On the Energy Increase in Space-Collapse Models

Details On the Energy Increase in Space-Collapse Models On the Energy Increase in Space-Collapse Models

2005-06-10

arxiv.org/abs/quant-ph/0506083v1

J. Phys. A: Math. Gen. 38 (2005) 8017-8038

Physics

Quantum Physics

14 pages, revtex, no figures

Scientific paper

10.1088/0305-4470/38/37/007

A typical feature of spontaneous collapse models which aim at localizing wavefunctions in space is the violation of the principle of energy conservation. In the models proposed in the literature the stochastic field which is responsible for the localization mechanism causes the momentum to behave like a Brownian motion, whose larger and larger fluctuations show up as a steady increase of the energy of the system. In spite of the fact that, in all situations, such an increase is small and practically undetectable, it is an undesirable feature that the energy of physical systems is not conserved but increases constantly in time, diverging for $t \to \infty$. In this paper we show that this property of collapse models can be modified: we propose a model of spontaneous wavefunction collapse sharing all most important features of usual models but such that the energy of isolated systems reaches an asymptotic finite value instead of increasing with a steady rate.

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