Reversible phasonic control of a quantum phase transition in a quasicrystal
Abstract
Periodic driving can tune the quasistatic properties of quantum matter. A well-known example is the dynamical modification of tunneling by an oscillating electric field. Here we show experimentally that driving the phasonic degree of freedom of a cold-atom quasicrystal can continuously tune the effective quasi-disorder strength, reversibly toggling a localization-delocalization quantum phase transition. Measurements agree with fit-parameter-free theoretical predictions, and illuminate a fundamental connection between Aubry-Andr\'e localization in one dimension and dynamic localization in the associated two-dimensional Harper-Hofstadter model. These results open up new experimental possibilities for dynamical coherent control of quantum phase transitions.
Keywords
Cite
@article{arxiv.2312.00976,
title = {Reversible phasonic control of a quantum phase transition in a quasicrystal},
author = {Toshihiko Shimasaki and Yifei Bai and H. Esat Kondakci and Peter Dotti and Jared E. Pagett and Anna R. Dardia and Max Prichard and André Eckardt and David M. Weld},
journal= {arXiv preprint arXiv:2312.00976},
year = {2023}
}
Comments
5 pages, 4 figures, Supplementary information