Breaking quantum linearity: constraints from human perception and cosmological implications

Abstract

Resolving the tension between quantum superpositions and the uniqueness of the classical world is a major open problem. One possibility, which is extensively explored both theoretically and experimentally, is that quantum linearity breaks above a given scale. Theoretically, this possibility is predicted by collapse models. They provide quantitative information on where violations of the superposition principle become manifest. Here we show that the lower bound on the collapse parameter lambda, coming from the analysis of the human visual process, is ~ 7 +/- 2 orders of magnitude stronger than the original bound, in agreement with more recent analysis. This implies that the collapse becomes effective with systems containing ~ 10^4 - 10^5 nucleons, and thus falls within the range of testability with present-day technology. We also compare the spectrum of the collapsing field with those of known cosmological fields, showing that a typical cosmological random field can yield an efficient wave function collapse.

13 pages, LaTeX, 3 figures

References in corpus (6)

• Lower and Upper Bounds on CSL Parameters from Latent Image Formation and IGM Heating
• A Kapitza-Dirac-Talbot-Lau interferometer for highly polarizable molecules
• Quantum experiments with human eyes as detectors based on cloning via stimulated emission
• Photon emission rate from atomic systems in the CSL model
• On the Energy Increase in Space-Collapse Models
• Collapse models with non-white noises II: particle-density coupled noises