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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2303.04158 |
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| _version_ | 1866913203609403392 |
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| author | Chou, Yang-Zhi Sau, Jay D. |
| author_facet | Chou, Yang-Zhi Sau, Jay D. |
| contents | 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 $ρ_s\sim T$ and sound velocity $v_s\sim T^{1/2}$, showing similar unconventional low-temperature slow dynamics to the symmetry-broken regime. Particularly, the superfluid stiffness suggests an order by disorder effect as $ρ_s$ increases with temperature. Our results pave the way for studying fractons in ultracold atom experiments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_04158 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constrained motions and slow dynamics in one-dimensional bosons with double-well dispersion Chou, Yang-Zhi Sau, Jay D. Quantum Gases Statistical Mechanics Strongly Correlated Electrons 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 $ρ_s\sim T$ and sound velocity $v_s\sim T^{1/2}$, showing similar unconventional low-temperature slow dynamics to the symmetry-broken regime. Particularly, the superfluid stiffness suggests an order by disorder effect as $ρ_s$ increases with temperature. Our results pave the way for studying fractons in ultracold atom experiments. |
| title | Constrained motions and slow dynamics in one-dimensional bosons with double-well dispersion |
| topic | Quantum Gases Statistical Mechanics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2303.04158 |