Collapse and Relativity

Details Collapse and Relativity Collapse and Relativity

2006-02-24

arxiv.org/abs/quant-ph/0602208v2

P. 340-352 in A. Bassi, D. Duerr, T. Weber and N. Zanghi (eds), Quantum Mechanics: Are there Quantum Jumps? and On the Present

Physics

Quantum Physics

12 pages, 3 figures; written for the proceedings of the conference "On the present status of quantum mechanics", 7-9 September

Scientific paper

10.1063/1.2219373

Ever since we have been in the possession of quantum theories without observers, such as Bohmian mechanics or the Ghirardi-Rimini-Weber (GRW) theory of spontaneous wave function collapse, a major challenge in the foundations of quantum mechanics is to devise a relativistic quantum theory without observers. One of the difficulties is to reconcile nonlocality with relativity. I report about recent progress in this direction based on the GRW model: A relativistic version of the model has been devised for the case of N noninteracting (but entangled) particles. A key ingredient was to focus not on the evolution of the wave function but rather on the evolution of the matter in space-time as determined by the wave function.

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