Two-dimensional supersolidity in a planar dipolar Bose gas
arXiv:2308.16416 · doi:10.1103/PhysRevA.108.053321
Abstract
We investigate the crystalline stationary states of a dipolar Bose-Einstein condensate in a planar trapping geometry. Our focus is on the ground state phase diagram in the thermodynamic limit, where triangular, honeycomb and stripe phases occur. We quantify the superfluid fraction by calculating the non-classical translational inertia, which allows us to identify favorable parameter regimes for observing supersolid ground states. We develop two simplified theories to approximately describe the ground states, and consider the relationship to roton softening in the uniform ground state. This also allows us to extend the phase diagram to the low density regime. While the triangular and honeycomb states have an isotropic superfluid response tensor, the stripe state exhibits anisotropic superfluidity.
10 pages, 8 figures
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- Superfluid fraction of interacting bosonic gases
- Kibble-Zurek scaling of the superfluid-supersolid transition in an elongated dipolar gas
- Anomalous dispersion of shear waves in dipolar supersolids
- Honeycomb supersolid -- Dirac points and shear-instability induced crystal transitions
- Density-wave-type supersolid of two-dimensional tilted dipolar bosons
- Signatures of rigidity and second sound in dipolar supersolids
- Unveiling Supersolid Order via Vortex Trajectory Correlations
- From elastic to inelastic deformation of a dipolar supersolid
- Creating and melting a supersolid by heating a quantum dipolar system
- Short-wavelength mesophases in the ground states of core-softened particles in two-dimensions
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- Positive-density ground states of the Gross-Pitaevskii equation
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- Dynamical signatures of superfluidity and shear rigidity in different phases of a dipolar Bose-Einstein condensate
- Generation of wave turbulence in dipolar gases driven across their phase transitions