Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-04-29
J.Phys.Conf.Ser.171:012040,2009
Physics
High Energy Physics
High Energy Physics - Theory
Accepted for publication in Journal of Physics: Conference Series, Discrete '08, Symposium on Prospects in the Physics of Disc
Scientific paper
10.1088/1742-6596/171/1/012040
The possible role of decoherence due to space-time foam is discussed within the context of two models, one based on string/brane theory. and the other based on properties of black hole horizons in general relativity. It is argued that the density matrix satisfies a dissipative master equation, primarily from the study of renormalization group flows in non-critical string theory.This interpretation of the zero mode of the Liouville field as time leads necessarily to the CPT operator being ill defined. One striking consequence is that the quantum mechanical correlations of pair states of neutral mesons produced in meson factories are changed from the usual EPR state. The magnitude of this departure from EPR correlations is characterised by a parameter $\omega$. The predicted value of $\omega$ is very small or zero. However it is shown explicitly that the the non-vanishing of $\omega$ is only a feature of the model based on string/brane theory.
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