Drag force and superfluidity in the supersolid stripe phase of a spin-orbit-coupled Bose-Einstein condensate
arXiv:1805.12552 · doi:10.1134/S1063776118110146
Abstract
The phase diagram of a spin-orbit-coupled two-component Bose gas includes a supersolid stripe phase, which is featuring density modulations along the direction of the spin-orbit coupling. This phase has been recently found experimentally [J.~Li \textit{et al.}, Nature (London) \textbf{543}, 91 (2017)]. In the present work we characterize the superfluid behavior of the stripe phase by calculating the drag force acting on a moving impurity. Because of the gapless band structure of the excitation spectrum, the Landau critical velocity vanishes if the motion is not strictly parallel to the stripes, and energy dissipation takes place at any speed. Moreover, due to the spin-orbit coupling, the drag force can develop a component perpendicular to the velocity of the impurity. Finally, by estimating the time over which the energy dissipation occurs, we find that for slow impurities the effects of friction are negligible on a time scale up to several seconds, which is comparable with the duration of a typical experiment.
arXiv comment16 pages, 3 figures, published in the Journal of Experimental and Theoretical Physics (JETP) special issue in honor of L.P. Pitaevskii's 85th birthday
References in corpus (42)
- A spin-orbit coupled Bose-Einstein condensate
- Spin-orbit coupling in quantum gases
- Degenerate Quantum Gases with Spin-Orbit Coupling
- Spin-Orbit Coupled Spinor Bose-Einstein Condensates
- Observation of the supersolid stripe phase in spin-orbit coupled Bose-Einstein condensates
- Supersolid formation in a quantum gas breaking continuous translational symmetry
- Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
- Three-dimensional Roton-Excitations and Supersolid formation in Rydberg-excited Bose-Einstein Condensates
- Quantum tri-criticality and phase transitions in spin-orbit coupled Bose-Einstein condensates
- Supersolids: what and where are they ?
- Unconventional Bose-Einstein condensations from spin-orbit coupling
- Motion of a heavy impurity through a Bose-Einstein condensate
- A superfluid-droplet crystal and a free-space supersolid in a dipole-blockaded gas
- Superstripes and the excitation spectrum of a spin-orbit-coupled Bose-Einstein condensate
- Quantum phase transition in a two-dimensional system of dipoles
- Anisotropic dynamics of a spin-orbit coupled Bose-Einstein condensate
- Unconventional states of bosons with synthetic spin-orbit coupling
- Softening of Roton and Phonon Modes in a Bose-Einstein Condensate with Spin-Orbit Coupling
- Excitation spectrum of a supersolid
- Stable dilute supersolid of two-dimensional dipolar bosons
- Elementary excitations of ultracold soft-core bosons across the superfluid-supersolid phase transition
- Properties of Bose Gases with Raman-Induced Spin-Orbit Coupling
- Spin-Orbit Coupling and Spin Textures in Optical Superlattices
- Measurement of collective excitations in a spin-orbit-coupled Bose-Einstein condensate
- Exotic superfluidity in spin-orbit coupled Bose-Einstein condensates
- Superfluidity vs Bose-Einstein condensation in a Bose gas with disorder
- Tricriticalities and Quantum Phases in Spin-Orbit-Coupled Spin- Bose Gases
- Approach for making visible and stable stripes in a spin-orbit-coupled Bose-Einstein superfluid
- Interacting spin-orbit-coupled spin-1 Bose-Einstein condensates
- Supercurrent and dynamical instability of spin-orbit-coupled ultracold Bose gases
- Mean-field and stability analysis of two-dimensional flowing soft-core bosons modeling a supersolid
- Phase diagram of soft-core bosons in two dimensions
- Phase transitions and elementary excitations in spin-1 Bose gases with Raman-induced spin-orbit coupling
- Searching for Supersolidity in Ultracold Atomic Bose Condensates with Rashba Spin-Orbit Coupling
- Bose-Einstein condensation with spin-orbit coupling
- Quantum depletion and superfluid density of a supersolid in Raman spin-orbit coupled Bose gases
- Quasiequilibrium supersolid phase of a two-dimensional dipolar crystal
- Moving obstacle potential in a spin-orbit-coupled Bose-Einstein condensate
- Visibility and stability of superstripes in a spin-orbit-coupled Bose-Einstein condensate
- Drag force on a moving impurity in a spin-orbit coupled Bose-Einstein condensate
- Landau's criterion for an anisotropic Bose-Einstein condensate
- Motion of an Impurity in a Bose-Einstein Condensate with Weyl Spin-Orbit Coupling: Non-collinear Drag Force and Anisotropic Critical Velocity
Cited by in corpus (5)
- Supersolidity of cnoidal waves in an ultracold Bose gas
- Supersolid Striped Droplets in a Raman Spin-Orbit-Coupled System
- Bose-Einstein condensates with Raman-induced spin-orbit coupling : An overview
- Master's Thesis: Excitation Spectrum of a Weakly Interacting Spin-Orbit Coupled Bose-Einstein Condensate
- Supersolid phase of a spin-orbit-coupled Bose-Einstein condensate: a perturbation approach