Title:	Quantum Zeno effect in the decoherent histories
Authors:	Wallden, Petros
Issue Date:	May-2007
Publisher:	Institute of Physics Publishing (IOP)
Citation:	Journal of Physics: Conference Series, 2007, Vol.67, 012043
Abstract:	The quantum Zeno effect arises due to frequent observations. That implies the existence of some experimenter and its interaction with the system. In this contribution, we examine what happens for a closed system if one considers a quantum Zeno type of question, namely what is the probability of a system, remaining always in a particular subspace.This has implications to the arrival time problem that is also discussed. We employ the decoherent histories approach to quantum theory, as this is the better developed formulation of closed system quantum mechanics, in particular, dealing with questions that involve time in a non-trivial way. We get a very restrictive decoherence condition, that implies that even if we do introduce an environment, there will be very few cases that we can assign probabilities to these histories, but in those cases the quantum Zeno effect is still present.
Description:	Open Access. Third international workshop DICE2006 - quantum mechanics between decoherence and determinism: new aspects from particle physics to cosmology held in September 2006 in Tuscany, Italy, 2007.
URI:	http://hdl.handle.net/2289/3657
ISSN:	1742-6588 (Print) 1742-6596 (Online)
Alternative Location:	http://arxiv.org/abs/0704.1551 http://dx.doi.org/10.1088/1742-6596/67/1/012043 http://adsabs.harvard.edu/abs/2007JPhCS..67a2043W
Copyright:	2007 IOP Publishing Ltd.
Appears in Collections:	Research Papers (TP)

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