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Deriving Lindblad master equations with Keldysh diagrams: Correlated gain and loss in higher order perturbation theory
Motivated by correlated decay processes producing gain, loss, and lasing in driven semiconductor quantum dots [Phys. Rev. Lett. 113, 036801 (2014); Science 347, 285 (2015); Phys. Rev. Lett. 114, 196802 (2015)], we develop a theoretical technique by using Keldysh diagrammatic perturbation theory to derive a Lindblad master equation that goes …