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arXiv · 2604.08666

Fluctuation engineering in cavity quantum materials

Hope M Bretscher·Lorenzo Graziotto·Marios H Michael·Angela Montanaro·I-Te Lu·Andrey Grankin·James W McIver·Jerome Faist·Daniele Fausti·Martin Eckstein·Michael Ruggenthaler·Angel Rubio·DN Basov·Mohammad Hafezi·Martin Claassen·Dante M Kennes·Michael A Sentef
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Abstract

Coupling tailored electromagnetic fluctuations to materials provides a resource for controlling correlated quantum matter. By structuring the frequency, spatial, and modal distribution of fluctuations through a new generation of cavity quantum materials, vacuum and thermal spectra can shift phase boundaries and stabilize or suppress orders. This review organizes the field around a fluctuation-focused perspective, surveying a practical design toolbox and recent milestones, and outlining theory-experiment challenges in realistic, multimode, beyond-long-wavelength regimes. We highlight photonic observables and map opportunities for equilibrium and driven control across superconducting, magnetic, moire, and topological platforms.

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Hope M Bretscher, Lorenzo Graziotto, Marios H Michael, Angela Montanaro, I-Te Lu, Andrey Grankin, James W McIver, Jerome Faist, Daniele Fausti, Martin Eckstein, Michael Ruggenthaler, Angel Rubio, DN Basov, Mohammad Hafezi, Martin Claassen, Dante M Kennes, Michael A Sentef. 2026-04-09. Fluctuation engineering in cavity quantum materials. https://arxiv.org/abs/2604.08666

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