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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster I

Q 23.20: Poster

Tuesday, March 12, 2024, 17:00–19:00, Tent B

Otto cycles with a quantum rotor as the working medium — •Michael Gaida and Stefan Nimmrichter — Universität Siegen, Deutschland

Quantum rotors possess genuine features such as a non-uniform energy level spectrum and quantum revivals under free rotation. Experimental progress in levitated optomechanics has made the orientation of anisotropic nanoparticles amenable to optical control and cooling and promises to reach the quantum regime in the near future. We investigate how the working regimes of an Otto engine changes due to quantum effects. As the main result we present two Otto cycles with a planar rotor as the working medium. We distinguish between the three operation modes Engine, refrigerator and heater. A comparison of a quantum rotor with its classical counterpart reveals significant changes in the operation regimes: While one of the presented Otto cycles shows genuine quantum disadvantage, the other becomes only useful in the quantum case.

Keywords: Otto engine; Quantum rotor