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Effectively classical quantum states for open systems

Ph. Blanchard·R. Olkiewicz
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Abstract

Notions of robust and "classical" states for an open quantum system are introduced and discussed in the framework of the isometric-sweeping decomposition of trace class operators. Using the predictability sieve proposed by Zurek, ``quasi-classical'' states are defined. A number of examples illustrating how the ``quasi-classical'' states correspond to classical points in phase space connected with the measuring apparatus are presented.

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Ph. Blanchard, R. Olkiewicz. 2000-03-22. Effectively classical quantum states for open systems. https://doi.org/10.1016/s0375-9601(00)00507-7

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