On the energy increase in space-collapse models

被引:44
作者
Bassi, A
Ippoliti, E
Vacchini, B
机构
[1] Univ Munich, Math Inst, D-80333 Munich, Germany
[2] Abdus Salam Int Ctr Theoret Phys, I-34014 Trieste, Italy
[3] Univ Trieste, Dept Theoret Phys, I-34014 Trieste, Italy
[4] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy
[5] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
[6] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy
来源
JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 2005年 / 38卷 / 37期
关键词
D O I
10.1088/0305-4470/38/37/007
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 -> infinity. 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.
引用
收藏
页码:8017 / 8038
页数:22
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