Related papers: Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator

Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator

URL: http://arxiv.org/abs/2311.11726v2
Date: Fri, 12 Jul 2024 08:51:17 GMT
Title: Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator
Authors: Cheng Chen, Gabriel Emperauger, Guillaume Bornet, Filippo Caleca, Bastien Gély, Marcus Bintz, Shubhayu Chatterjee, Vincent Liu, Daniel Barredo, Norman Y. Yao, Thierry Lahaye, Fabio Mezzacapo, Tommaso Roscilde, Antoine Browaeys,
Abstract summary: We use a Rydberg quantum simulator to demonstrate a new form of spectroscopy, called quench spectroscopy. We illustrate the method on a two-dimensional simulation of the spin-1/2 dipolar XY model.
Score: 3.0425972371602326
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: 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.

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