Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
1993-04-20
Phys.Rev.D48:2728-2738,1993
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
32 pages (1 figure, postcript included at the end: use epsf.tex and follow instructions before Texing) LA-UR-93-1415
Scientific paper
10.1103/PhysRevD.48.2728
We prove that for an open system, in the Markovian regime, it is always possible to construct an infinite number of non trivial sets of histories that exactly satisfy the probability sum rules. In spite of being perfectly consistent, these sets manifest a very non--classical behavior: they are quite unstable under the addition of an extra instant to the list of times defining the history. To eliminate this feature --whose implications for the interpretation of the formalism we discuss-- and to achieve the stability that characterizes the quasiclassical domain, it is necessary to separate the instants which define the history by time intervals significantly larger than the typical decoherence time. In this case environment induced superselection is very effective and the quasiclassical domain is characterized by histories constructed with ``pointer projectors''.
Paz Juan Pablo
Zurek Wojciech Hubert
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