Dresden 2026 – scientific programme

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QI: Fachverband Quanteninformation

QI 3: Quantum Simulation

QI 3.11: Talk

Monday, March 9, 2026, 18:00–18:15, BEY/0137

Extracting transport properties using zero noise extrapolations of noisy quantum dynamics — •Hansveer Singh¹, Pieter Claeys¹, Sarang Gopalakrishnan², and Anushya Chandran³ — ¹Max Planck Institute for the Physics of Complex Systems, Dresden, DE — ²Princeton University, Princeton, New Jersey USA — ³Boston University, Boston, Massachusetts, USA

We examine extrapolating transport coefficients of quantum systems subjected to weak noise. Though noise generally breaks conservation laws of a quantum system, we show for weak noise strengths it is still possible to define an effective notion of transport. For chaotic diffusive quantum systems, we provide a protocol to extrapolate diffusion constants and argue that the effective diffusion constant in the weak noise limit can be decomposed into two parts: an analytic function of the noise strength and a function determined by non-linear corrections to diffusive hydrodynamics. We support our findings with tensor network simulations of a dissipative version of the staggered field spin-1/2 XXZ chain.

Keywords: open quantum systems; error mitigation; transport; non-equilibrium dynamics; hydrodynamics