A cosmic shadow on CSL. (arXiv:1906.04405v3 [quant-ph] UPDATED)

<a href="http://arxiv.org/find/quant-ph/1/au:+Martin_J/0/1/0/all/0/1">Jerome Martin</a>, <a href="http://arxiv.org/find/quant-ph/1/au:+Vennin_V/0/1/0/all/0/1">Vincent Vennin</a>

The Continuous Spontaneous Localisation (CSL) model solves the measurement

problem of standard quantum mechanics, by coupling the mass density of a

quantum system to a white-noise field. Since the mass density is not uniquely

defined in general relativity, this model is ambiguous when applied to

cosmology. We however show that most natural choices of the density contrast

already make current measurements of the cosmic microwave background

incompatible with other laboratory experiments.

The Continuous Spontaneous Localisation (CSL) model solves the measurement

problem of standard quantum mechanics, by coupling the mass density of a

quantum system to a white-noise field. Since the mass density is not uniquely

defined in general relativity, this model is ambiguous when applied to

cosmology. We however show that most natural choices of the density contrast

already make current measurements of the cosmic microwave background

incompatible with other laboratory experiments.

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