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arXiv · 2502.15490

Cavity QED Control of Quantum Hall Stripes

Lorenzo Graziotto·Josefine Enkner·Sambuddha Chattopadhyay·Jonathan B. Curtis·Ethan Koskas·Christian Reichl·Werner Wegscheider·Giacomo Scalari·Eugene Demler·Jérôme Faist
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Abstract

Controlling quantum phases of materials with vacuum field fluctuations in engineered cavities is a novel route towards the optical control of emergent phenomena. We demonstrate, using magnetotransport measurements of a high-mobility two-dimensional electron gas, striking cavity-induced anisotropies in the electronic transport, including the suppression of the longitudinal resistance well below the resistivity at zero magnetic field. Our cavity-induced effects occur at ultra-low temperatures (< 200 mK) when the magnetic field lies between quantized Hall plateaus. We interpret our results as arising from the stabilization of thermally-disordered quantum Hall stripes. Our work presents a clear demonstration of the cavity QED control of a correlated electronic phase.

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Lorenzo Graziotto, Josefine Enkner, Sambuddha Chattopadhyay, Jonathan B. Curtis, Ethan Koskas, Christian Reichl, Werner Wegscheider, Giacomo Scalari, Eugene Demler, Jérôme Faist. 2025-02-21. Cavity QED Control of Quantum Hall Stripes. https://doi.org/10.1038/s41567-026-03287-3

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