A Single-Molecule Quantum Heat Engine

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Abstract
Particle-exchange heat engines operate without moving parts or time-dependent driving, relying solely on static energy-selective transport. Here, we realize a particle-exchange quantum heat engine based on a single diradical molecule, which is only a few nanometers in size. We experimentally investigate its operation at low temperatures and demonstrate that both the power output and efficiency are significantly enhanced by Kondo correlations, reaching up to 53% of the Curzon-Ahlborn limit. These results establish molecular-scale particle-exchange engines as promising candidates for low-temperature applications where extreme miniaturization and energy efficiency are paramount.
Funding Information
  • HORIZON EUROPE European Research Council (10104144)
  • HORIZON EUROPE European Research Council (951519)
  • Ministerio de Ciencia, Innovaci?n y Universidades (PID2022-140845OB-C62)
  • HORIZON EUROPE European Innovation Council (101099098)
  • European Regional Development Fund
  • H2020 Future and Emerging Technologies (863098)
  • Xunta de Galicia (ED431G 2023/03)
  • Azrieli Foundation
  • Fonds De La Recherche Scientifique - FNRS (1.C044.21-SMARD)
  • Fonds De La Recherche Scientifique - FNRS (J.006823.F1-SiMolHeat)
  • Nederlandse Organisatie voor Wetenschappelijk Onderzoek

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