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QI: Fachverband Quanteninformation

QI 9: Decoherence and Open Systems I

QI 9.2: Vortrag

Dienstag, 10. März 2026, 14:15–14:30, BEY/0245

Dissipation as a resource: non-Markovian pathways to autonomous steady-state entanglement in photonic platforms — •Karol Kawa¹, Katarzyna Roszak¹, Radim Filip², and Tomáš Novotný³ — ¹FZU -- Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic — ²Palacký University Olomouc, Olomouc, Czech Republic — ³Charles University, Prague, Czech Republic

Decoherence is usually cast as the nemesis of entanglement in open quantum systems. Here we overturn that narrative and show that environmental engineering can, by itself, generate and stabilize entanglement. We analyze two bosonic modes, each coupled to an independent, uncorrelated thermal bath, and explore two complementary routes toward autonomous entanglement: (i) direct mode*mode coupling and~(ii) dissipation-induced single-mode squeezing followed by passive linear optics. Going beyond previous Markov-limit studies that dismissed the possibility of steady-state entanglement by neglecting anomalous coupling terms, we perform a full non-equilibrium treatment that embraces non-Markovian noise and counter-rotating interactions. Logarithmic negativity reveals a robust, sizable entanglement in both scenarios. Our results depict an experimentally realistic blueprint compatible with contemporary photonic circuitry to transform unavoidable dissipation into a functional resource. By revealing how tailored system-bath couplings autonomously drive quantum correlations, this work enriches the toolbox of reservoir engineering and advances the quest for scalable, self-contained quantum technologies.

Keywords: autonomous entanglement; quantum optics; Gaussian states