Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Persistent Currents in Toroidal Dipolar Supersolids

Nilsson Tengstrand, Mikael LU ; Boholm, David LU ; Sachdeva, Rashi LU orcid ; Bengtsson, Jakob LU and Reimann-Wacker, Stephanie M LU (2021) In Physical Review A 103.
Abstract
We investigate the rotational properties of a dipolar Bose-Einstein condensate trapped in a toroidal geometry. Studying the ground states in the rotating frame and at fixed angular momenta, we observe that the condensate acts in distinctly different ways depending on whether it is in the superfluid or in the supersolid phase. We find that intriguingly, the toroidal dipolar condensate can support a supersolid persistent current which occurs at a local minimum in the ground state energy as a function of angular momentum, where the state has a vortex solution in the superfluid component of the condensate. The decay of this state is prevented by a barrier that in part consists of states where a fraction of the condensate mimics solid-body... (More)
We investigate the rotational properties of a dipolar Bose-Einstein condensate trapped in a toroidal geometry. Studying the ground states in the rotating frame and at fixed angular momenta, we observe that the condensate acts in distinctly different ways depending on whether it is in the superfluid or in the supersolid phase. We find that intriguingly, the toroidal dipolar condensate can support a supersolid persistent current which occurs at a local minimum in the ground state energy as a function of angular momentum, where the state has a vortex solution in the superfluid component of the condensate. The decay of this state is prevented by a barrier that in part consists of states where a fraction of the condensate mimics solid-body rotation in a direction opposite to that of the vortex. Furthermore, the rotating toroidal supersolid shows hysteretic behavior that is qualitatively different depending on the superfluid fraction of the condensate. (Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
103
article number
013313
publisher
American Physical Society
external identifiers
  • scopus:85100133580
ISSN
2469-9926
DOI
10.1103/PhysRevA.103.013313
language
English
LU publication?
yes
id
9fdfe914-2828-4b4c-b6a5-e1ac5f577b44
alternative location
https://arxiv.org/abs/2003.06408
date added to LUP
2020-10-10 22:46:49
date last changed
2023-11-20 22:48:54
@article{9fdfe914-2828-4b4c-b6a5-e1ac5f577b44,
  abstract     = {{We investigate the rotational properties of a dipolar Bose-Einstein condensate trapped in a toroidal geometry. Studying the ground states in the rotating frame and at fixed angular momenta, we observe that the condensate acts in distinctly different ways depending on whether it is in the superfluid or in the supersolid phase. We find that intriguingly, the toroidal dipolar condensate can support a supersolid persistent current which occurs at a local minimum in the ground state energy as a function of angular momentum, where the state has a vortex solution in the superfluid component of the condensate. The decay of this state is prevented by a barrier that in part consists of states where a fraction of the condensate mimics solid-body rotation in a direction opposite to that of the vortex. Furthermore, the rotating toroidal supersolid shows hysteretic behavior that is qualitatively different depending on the superfluid fraction of the condensate.}},
  author       = {{Nilsson Tengstrand, Mikael and Boholm, David and Sachdeva, Rashi and Bengtsson, Jakob and Reimann-Wacker, Stephanie M}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Persistent Currents in Toroidal Dipolar Supersolids}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.103.013313}},
  doi          = {{10.1103/PhysRevA.103.013313}},
  volume       = {{103}},
  year         = {{2021}},
}