Toroidal Dipolar Supersolid with a Rotating Weak Link

Abstract

Ring-shaped superfluids with weak links provide a perfect environment for studying persistent currents and dynamic stirring protocols. Here, we investigate the effects of a weak-link system on dipolar supersolids. By calculating the ground state energy at fixed angular momenta, we find that metastable persistent currents may exist in the supersolid phase near the superfluid transition point. When stirring the weak link rapidly enough, we show that vortices can enter the supersolid. These vortex entries cause phase slips, emitting solitonic excitations that interfere with the crystalline structure of the supersolid, leading to a continuous melting and recrystallization of the droplets. Finally, we examine the release of vortex-carrying supersolids from the trap, observing that the released density exhibits a discrete structure associated with the density modulation and a central hole resulting from the vortex core.

7 pages, 7 figures

References in corpus (14)

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• Supersolid formation in a quantum gas breaking continuous translational symmetry
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• Long-lived and transient supersolid behaviors in dipolar quantum gases
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• Lindemann melting criterion in two dimensions
• Critical Rotation of an Annular Superfluid Bose Gas
• Vortex excitation in a stirred toroidal Bose-Einstein condensate
• Vortex Dynamics in an Annular Bose-Einstein Condensate
• Mixed Bubbles in a one-dimensional Bose-Bose mixture
• Classical linear chain behavior from dipolar droplets to supersolids

Cited by in corpus (12)

• Vortices in dipolar Bose-Einstein condensates
• Decoupled sound and amplitude modes in trapped dipolar supersolids
• Excitations of a binary dipolar supersolid
• Tunneling dynamics of ${}^{164}$Dy supersolids and droplets
• Supersolid spectroscopy
• Anomalous dispersion of shear waves in dipolar supersolids
• Kibble-Zurek scaling of the superfluid-supersolid transition in an elongated dipolar gas
• 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
• Bi-Josephson Effect in a Driven-Dissipative Supersolid
• Vorticity-Crystalline Order Coupling in Supersolids: Excitations and Re-entrant Phases