Matter Density and Relativistic Models of Wave Function Collapse

Details Matter Density and Relativistic Models of Wave Function Collapse Matter Density and Relativistic Models of Wave Function Collapse

2011-11-06

arxiv.org/abs/1111.1425v2

Physics

Quantum Physics

6 pages LaTeX, 3 figures; v2: further references added

Scientific paper

Mathematical models for the stochastic evolution of wave functions that combine the unitary evolution according to the Schrodinger equation and the collapse postulate of quantum theory are well understood for non-relativistic quantum mechanics. Recently, there has been progress in making these models relativistic. But even with a fully relativistic law for the wave function evolution, a problem with relativity remains: Different Lorentz frames may yield conflicting values for the matter density at a space-time point. One solution to this problem is provided by Tumulka's "flash" model. Another solution is presented here. We propose a relativistic version of the law for the matter density function. According to our proposal, the matter density function at a space-time point x is obtained from the wave function psi on the past light cone of x by setting the i-th particle position in |psi|^2 equal to x, integrating over the other particle positions, and averaging over i. We show that the predictions that follow from this proposal agree with all known experimental facts.

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