Ergodicity Breaking Under Confinement in Cold-Atom Quantum Simulators
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| author | Desaules, Jean-Yves Su, Guo-Xian McCulloch, Ian P. Yang, Bing Papić, Zlatko Halimeh, Jad C. |
| author_facet | Desaules, Jean-Yves Su, Guo-Xian McCulloch, Ian P. Yang, Bing Papić, Zlatko Halimeh, Jad C. |
| contents | The quantum simulation of gauge theories on synthetic quantum matter devices has gained a lot of traction in the last decade, making possible the observation of a range of exotic quantum many-body phenomena. In this work, we consider the spin-$1/2$ quantum link formulation of $1+1$D quantum electrodynamics with a topological $θ$-angle, which can be used to tune a confinement-deconfinement transition. Exactly mapping this system onto a PXP model with mass and staggered magnetization terms, we show an intriguing interplay between confinement and the ergodicity-breaking paradigms of quantum many-body scarring and Hilbert-space fragmentation. We map out the rich dynamical phase diagram of this model, finding an ergodic phase at small values of the mass $μ$ and confining potential $χ$, an emergent integrable phase for large $μ$, and a fragmented phase for large values of both parameters. We also show that the latter hosts resonances that lead to a vast array of effective models. We propose experimental probes of our findings, which can be directly accessed in current cold-atom setups. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2301_07717 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Ergodicity Breaking Under Confinement in Cold-Atom Quantum Simulators Desaules, Jean-Yves Su, Guo-Xian McCulloch, Ian P. Yang, Bing Papić, Zlatko Halimeh, Jad C. Quantum Gases Strongly Correlated Electrons High Energy Physics - Lattice Quantum Physics The quantum simulation of gauge theories on synthetic quantum matter devices has gained a lot of traction in the last decade, making possible the observation of a range of exotic quantum many-body phenomena. In this work, we consider the spin-$1/2$ quantum link formulation of $1+1$D quantum electrodynamics with a topological $θ$-angle, which can be used to tune a confinement-deconfinement transition. Exactly mapping this system onto a PXP model with mass and staggered magnetization terms, we show an intriguing interplay between confinement and the ergodicity-breaking paradigms of quantum many-body scarring and Hilbert-space fragmentation. We map out the rich dynamical phase diagram of this model, finding an ergodic phase at small values of the mass $μ$ and confining potential $χ$, an emergent integrable phase for large $μ$, and a fragmented phase for large values of both parameters. We also show that the latter hosts resonances that lead to a vast array of effective models. We propose experimental probes of our findings, which can be directly accessed in current cold-atom setups. |
| title | Ergodicity Breaking Under Confinement in Cold-Atom Quantum Simulators |
| topic | Quantum Gases Strongly Correlated Electrons High Energy Physics - Lattice Quantum Physics |
| url | https://arxiv.org/abs/2301.07717 |