Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator
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arXiv
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| Format: | Preprint |
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2023
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| author | Chen, Cheng Emperauger, Gabriel Bornet, Guillaume Caleca, Filippo Gély, Bastien Bintz, Marcus Chatterjee, Shubhayu Liu, Vincent Barredo, Daniel Yao, Norman Y. Lahaye, Thierry Mezzacapo, Fabio Roscilde, Tommaso Browaeys, Antoine |
| author_facet | Chen, Cheng Emperauger, Gabriel Bornet, Guillaume Caleca, Filippo Gély, Bastien Bintz, Marcus Chatterjee, Shubhayu Liu, Vincent Barredo, Daniel Yao, Norman Y. Lahaye, Thierry Mezzacapo, Fabio Roscilde, Tommaso Browaeys, Antoine |
| contents | We use a Rydberg quantum simulator to demonstrate a new form of spectroscopy, called quench spectroscopy, which probes the low-energy excitations of a many-body system. We illustrate the method on a two-dimensional simulation of the spin-1/2 dipolar XY model. Through microscopic measurements of the spatial spin correlation dynamics following a quench, we extract the dispersion relation of the elementary excitations for both ferro- and anti-ferromagnetic couplings. We observe qualitatively different behaviors between the two cases that result from the long-range nature of the interactions, and the frustration inherent in the antiferromagnet. In particular, the ferromagnet exhibits elementary excitations behaving as linear spin waves. In the anti-ferromagnet, spin waves appear to decay, suggesting the presence of strong nonlinearities. Our demonstration highlights the importance of power-law interactions on the excitation spectrum of a many-body system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_11726 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator Chen, Cheng Emperauger, Gabriel Bornet, Guillaume Caleca, Filippo Gély, Bastien Bintz, Marcus Chatterjee, Shubhayu Liu, Vincent Barredo, Daniel Yao, Norman Y. Lahaye, Thierry Mezzacapo, Fabio Roscilde, Tommaso Browaeys, Antoine Quantum Gases Atomic Physics Quantum Physics We use a Rydberg quantum simulator to demonstrate a new form of spectroscopy, called quench spectroscopy, which probes the low-energy excitations of a many-body system. We illustrate the method on a two-dimensional simulation of the spin-1/2 dipolar XY model. Through microscopic measurements of the spatial spin correlation dynamics following a quench, we extract the dispersion relation of the elementary excitations for both ferro- and anti-ferromagnetic couplings. We observe qualitatively different behaviors between the two cases that result from the long-range nature of the interactions, and the frustration inherent in the antiferromagnet. In particular, the ferromagnet exhibits elementary excitations behaving as linear spin waves. In the anti-ferromagnet, spin waves appear to decay, suggesting the presence of strong nonlinearities. Our demonstration highlights the importance of power-law interactions on the excitation spectrum of a many-body system. |
| title | Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator |
| topic | Quantum Gases Atomic Physics Quantum Physics |
| url | https://arxiv.org/abs/2311.11726 |