Entanglement trapping in structured environments

Bruno Bellomo, Rosario Lo Franco, Sabrina Maniscalco, Giuseppe Compagno

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We derive and solve analytically the non-Markovian master equation for harmonic quantum Brownian motion proving that, for weak system-reservoir couplings and high temperatures, it can be recast in the form of the master equation for a harmonic oscillator interacting with a squeezed thermal bath. This equivalence guarantees preservation of positivity of the density operator during the time evolution and allows one to establish a connection between the dynamics of Schrödinger cat states in squeezed environments and environment-induced decoherence in quantum Brownian motion.
Original languageEnglish
Article number060302
Number of pages4
JournalPhysical Review A
Issue number6
Publication statusPublished - 12 Dec 2008

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    Bellomo, B., Lo Franco, R., Maniscalco, S., & Compagno, G. (2008). Entanglement trapping in structured environments. Physical Review A, 78(6), [060302]. https://doi.org/10.1103/PhysRevA.78.060302