Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 69: Open Quantum Systems II (joint session Q/QI)

Q 69.1: Talk

Friday, March 14, 2025, 11:00–11:15, HS I

Controlling matter phases beyond Markov — •Baptiste Debecker, John Martin, and François Damanet — University of Liège, Liège, Belgium

Controlling phase transitions in quantum systems via coupling to reservoirs has been mostly studied for idealized memory-less environments under the so-called Markov approximation. Yet, most quantum materials and experiments in the solid state, atomic, molecular and optical physics are coupled to reservoirs with finite memory times. Here, using the spectral theory of non-Markovian dissipative phase transitions developed in the companion paper [Debecker, Martin, and Damanet (to be published)], we show that memory effects can be leveraged to reshape matter phase boundaries, but also reveal the existence of dissipative phase transitions genuinely triggered by non-Markovian effects.

Keywords: Open quantum systems; Dissipaive phase transitions; Non-Markovian quantum dynamics