Correlations and Coherence at Different Scales (CCDS25)

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 analyse 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 [1].
Going beyond previous Markov-limit studies that dismissed the possibility of steady-state entanglement by neglecting anomalous coupling terms [2], we perform a full non-equilibrium treatment that embraces non-Markovian noise and counter-rotating interactions. Logarithmic negativity reveals sizeable, robust entanglement in both scenarios
Our results depicts an experimentally realistic blueprint—compatible with contemporary photonic circuitry [3]—for turning 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.

[1] M. M. Wolf, J. Eisert, and M. B. Plenio, Phys. Rev. Lett. 90, 047904 (2003).
[2] B. Longstaff, M. G. Jabbour, and J.B. Brask, Phys. Rev. A, 108, 032209 (2023).
[3] J. Laurat et al J. Opt. B: Quantum Semiclass. Opt. 7, S577 (2005).