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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

    martinbn

    User Avatar
    Science Advisor

    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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