Non-Markovian weak coupling limit of quantum Brownian motion

Sabrina Maniscalco, Jyrki Piilo, Kalle-Antti Suominen

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


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
Pages (from-to)181-187
JournalEuropean Physical Journal D
Issue number1
Publication statusPublished - 12 Aug 2009


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