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L. Sörgel and K. Hornberger
Unraveling quantum Brownian motion: Pointer states and their classical trajectories
Phys. Rev. A 92, 062112 (2015)


We characterize the pointer states generated by the master equation of quantum Brownian motion and derive stochastic equations for the dynamics of their trajectories in phase space. Our method is based on a Poissonian unraveling of the master equation whose deterministic part exhibits soliton-like solutions that can be identified with the pointer states. In the semiclassical limit, their equations of motion in phase space turn into those of classical diffusion, yielding a clear picture of the quantum-classical transition induced by environmental decoherence.

(10 pages, 5 figures)   [pdf, journal, arXiv:1509.02392 ]

doi:10.1103/PhysRevA.92.062112            (c) The American Physical Society