Lower and Upper Bounds on CSL Parameters from Latent Image Formation and IGM Heating
Jul, 200650 pages
Published in:
- J.Phys.A 40 (2007) 2935-2958,
- J.Phys.A 40 (2007) 13501 (erratum)
e-Print:
- quant-ph/0605072 [quant-ph]
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Abstract: (arXiv)
We study lower and upper bounds on the parameters for stochastic state vector reduction, focusing on the mass-proportional continuous spontaneous localization (CSL) model. We show that the assumption that the state vector is reduced whan a latent image is formed, in photography or etched track detection, requires a CSL rate parameter that is larger than conventionally assumed by a factor of roughly , for a correlation length of . We reanalyze existing upper bounds on the reduction rate and conclude that all are compatible with such an increase in . The best bounds that we have obtained come from a consideration of heating of the intergalactic medium (IGM), which shows that can be at most times as large as the standard CSL value, again for . (For both the lower and upper bounds, quoted errors are not purely statistical errors, but rather are estimates reflecting modeling uncertainties.) We discuss modifications in our analysis corresponding to a larger value of . With a substantially enlarged rate parameter, CSL effects may be within range of experimental detection (or refutation) with current technologies. ADDED NOTE: A careful calculation of radiation from atomic systems in the CSL model (Adler and Ramazanoglu, arXiv:0707.3134) has reinstated the bound obtained by Fu as the best upper bound on lambda, with significant implications for CSL model phenomenology.Note:
- Tex, 50p To appear in J. Phys. A: Math-Gen, in the special issue ``The Quantum Universe'' in honor of G. C. Ghirardi. Version 9(apart from minor copy-editing style changes) is the final published version. SEE ADDED NOTE IN ABSTRACT
- 02.50.Ey
- 03.65.Ta
- 03.65.-w
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