Rotating a Supersolid Dipolar Gas

S. M. Roccuzzo, A. Gallemí, A. Recati, and S. Stringari
Phys. Rev. Lett. 124, 045702 – Published 31 January 2020

Abstract

Distinctive features of supersolids show up in their rotational properties. We calculate the moment of inertia of a harmonically trapped dipolar Bose-Einstein condensed gas as a function of the tunable scattering length parameter, providing the transition from the (fully) superfluid to the supersolid phase and eventually to an incoherent crystal of self-bound droplets. The transition from the superfluid to the supersolid phase is characterized by a jump in the moment of inertia, revealing its first order nature. In the case of elongated trapping in the plane of rotation, we show that the moment of inertia determines the value of the frequency of the scissors mode, which is significantly affected by the reduction of superfluidity in the supersolid phase. The case of an in-plane isotropic trapping is instead well suited to study the formation of quantized vortices, which are shown to be characterized, in the supersolid phase, by a sizeable deformed core, caused by the presence of the surrounding density peaks.

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  • Received 18 October 2019

DOI:https://doi.org/10.1103/PhysRevLett.124.045702

© 2020 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & Optical

Authors & Affiliations

S. M. Roccuzzo, A. Gallemí, A. Recati*, and S. Stringari

  • INO-CNR BEC Center and Dipartimento di Fisica, Università degli Studi di Trento, 38123 Povo, Italy and Trento Institute for Fundamental Physics and Applications, INFN, 38123 Trento, Italy

  • *Corresponding author. alessio.recati@ino.it

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Issue

Vol. 124, Iss. 4 — 31 January 2020

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