Sound, superfluidity and layer compressibility in a ring dipolar supersolid

Abstract

We propose a protocol to excite the Goldstone modes of a supersolid dipolar Bose-Einstein condensed gas confined in a ring geometry. By abruptly removing an applied periodic modulation proportional to cos($\phi$), where $\phi$ is the azimuthal angle, we explore the resulting oscillations of the gas, by solving the extended Gross-Pitaevskii equation. The value of the two longitudinal sound velocities exhibited in the supersolid phase are analyzed using the hydrodynamic theory of supersolids at zero temperature. This approach allows for the determination of the layer compressibility modulus as well as of the superfluid fraction $f_S$, in agreement with the Leggett estimate of the non-classical moment of inertia.

References in corpus (34)

• Roton-maxon spectrum and stability of trapped dipolar condensates
• Macroscopically ordered state in exciton system
• Quantum filaments in dipolar Bose-Einstein condensates
• Supersolid symmetry breaking from compressional oscillations in a dipolar quantum gas
• The low-energy Goldstone mode in a trapped dipolar supersolid
• Excitation spectrum of a trapped dipolar supersolid and its experimental evidence
• Roadmap on Atomtronics: State of the art and perspective
• Atomtronic circuits: from many-body physics to quantum technologies
• Excitation spectrum of a supersolid
• Probing the roton excitation spectrum of a stable dipolar Bose gas
• Supersolid behaviour of a dipolar Bose-Einstein condensate confined in a tube
• Elementary excitations of ultracold soft-core bosons across the superfluid-supersolid phase transition
• Effective Lagrangian and Topological Interactions in Supersolids
• Ferrofluidity in a two-component dipolar Bose-Einstein Condensate
• Coexisting ordinary elasticity and superfluidity in a model of defect-free supersolid
• Density oscillations in trapped dipolar condensates
• Minimally destructive, Doppler measurement of a quantized, superfluid flow
• Supersolidity in ultra-cold dipolar gases
• Persistent Currents in Toroidal Dipolar Supersolids
• Superfluid fraction in an interacting spatially modulated Bose-Einstein condensate
• Alternating-domain supersolids in binary dipolar condensates
• Supersolidity and crystallization of a dipolar Bose gas in an infinite tube
• Coherently Coupled Mixtures of Bose-Einstein Condensed Gases
• Catalyzation of supersolidity in binary dipolar condensates
• Supersolid structure and excitation spectrum of soft-core bosons in 3D
• Second sound and the density response function in uniform superfluid atomic gases
• Supersolid edge and bulk phases of a dipolar quantum gas in a box
• Observation of anisotropic superfluid density in an artificial crystal
• Hydrodynamic theory of supersolids: Variational principle and effective Lagrangian
• Hydrodynamics of a superfluid smectic
• Fragmented-condensate solid of dipolar excitons
• Compressibility and speeds of sound across the superfluid to supersolid phase transition of an elongated dipolar gas
• Tuning photon-mediated interactions in a multimode cavity: from supersolid to insulating droplets hosting phononic excitations
• Bose-Einstein condensates with Raman-induced spin-orbit coupling : An overview

Cited by in corpus (23)

• Excitations of a two-dimensional supersolid
• Excitations of a binary dipolar supersolid
• Decoupled sound and amplitude modes in trapped dipolar supersolids
• Observation of supersolid-like sound modes in a driven quantum gas
• Sounds waves and fluctuations in one-dimensional supersolids
• Supersolid spectroscopy
• Honeycomb supersolid -- Dirac points and shear-instability induced crystal transitions
• Superfluid fraction of interacting bosonic gases
• Signatures of rigidity and second sound in dipolar supersolids
• Anomalous Doppler effect in superfluid and supersolid atomic gases
• Josephson vortices and persistent current in a double-ring supersolid system
• Emergent Spin Supersolids in Frustrated Quantum Materials
• From elastic to inelastic deformation of a dipolar supersolid
• Single-fluid model for rotating annular supersolids and its experimental implications
• Increasing the stability of a superfluid in a rotating necklace potential
• Probing Superfluidity with Quantum Vortex Necklaces
• Dissipationless dynamics of spin supersolid states in a spin-1/2 triangular antiferromagnet with impurities
• Strongly dipolar molecular Bose-Einstein condensates: From few- to many-body physics
• Vorticity-Crystalline Order Coupling in Supersolids: Excitations and Re-entrant Phases
• Optical response of the supersolid polaron
• Excitations and anisotropic sound in planar dipolar supersolids with tilted dipoles
• Anomalous Doppler effect in two-component Bose-Einstein condensates
• Dynamical signatures of superfluidity and shear rigidity in different phases of a dipolar Bose-Einstein condensate