Effectively classical quantum states for open systems

Details Effectively classical quantum states for open systems Effectively classical quantum states for open systems

2000-03-22

arxiv.org/abs/quant-ph/0003103v1

Physics

Quantum Physics

Latex File

Scientific paper

10.1016/S0375-9601(00)00507-7

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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