Reversible phasonic control of a quantum phase transition in a quasicrystal

• URL: http://arxiv.org/abs/2312.00976v1
• Date: Sat, 2 Dec 2023 00:20:23 GMT
• Title: Reversible phasonic control of a quantum phase transition in a quasicrystal
• Authors: Toshihiko Shimasaki, Yifei Bai, H. Esat Kondakci, Peter Dotti, Jared E. Pagett, Anna R. Dardia, Max Prichard, Andr\'e Eckardt, and David M. Weld
• Abstract summary: We show that periodic driving can tune the quasistatic properties of quantum matter. We illuminate a connection between Aubry-Andr'e localization in one dimension and dynamic localization in the associated two-dimensional Harper-Hofstadter model.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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