Optically induced Faraday-Goldstone waves.

Authors

Daniel Kaplan, Pavel A Volkov, Andrea Cavalleri, Premala Chandra

Published in

Proceedings of the National Academy of Sciences of the United States of America. Volume 123. Issue 35. Pages e2535297123. Epub Aug 24, 2026.

Abstract

Faraday waves, typically observed in driven fluids, result from the confluence of nonlinearity and parametric amplification. Here we show that optical pulses can generate analogous phenomena that persist much longer than the pump time-scales in ordered quantum solids. We present a theory of ultrafast light-matter interactions within a symmetry-broken state; dynamical nonlinear coupling between the Higgs (amplitude) and the Goldstone (phase) modes drives an emergent phason texture that oscillates in space and in time: Faraday-Goldstone waves. Calculated signatures of this spatiotemporal order compare well with measurements on K_0.3MoO₃; Higgs-Goldstone beating, associated with coherent energy exchange between these two modes, is also predicted. We show this light-generated crystalline state is robust to thermal noise, even when the original Goldstone mode is not. Our results offer a pathway for the design of periodic structures in quantum materials with ultrafast light pulses.

PMID:
42636383
Bibliographic data and abstract were imported from PubMed on 25 Aug 2026.

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