Dresden 2026 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 46: Many-body Quantum Dynamics I (joint session DY/TT)
DY 46.1: Vortrag
Donnerstag, 12. März 2026, 09:30–09:45, HÜL/S186
Nonequilibrium transport in adaptive fermionic circuits — •Paul Weiss1, Karim Chahine2, and Michael Buchhold1 — 1Department of Theoretical Physics, Universität Innsbruck, Austria — 2Institute for Theoretical Physics, University of Cologne, Germany
We investigate nonequilibrium dynamics in one-dimensional adaptive fermionic circuits, where monitored fermions undergo local unitary evolution conditioned on measurement outcomes. By tuning the measurement strength and the duration of the unitary gates, the dynamics can be continuously interpolated between incoherent, classical transport and coherence-dominated quantum transport. In the classical limit, we recover the asymmetric simple exclusion process (ASEP), while in the quantum regime we uncover a coherent analogue of the Burgers equation along with coherence-enhanced Kardar-Parisi-Zhang (KPZ) transport. Our analytical approach, based on transport equations and Keldysh field theory, is supported by numerical simulations.
Keywords: Adaptive quantum circuits; Monitored fermions; Nonequilibrium dynamics; KPZ transport