A photonic quantum heat engine based on superradiance — many-atom quantum coherence — is shown to deliver enhanced operation, with an efficiency no longer bounded by the Carnot limit.
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Kim, M., Scully, M. & Svidzinsky, A. A supercharged photonic quantum heat engine. Nat. Photon. 16, 669–670 (2022). https://doi.org/10.1038/s41566-022-01076-x
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DOI: https://doi.org/10.1038/s41566-022-01076-x