Berlin 2024 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 3: Focus Session: Quantum Interactive Dynamics I (joint session DY/TT)

DY 3.2: Hauptvortrag

Montag, 18. März 2024, 10:00–10:30, A 151

Measurement phase transitions and universality — •Adam Nahum — ENS Paris & CNRS

Repeated measurement can lead to a phase transition in quantum many-body dynamics. A subcritical rate of measurement allows complex, entangled states to evolve, while a supercritical measurement rate kills long-range entanglement. These phase transitions allow formal analogies with standard ordering transitions, but they are fundamentally different, partly as a result of the role played by quantum mechanical measurement randomness. Obtaining exact results for generic versions of the problem is challenging. I will sketch limits in which progress can be made (for example mean-field-like models, models in high dimensions, and noninteracting analogs).