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Self-bound supersolid stripe phase in binary Bose-Einstein condensates

Sachdeva, Rashi LU orcid ; Nilsson Tengstrand, Mikael LU and Reimann, Stephanie M LU (2020) In Physical Review A 102.
Abstract
Supersolidity—a coexistence of superfluidity and crystalline or amorphous density variations—has been vividly debated ever since its conjecture. While the initial focus was on helium-4, recent experiments uncovered supersolidity in ultracold dipolar quantum gases. Here we propose a self-bound supersolid phase in a binary mixture of Bose gases with short-range interactions, making use of the nontrivial properties of spin-orbit coupling. We find that a first-order phase transition from a self-bound supersolid stripe phase to a zero-minimum droplet state of the Bose gas occurs as a function of the Rabi coupling strength. These phases are characterized using the momentum distribution, the transverse spin polarization, and the superfluid... (More)
Supersolidity—a coexistence of superfluidity and crystalline or amorphous density variations—has been vividly debated ever since its conjecture. While the initial focus was on helium-4, recent experiments uncovered supersolidity in ultracold dipolar quantum gases. Here we propose a self-bound supersolid phase in a binary mixture of Bose gases with short-range interactions, making use of the nontrivial properties of spin-orbit coupling. We find that a first-order phase transition from a self-bound supersolid stripe phase to a zero-minimum droplet state of the Bose gas occurs as a function of the Rabi coupling strength. These phases are characterized using the momentum distribution, the transverse spin polarization, and the superfluid fraction. The critical point of the transition is estimated in an analytical framework. The predicted density-modulated supersolid stripe and zero-minimum droplet phase should be experimentally observable in a binary mixture of 39K with spin-orbit coupling. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
102
article number
043304
pages
5 pages
publisher
American Physical Society
external identifiers
  • scopus:85093364386
ISSN
2469-9926
DOI
10.1103/PhysRevA.102.043304
language
English
LU publication?
yes
id
68e163b0-c050-4c0c-a9fe-f16fa7643e60
date added to LUP
2020-09-24 20:45:52
date last changed
2023-11-20 11:20:34
@article{68e163b0-c050-4c0c-a9fe-f16fa7643e60,
  abstract     = {{Supersolidity—a coexistence of superfluidity and crystalline or amorphous density variations—has been vividly debated ever since its conjecture. While the initial focus was on helium-4, recent experiments uncovered supersolidity in ultracold dipolar quantum gases. Here we propose a self-bound supersolid phase in a binary mixture of Bose gases with short-range interactions, making use of the nontrivial properties of spin-orbit coupling. We find that a first-order phase transition from a self-bound supersolid stripe phase to a zero-minimum droplet state of the Bose gas occurs as a function of the Rabi coupling strength. These phases are characterized using the momentum distribution, the transverse spin polarization, and the superfluid fraction. The critical point of the transition is estimated in an analytical framework. The predicted density-modulated supersolid stripe and zero-minimum droplet phase should be experimentally observable in a binary mixture of 39K with spin-orbit coupling.}},
  author       = {{Sachdeva, Rashi and Nilsson Tengstrand, Mikael and Reimann, Stephanie M}},
  issn         = {{2469-9926}},
  language     = {{eng}},
  month        = {{10}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review A}},
  title        = {{Self-bound supersolid stripe phase in binary Bose-Einstein condensates}},
  url          = {{http://dx.doi.org/10.1103/PhysRevA.102.043304}},
  doi          = {{10.1103/PhysRevA.102.043304}},
  volume       = {{102}},
  year         = {{2020}},
}