and vortex lattices in quantum ferrofluids
- Phase-slips and vortex dynamics in Josephson oscillations between Bose-Einstein condensates
- Vortex excitation in a stirred toroidal Bose-Einstein condensate
- Coupled Atomic Wires in a Synthetic Magnetic Field
- Stationary state after a quench to the Lieb-Liniger from rotating BECs
- Optical Lattice with Torus Topology
- Decay mechanisms of superflow of Bose-Einstein condensates in ring traps
- Spin-orbit-coupled Bose-Einstein-condensed atoms confined in annular potentials
- Engineering Dark Solitary waves in Ring-Trap Bose-Einstein condensates
- Perspective on new implementations of atomtronic circuits
- Persistent current oscillations in a double-ring quantum gas
- Superflow decay in a toroidal Bose gas: The effect of quantum and thermal fluctuations
- Persistent superfluid flow arising from the He-McKellar-Wilkens effect in molecular dipolar condensates
- 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
- Instability of the superfluid flow as black-hole lasing effect
- Matter-wave Fractional Revivals in a Ring Waveguide
- Optimizing persistent currents in a ring-shaped Bose-Einstein condensate using machine learning
- Bose-Einstein condensate confined in a 1D ring stirred with a rotating delta link
- A versatile apparatus for two-dimensional atomtronic quantum simulation
- Superfluidity fraction of few bosons in an annular geometry in the presence of a rotating weak link
- Quantum Vortices in Curved Geometries
- Single-particle versus many-body phase coherence in an interacting Fermi gas
- Thermally activated phase slips of one-dimensional Bose gases in shallow optical lattices
- Current production in ring condensates with a weak link
- Motion of an Impurity in a Bose-Einstein Condensate with Weyl Spin-Orbit Coupling: Non-collinear Drag Force and Anisotropic Critical Velocity
- Engineering phase and density of Bose-Einstein condensates in curved waveguides with toroidal topology
- Galilean invariance in confined quantum systems: Implications on spectral gaps, superfluid flow, and periodic order
- Metastable spin textures and Nambu-Goldstone modes of a ferromagnetic spin-1 Bose-Einstein condensate confined in a ring trap
- Landau Instability and soliton formation
- Dissipation in mesoscale superfluids
- Finite temperature expansion dynamics of Bose-Einstein condensates
- Ramifications of topology and thermal fluctuations in quasi-2D condensates
- Mixture of two unequally charged superfluids in a magnetic field
- Geometry-induced modification of fluctuation spectrum in quasi-two-dimensional condensates
- Influence of quantum fluctuations on the superfluid critical velocity of a one-dimensional Bose gas
- Theoretical description of atomtronic Josephson junctions in an optical lattice
- Increasing the stability of a superfluid in a rotating necklace potential
- Analytic Vortex Dynamics in an Annular Bose-Einstein Condensate
- A versatile ring trap for quantum gases