Observation of Two Sound Modes in a Binary Superfluid Gas
arXiv:1907.10289 · doi:10.1103/PhysRevA.101.061601
Abstract
We study the propagation of sound waves in a binary superfluid gas with two symmetric components. The binary superfluid is constituted using a Bose-Einstein condensate of Na in an equal mixture of two hyperfine ground states. Sound waves are excited in the condensate by applying a local spin-dependent perturbation with a focused laser beam. We identify two distinct sound modes, referred to as density sound and spin sound, where the densities of the two spin components oscillate in phase and out of phase, respectively. The observed sound propagation is explained well by the two-fluid hydrodynamics of the binary superfluid. The ratio of the two sound velocities is precisely measured with no need for absolute density calibration, and we find it in quantitatively good agreement with known interaction properties of the binary system.
arXiv comment5 pages, 4 figures
References in corpus (35)
- Spin domains in ground state spinor Bose-Einstein condensates
- Spinor Bose-Einstein condensates
- Quantum liquid droplets in a mixture of Bose-Einstein condensates
- A two atomic species superfluid
- Observation of Half Quantum Vortices in an Exciton-Polariton Condensate
- Resonant control of spin dynamics in ultracold quantum gases by microwave dressing
- Dynamics of Bose condensed gases in highly deformed traps
- Observation of Topologically Stable 2D Skyrmions in an Antiferromagnetic Spinor Bose-Einstein Condensate
- Feshbach spectroscopy and analysis of the interaction potentials of ultracold sodium
- Sound propagation in a cylindrical Bose-condensed gas
- A review of two-band superconductivity: materials and effects on the thermodynamic and reversible mixed-state properties
- Half-Quantum Vortices in an Antiferromagnetic Spinor Bose-Einstein Condensate
- Sound propagation in a uniform superfluid two-dimensional Bose gas
- Magnetic Solitons in a Binary Bose-Einstein Condensate
- The critical velocity in the BEC-BCS crossover
- Critical Velocity and Dissipation of an ultracold Bose-Fermi Counterflow
- Quantized conductance through a spin-selective atomic point contact
- Dynamics in spinor condensates controlled by a microwave dressing field
- Observation of Spin Superfluidity in a Bose Gas Mixture
- Bogoliubov Theory and Lee-Huang-Yang Corrections in Spin-1 and Spin-2 Bose-Einstein Condensates in the Presence of the Quadratic Zeeman Effect
- Sound propagation in a Bose-Einstein condensate at finite temperatures
- Non-dissipative drag of superflow in a two-component Bose gas
- Andreev-Bashkin effect in superfluid cold gases mixture
- Collisional Dynamics of Half-Quantum Vortices in a Spinor Bose-Einstein Condensate
- Nonlinear waves of polarization in two-component Bose-Einstein condensates
- Critical spin superflow in a spinor Bose-Einstein condensate
- Critical Vortex Shedding in a Strongly Interacting Fermionic Superfluid
- Effective interactions in a quantum Bose-Bose mixture
- Spin dynamics and Andreev-Bashkin effect in mixtures of one-dimensional Bose gases
- Coupled superfluidity of binary Bose mixtures in two dimensions
- Landau versus Spin Superfluidity in Spinor Bose-Einstein Condensates
- Dynamical spin-density waves in a spin-orbit-coupled Bose-Einstein condensate
- Two-component superfluid hydrodynamics of neutron star cores
- Metastable hard-axis polar state of a spinor Bose-Einstein condensate under a magnetic field gradient
- Simple waves in a two-component Bose-Einstein condensate
Cited by in corpus (32)
- Magnetic solitons in a spin-1 Bose-Einstein condensate
- Beyond Lee-Huang-Yang description of self-bound Bose mixtures
- Dynamics of massive point vortices in binary mixture of Bose-Einstein condensates
- Observation of Massless and Massive Collective Excitations with Faraday Patterns in a Two-Component Superfluid
- Quantum mixtures of ultracold gases of neutral atoms
- Defect Saturation in a Rapidly Quenched Bose Gas
- Thermodynamics of dilute Bose gases: Beyond mean-field theory for binary mixtures of Bose-Einstein condensate
- Vortex shedding frequency of a moving obstacle in a Bose-Einstein condensate
- Decay of two-dimensional quantum turbulence in binary Bose-Einstein condensates
- Minimum critical velocity of a Gaussian obstacle in a Bose-Einstein condensate
- Condensation and thermalization of an easy-plane ferromagnet in a spinor Bose gas
- Collisionless drag for a one-dimensional two-component Bose-Hubbard model
- Vortex formation and quantum turbulence with rotating paddle potentials in a two-dimensional binary Bose-Einstein condensate
- Critical Energy Dissipation in a Binary Superfluid Gas by a Moving Magnetic Obstacle
- Linear response study of collisionless spin drag
- Berezinskii-Kosterlitz-Thouless phase transition with Rabi-coupled bosons
- Miscibility regimes in a Na-K quantum mixture
- Self-consistent theory of a homogeneous binary Bose mixture with strong repulsive interspecies interaction
- Analogous Hawking radiation from gapped excitations in a transonic flow of binary Bose-Einstein condensates
- Spin and Density Modes in a Binary Fluid of Light
- The cross-over from Townes solitons to droplets in a 2D Bose mixture
- Spin conductivity spectrum and spin superfluidity in a binary Bose mixture
- Half-quantum vortex generation in a two-component Bose-Einstein condensate by an oscillatory magnetic obstacle
- Hydrodynamic generation of skyrmions in a two-component Bose-Einstein condensate
- Spin and mass currents near a moving magnetic obstacle in a two-component Bose-Einstein condensate
- Magnetoroton in a two-dimensional Bose-Bose mixture
- Hugenholtz -- Pines relations and the critical temperature of a Rabi coupled binary Bose system
- Phase separation and metastability in a mixture of spin-1 and spin-2 Bose-Einstein condensates
- Anomalous Doppler effect in two-component Bose-Einstein condensates
- Critical speed of a binary superfluid of light
- Emergent aperiodicity in Bose-Bose mixtures induced by spin-dependent periodic potentials
- Vortices in Andreev-Bashkin Superfluids