Constrained motions and slow dynamics in one-dimensional bosons with double-well dispersion
arXiv:2303.04158 · doi:10.1103/PhysRevLett.132.046001
Abstract
We demonstrate slow dynamics and constrained motion of domain walls in one-dimensional (1D) interacting bosons with double-well dispersion. In the symmetry-broken regime, the domain-wall motion is ``fractonlike'' -- a single domain wall cannot move freely, while two nearby domain walls can move collectively. Consequently, we find an Ohmic-like linear response and a vanishing superfluid stiffness, which are atypical for a Bose condensate in a 1D translation invariant closed quantum system. Near Lifshitz quantum critical point, we obtain superfluid stiffness and sound velocity , showing similar unconventional low-temperature slow dynamics to the symmetry-broken regime. Particularly, the superfluid stiffness suggests an order by disorder effect as increases with temperature. Our results pave the way for studying fractons in ultracold atom experiments.
arXiv comment7+6 pages, 3+1 figures. Published version
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