2007/02/28 by Sabrina Maniscalco, Stefano Olivares, Matteo G. A. Paris · 4 citations
Computer Science · Mathematics · Physics and Astronomy · #Amplitude damping channel #Gaussian #Markov process #Master equation #Mathematics #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum discord #Quantum entanglement #Quantum mechanics #Spectrum (functional analysis) #Squashed entanglement #Statistical physics #Statistics #Thermal reservoir #quant-ph
paper · pdf · doi:10.1103/physreva.75.062119
published as Phys. Rev. A 75, 062119 (2007) · 5 pages, 2 figures, published version
openalex publication_date 2007/06/28 · arxiv created 2007/07/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the non-Markovian dynamics of a two-mode bosonic system interacting with two uncorrelated thermal bosonic reservoirs. We present the solution to the exact microscopic Master equation in terms of the quantum characteristic function and study in detail the dynamics of entanglement for bipartite Gaussian states. In particular, we analyze the effects of short-time system-reservoir correlations on the separability thresholds and show that the relevant parameter is the reservoir spectral density. If the frequencies of the involved modes are within the reservoir spectral density, entanglement persists for a longer time than in a Markovian channel. On the other hand, when the reservoir spectrum is out of resonance, short-time correlations lead to a faster decoherence and to the appearance of entanglement oscillations.