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Decoupled sound and amplitude modes in trapped dipolar supersolids

Hertkorn, J. ; Stürmer, P. LU ; Mukherjee, K. LU ; Ng, K. S.H. ; Uerlings, P. ; Hellstern, F. ; Lavoine, L. ; Reimann, S. M. LU ; Pfau, T. and Klemt, R. (2024) In Physical Review Research 6(4).
Abstract

We theoretically investigate elementary excitations of dipolar quantum gases across the superfluid to supersolid phase transition in a toroidal trap. We show how decoupled first sound, second sound, and Higgs modes emerge by following their origin from superfluid modes across the transition. The structure of these excitations reveals the interplay between crystal and superfluid oscillations. Our results unify previous notions of coupled Goldstone and Higgs modes in harmonic traps, allowing us to establish a correspondence between excitations of trapped and infinitely extended supersolids. We propose protocols for selectively probing these sound and amplitude modes, accessible to state-of-the-art experiments.

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author
; ; ; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Research
volume
6
issue
4
article number
L042056
publisher
American Physical Society
external identifiers
  • scopus:85214311384
ISSN
2643-1564
DOI
10.1103/PhysRevResearch.6.L042056
language
English
LU publication?
yes
id
ce3486ef-75f8-43c1-8e44-19c4a78f55d3
date added to LUP
2025-02-26 11:03:17
date last changed
2025-04-04 13:52:35
@article{ce3486ef-75f8-43c1-8e44-19c4a78f55d3,
  abstract     = {{<p>We theoretically investigate elementary excitations of dipolar quantum gases across the superfluid to supersolid phase transition in a toroidal trap. We show how decoupled first sound, second sound, and Higgs modes emerge by following their origin from superfluid modes across the transition. The structure of these excitations reveals the interplay between crystal and superfluid oscillations. Our results unify previous notions of coupled Goldstone and Higgs modes in harmonic traps, allowing us to establish a correspondence between excitations of trapped and infinitely extended supersolids. We propose protocols for selectively probing these sound and amplitude modes, accessible to state-of-the-art experiments.</p>}},
  author       = {{Hertkorn, J. and Stürmer, P. and Mukherjee, K. and Ng, K. S.H. and Uerlings, P. and Hellstern, F. and Lavoine, L. and Reimann, S. M. and Pfau, T. and Klemt, R.}},
  issn         = {{2643-1564}},
  language     = {{eng}},
  number       = {{4}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Research}},
  title        = {{Decoupled sound and amplitude modes in trapped dipolar supersolids}},
  url          = {{http://dx.doi.org/10.1103/PhysRevResearch.6.L042056}},
  doi          = {{10.1103/PhysRevResearch.6.L042056}},
  volume       = {{6}},
  year         = {{2024}},
}