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We study the entanglement evolution between two harmonic oscillators havingdifferent free frequencies each leaking into an independent bath. We use anexact solution valid in the weak coupling limit and in the short timenon-Markovian regime. The reservoirs are identical and characterized by anOhmic spectral distribution with Lorents-Drude cut-off. This work is anextension of the case reported in [Phys. Rev. A 80, 062324 (2009)] where theoscillators have the same free frequency.

Entanglement dynamics for two harmonic oscillators coupled to independent environments