Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator
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.
Keywords
Cite
@article{arxiv.2311.11726,
title = {Spectroscopy of elementary excitations from quench dynamics in a dipolar XY Rydberg simulator},
author = {Cheng Chen and Gabriel Emperauger and Guillaume Bornet and Filippo Caleca and Bastien Gély and Marcus Bintz and Shubhayu Chatterjee and Vincent Liu and Daniel Barredo and Norman Y. Yao and Thierry Lahaye and Fabio Mezzacapo and Tommaso Roscilde and Antoine Browaeys},
journal= {arXiv preprint arXiv:2311.11726},
year = {2026}
}
Comments
Main text 8 pages with 4 figures ; Supplemental Material 16 pages and 13 figures