Observation of supersolid-like sound modes in a driven quantum gas

Abstract

Driven systems are of fundamental scientific interest, as they can exhibit properties that are radically different from the same system at equilibrium. In certain cases, long-lived states of driven matter can emerge, which exhibit new material properties. In this work, we probe the excitation spectrum of an emergent patterned state in a driven superfluid, finding that its response is identical to that of a one-dimensional supersolid. In order to extract physical quantities that parametrize the observed sound modes, we apply an effective hydrodynamic theory of superfluid smectics, which is agnostic to microscopic processes. We therefore use the conceptual framework of supersolids to characterize an otherwise dynamic and far-from-equilibrium state.

11 pages, 8 figures

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Cited by in corpus (6)

• Signatures of rigidity and second sound in dipolar supersolids
• Steady-states and response functions of the periodically driven O(N) scalar field theory
• Single-fluid model for rotating annular supersolids and its experimental implications
• Superfluid Fraction of a 2D Bose-Einstein Condensate in a Triangular Lattice
• Excitations and anisotropic sound in planar dipolar supersolids with tilted dipoles
• Parametric Resonance in the Non-Autonomous Sine-Gordon Model