Detection of roton and phonon excitations in a spin-orbit coupled Bose-Einstein condensate with a moving barrier
arXiv:2204.09865 · doi:10.1103/PhysRevA.106.013302
Abstract
We propose to detect phonon and roton excitations in a two-dimensional Bose-Einstein condensate with Raman-induced spin-orbit coupling by perturbing the atomic cloud with a weak barrier. The two excitation modes can be observed by moving the barrier along different directions in appropriate parameter regimes. Phonon excitations are identified by the appearance of solitary waves, while roton excitations lead to distinctive spatial density modulations. We show that this method can also be used to determine the anisotropic critical velocities of superfluid.
arXiv comment7 pages, 5 figures
References in corpus (38)
- Theory of Bose-Einstein condensation in trapped gases
- A spin-orbit coupled Bose-Einstein condensate
- Light-induced gauge fields for ultracold atoms
- Spin-Orbit Coupled Degenerate Fermi Gases
- Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
- Realization of Two-Dimensional Spin-orbit Coupling for Bose-Einstein Condensates
- Degenerate Quantum Gases with Spin-Orbit Coupling
- Observation of the supersolid stripe phase in spin-orbit coupled Bose-Einstein condensates
- 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
- Quantum tri-criticality and phase transitions in spin-orbit coupled Bose-Einstein condensates
- Observation of vortex dipoles in an oblate Bose-Einstein condensate
- Observation of Superfluid Flow in a Bose-Einstein Condensed Gas
- Observation of Roton Mode Population in a Dipolar Quantum Gas
- Stationary and non-stationary fluid flow of a Bose-Einstein condensate through a penetrable barrier
- Superfluid behaviour of a two-dimensional Bose gas
- Anisotropic dynamics of a spin-orbit coupled Bose-Einstein condensate
- Softening of Roton and Phonon Modes in a Bose-Einstein Condensate with Spin-Orbit Coupling
- Itinerant magnetism in spin-orbit coupled Bose gases
- Anisotropic superfluidity in a dipolar Bose gas
- Negative mass hydrodynamics in a Spin-Orbit--Coupled Bose-Einstein Condensate
- Roton-Maxon Excitation Spectrum of Bose Condensates in a Shaken Optical Lattice
- Measurement of collective excitations in a spin-orbit-coupled Bose-Einstein condensate
- Exotic superfluidity in spin-orbit coupled Bose-Einstein condensates
- The critical velocity in the BEC-BCS crossover
- Critical Velocity of Superfluid Flow past Large Obstacles in Bose-Condensates
- Critical superfluid velocity in a trapped dipolar gas
- Anisotropic Superfluid Behavior of a Dipolar Bose-Einstein Condensate
- Probing superfluidity of Bose-Einstein condensates via laser stirring
- Momentum-Space Josephson Effects
- Moving obstacle potential in a spin-orbit-coupled Bose-Einstein condensate
- Experimental realization of a non-magnetic one-way spin switch
- Drag force on a moving impurity in a spin-orbit coupled Bose-Einstein condensate
- Landau's criterion for an anisotropic Bose-Einstein condensate
- Critical Energy Dissipation in a Binary Superfluid Gas by a Moving Magnetic Obstacle
- Dynamical spin-density waves in a spin-orbit-coupled Bose-Einstein condensate
- Spin-orbit coupled spin-1 Bose-Einstein condensate flow past an obstacle in the presence of a Zeeman field
- Superfluidity of a Raman spin-orbit-coupled Bose gas at finite temperature