Quantum Brownian motion of multipartite systems and their entanglement dynamics

Details Quantum Brownian motion of multipartite systems and their entanglement dynamics Quantum Brownian motion of multipartite systems and their entanglement dynamics

2011-06-28

arxiv.org/abs/1106.5752v1

Physics

Quantum Physics

10 pages, 6 figures

Scientific paper

We solve the model of N quantum Brownian oscillators linearly coupled to an environment of quantum oscillators at finite temperature, with no extra assumptions about the structure of the system-environment coupling. Using a compact phase-space formalism, we give a rather quick and direct derivation of the master equation and its solutions for general spectral functions and arbitrary temperatures. Since our framework is intrinsically nonperturbative, we are able to analyze the entanglement dynamics of two oscillators coupled to a common scalar field in previously unexplored regimes, such as off resonance and strong coupling.

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