Separability Lindblad equation for dynamical open-system entanglement
Abstract
Providing entanglement for the design of quantum technologies in the presence of noise constitutes today's main challenge in quantum information science. A framework is required that assesses the build-up of entanglement in realistic settings. In this work, we put forth a new class of nonlinear quantum master equations in Lindblad form that unambiguously identify dynamical entanglement in open quantum systems via deviations from a separable evolution. This separability Lindblad equation restricts quantum trajectories to classically correlated states only. Unlike many conventional approaches, here the entangling capabilities of a process are not characterized by input-output relations, but separability is imposed at each instant of time. We solve these equations for crucial examples, thereby quantifying the dynamical impact of entanglement in non-equilibrium scenarios. Our results allow to benchmark the engineering of entangled states through dissipation. The separability Lindblad equation provides a unique path to characterizing quantum correlations caused by arbitrary system-bath interactions, specifically tailored for the noisy intermediate-scale quantum era.
Cite
@article{arxiv.2412.08724,
title = {Separability Lindblad equation for dynamical open-system entanglement},
author = {Julien Pinske and Laura Ares and Benjamin Hinrichs and Martin Kolb and Jan Sperling},
journal= {arXiv preprint arXiv:2412.08724},
year = {2026}
}