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Q: Fachverband Quantenoptik und Photonik
Q 69: Open Quantum Systems II (joint session Q/QI)
Q 69.7: Vortrag
Freitag, 14. März 2025, 12:30–12:45, HS I
Non-Markovian dynamics of giant atificial atoms at finite temperature — •Mei Yu1, Hai Chau Nguyen1, Walter Strunz2, Valentin Link2, and Stefan Nimmrichter1 — 1University of Siegen, Siegen, Germany — 2Dresden University of Technology, Dresden, Germany
Superconducting qubits, when coupled to either a meandering transmission line or to surface acoustic waves, enable the creation of giant artificial atoms. These atoms interact with the waveguide through two or more spatially separated contact points, providing a tunable platform to explore non-Markovian dynamics with significant memory effects beyond the atomic lifetime. Thus far, the non-Markovian characteristics of this system have been analyzed at zero temperature and validated experimentally [1]. In this work, we examine the influence of finite temperature on the non-Markovian behavior of giant atom dynamics. Contrary to intuitive expectations, we find that thermal effects can suppress the spontaneous emission decay rate rather than enhancing it.
[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: Non-Markovianity; Giant artificial atoms; Open quantum system dynamics; Finite temperature; Quantum memory effects