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I Tilloy GRW model of gravity

  1. Sep 20, 2017 #1
    the news are reporting this paper

    Ghirardi-Rimini-Weber model with massive flashes
    Antoine Tilloy
    (Submitted on 12 Sep 2017)
    We introduce a modification of the Ghirardi-Rimini-Weber (GRW) model in which the flashes (or collapse space-time events) source a classical gravitational field. The resulting semi-classical theory of Newtonian gravity preserves the statistical interpretation of quantum states of matter in contrast with mean field approaches. It can be seen as a discrete version of recent proposals of consistent hybrid quantum classical theories. The model seems to be in agreement with known experimental data and introduces new falsifiable predictions: (1) particles do not attract themselves, (2) the 1/r gravitational potential of Newtonian gravity is cut-off at short (≲10−7m) distances, and (3) gravity makes spatial superpositions decohere at a rate inversely proportional to that coming from the vanilla GRW model. Together, the last two predictions make the model experimentally falsifiable for all values of its parameters.
    Comments: 10 pages
    Subjects: Quantum Physics (quant-ph); General Relativity and Quantum Cosmology (gr-qc)
    Cite as: arXiv:1709.03809 [quant-ph]
    (or arXiv:1709.03809v1 [quant-ph] for this version)

    what is called gravity is the result of quantum collapses in the wave function.

    so gravity isn't a fundamental spin-2 field which when quantized gives gravitons, nor spacetime curvature

    but quantum collapses in the wave function of particles.

    comments? maybe there is no "unification" of gravity with the other 3 forces, in terms of gravitons, gravity is simply the emergent property of a system of the other 3 forces and quantum wave function collapse.
  2. jcsd
  3. Sep 21, 2017 #2


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    But this has nothing to do with general relativity, it is all about Newtonian gravity. That is until the last sentence where he says

    "If semi-classical theories of the type presented here can be extended to general relativity in a convincing way and if robust criteria can be found to make them less ad hoc (see e.g. [5]), then further hope will be warranted."​
  4. Sep 21, 2017 #3
    more research is needed, but the underlying idea seems plausible
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