Magnetism in the two-dimensional dipolar XY model
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866911837569679360 |
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| author | Sbierski, Björn Bintz, Marcus Chatterjee, Shubhayu Schuler, Michael Yao, Norman Y. Pollet, Lode |
| author_facet | Sbierski, Björn Bintz, Marcus Chatterjee, Shubhayu Schuler, Michael Yao, Norman Y. Pollet, Lode |
| contents | Motivated by a recent experiment on a square-lattice Rydberg atom array realizing a long-range dipolar XY model [Chen et al., Nature (2023)], we numerically study the model's equilibrium properties. We obtain the phase diagram, critical properties, entropies, variance of the magnetization, and site-resolved correlation functions. We consider both ferromagnetic and antiferromagnetic interactions and apply quantum Monte Carlo and pseudo-Majorana functional renormalization group techniques, generalizing the latter to a U(1) symmetric setting. Our simulations perform extensive thermometry for the first time in dipolar Rydberg atom arrays and establish conditions for adiabaticity and thermodynamic equilibrium. On the ferromagnetic side of the experiment, we determine the entropy per particle S/N~0.5, close to the one at the critical temperature, S_c/N = 0.585(15). The simulations suggest the presence of an out-of-equilibrium plateau at large distances in the correlation function, thus motivating future studies on the non-equilibrium dynamics of the system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_03673 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Magnetism in the two-dimensional dipolar XY model Sbierski, Björn Bintz, Marcus Chatterjee, Shubhayu Schuler, Michael Yao, Norman Y. Pollet, Lode Quantum Gases Strongly Correlated Electrons Atomic Physics Motivated by a recent experiment on a square-lattice Rydberg atom array realizing a long-range dipolar XY model [Chen et al., Nature (2023)], we numerically study the model's equilibrium properties. We obtain the phase diagram, critical properties, entropies, variance of the magnetization, and site-resolved correlation functions. We consider both ferromagnetic and antiferromagnetic interactions and apply quantum Monte Carlo and pseudo-Majorana functional renormalization group techniques, generalizing the latter to a U(1) symmetric setting. Our simulations perform extensive thermometry for the first time in dipolar Rydberg atom arrays and establish conditions for adiabaticity and thermodynamic equilibrium. On the ferromagnetic side of the experiment, we determine the entropy per particle S/N~0.5, close to the one at the critical temperature, S_c/N = 0.585(15). The simulations suggest the presence of an out-of-equilibrium plateau at large distances in the correlation function, thus motivating future studies on the non-equilibrium dynamics of the system. |
| title | Magnetism in the two-dimensional dipolar XY model |
| topic | Quantum Gases Strongly Correlated Electrons Atomic Physics |
| url | https://arxiv.org/abs/2305.03673 |