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Selective rotation and attractive persistent currents in antidipolar ring supersolids

Mukherjee, K. LU ; Cardinale, T. Arnone LU orcid and Reimann, S. M. LU (2025) In Physical Review A 111(3).
Abstract

A repulsively interacting Bose-Einstein condensate on a ring is well known to show persistent currents. For attractive interactions, however, a bound state may form that renders the rotation classical. Here we show that in a multiply connected confinement, the strong in-plane attraction of an antidipolar condensate can form stacks of ring-shaped density lumps which may coherently overlap to form a supersolid along the azimuthal symmetry axis of the system. Intriguingly, the functional behavior of the energy-angular-momentum dispersion of the antidipolar ring condensate differs from that of a usual repulsive superfluid. The periodic maxima between persistent flow and the nonrotating ground state flatten significantly and the typical... (More)

A repulsively interacting Bose-Einstein condensate on a ring is well known to show persistent currents. For attractive interactions, however, a bound state may form that renders the rotation classical. Here we show that in a multiply connected confinement, the strong in-plane attraction of an antidipolar condensate can form stacks of ring-shaped density lumps which may coherently overlap to form a supersolid along the azimuthal symmetry axis of the system. Intriguingly, the functional behavior of the energy-angular-momentum dispersion of the antidipolar ring condensate differs from that of a usual repulsive superfluid. The periodic maxima between persistent flow and the nonrotating ground state flatten significantly and the typical pronounced cusps in the energy dispersion also occur in the rotationally symmetric supersolid state. A weak link results in the reduction of this minimum, shifting it to smaller angular momenta. With an asymmetric link potential one can selectively induce superfluid and rigid-body rotation in different layers within the same system. This intriguing setup offers new perspectives for atomtronics applications.

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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
111
issue
3
article number
033304
publisher
American Physical Society
external identifiers
  • scopus:86000592271
ISSN
2469-9926
DOI
10.1103/PhysRevA.111.033304
language
English
LU publication?
yes
id
c124cc9b-d527-48b0-bd7f-c64f5722b16f
date added to LUP
2025-06-24 11:46:42
date last changed
2025-06-24 11:47:52
@article{c124cc9b-d527-48b0-bd7f-c64f5722b16f,
  abstract     = {{<p>A repulsively interacting Bose-Einstein condensate on a ring is well known to show persistent currents. For attractive interactions, however, a bound state may form that renders the rotation classical. Here we show that in a multiply connected confinement, the strong in-plane attraction of an antidipolar condensate can form stacks of ring-shaped density lumps which may coherently overlap to form a supersolid along the azimuthal symmetry axis of the system. Intriguingly, the functional behavior of the energy-angular-momentum dispersion of the antidipolar ring condensate differs from that of a usual repulsive superfluid. The periodic maxima between persistent flow and the nonrotating ground state flatten significantly and the typical pronounced cusps in the energy dispersion also occur in the rotationally symmetric supersolid state. A weak link results in the reduction of this minimum, shifting it to smaller angular momenta. With an asymmetric link potential one can selectively induce superfluid and rigid-body rotation in different layers within the same system. This intriguing setup offers new perspectives for atomtronics applications.</p>}},
  author       = {{Mukherjee, K. and Cardinale, T. Arnone and Reimann, S. M.}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  number       = {{3}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Selective rotation and attractive persistent currents in antidipolar ring supersolids}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.111.033304}},
  doi          = {{10.1103/PhysRevA.111.033304}},
  volume       = {{111}},
  year         = {{2025}},
}