Dresden 2026 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 75: Many-body Quantum Dynamics I (joint session DY/TT)

TT 75.8: Talk

Thursday, March 12, 2026, 11:30–11:45, HÜL/S186

Dissipative diffusion in quantum state preparation — •Tim Pokart¹, Lukas König¹, Sebastian Diehl², and Jan Carl Budich^1,3,4 — ¹Institute of Theoretical Physics, Technische Universität Dresden — ²Institut für Theoretische Physik, Universität zu Köln, 50937 Cologne, Germany — ³Würzburg-Dresden Cluster of Excellence ct.qmat, 01062 Dresden, Germany — ⁴Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Str. 38, 01187 Dresden, Germany

Dissipative quantum protocols that engineer a desired state as their dark state provide a powerful route to preparing quantum many-body states. We investigate a number conserving variant of such a dissipative protocol which is able to stabilize a topologically nontrivial phase. We show that the protocol admits a unique and stable dark state. Furthermore, we find that the cooling is diffusive in nature, supported by both analytical arguments and numerical simulations.

Keywords: engineered dissipation; open quantum systems; topological phases; non-Hermitian dynamics