28th RQC Seminar
Prof. Kay Brandner
(School of Physics and Astronomy and Centre for the Mathematics and Theoretical Physics of Quantum Non-Equilibrium Systems University of Nottingham)
16:00-17:00 (JST), February 22, 2023 (Wednesday)
Onsite (Wako Main Research 4F 435-437Meeting Room RIKEN Wako branch)
Quantum Thermal Machines: From Single Atoms to Many-Body Systems
With the miniaturization of thermal machines reaching ever smaller length and energy scales, the question how quantum phenomena can be exploited to design new types of heat engines and refrigerators is moving into the focus of current research. In this talk, I will first give a brief overview on experimental and theoretical advances that took place over the past years at the intersection of quantum engineering and quantum thermodynamics. A key problem in the development of quantum thermal machines is to understand how collective effects in many-body systems can be exploited to scale up their thermodynamic output. In the second part of this talk, I will discuss two theoretical proposals for such many-body quantum machines based on Rydberg-atomic and opto-mechanical systems [1,2].
 Federico Carollo, Filippo M. Gambetta, KB, Juan P. Garrahan, and Igor Lesanovsky; "Nonequilibrium Quantum Many-Body Rydberg Atom Engine"; Phys. Rev. Lett. 124, 170602 (2020).
 Federico Carollo, KB, and Igor Lesanovsky; "Nonequilibrium Many-Body Quantum Engine Driven by Time-Translation Symmetry Breaking"; Phys. Rev. Lett. 125, 240602 (2020).