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Q: Fachverband Quantenoptik und Photonik

Q 33: Open Quantum Systems

Q 33.4: Talk

Wednesday, March 13, 2024, 15:15–15:30, HS 1199

Thermodynamic behaviour of giant artificial atoms with non-Markovian thermalization — •Mei Yu, H. Chau Nguyen, and Stefan Nimmrichter — University of Siegen, Siegen, Germany

Superconducting qubits, when coupled to either a meandering transmission line or to surface acoustic waves, enable the creation of giant artificial atoms. These artificial atoms, if connected to a waveguide through multiple separated contacts, can be made to interact with a travelling bosonic field at multiple points in time. This results in a tailored memory effect and non-Markovian dynamics that has been demonstrated experimentally [1]. We investigate scenarios in which one or more giant atoms couple to thermally excited waveguide radiation via multiple contacts, leading to non-Markovian equilibration processes. We then apply such setups in case studies of non-Markovian heat transport and refrigeration between independent thermal reservoirs

[1] G. Andersson, B. Suri, L. Guo, T. Aref, and P. Delsing, Non-exponential decay of a giant artificial atom, Nature Physics 15, 1123 (2019).

Keywords: Giant atoms; Non-Markovian; Open quantum system; Thermodymics; Non-equilibrium process