Paper: Modified inertia from extended uncertainty principle(s) and its relation to MoND

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    • Paper: Modified inertia from extended uncertainty principle(s) and its relation to MoND

      A paper that Michael McCulloch relayed, and appreciated.

      Modified inertia from extended uncertainty principle(s) and its relation to MoND

      by Jaume Giné & Giuseppe Gaetano Luciano
      Published in "European Physical Journal C "


      researchgate.net/publication/3…_and_its_relation_to_MoND


      In this paper we show that Modified Inertia, i.e., the modification of inertia predicted by some alternative theories of gravity at cosmic scales, can be naturally derived within the framework of the extended uncertainty principle (EUP). Specifically, we consider two possible extensions of the Heisenberg uncertainty principle (HUP), corresponding to two different deformations of the fundamental commutator: the first one provides the natural generalization of the HUP to the (anti)-de Sitter spacetime and is endowed with only a quadratic correction in the uncertainty position. On the other hand, the second model contains both linear and quadratic extra terms. We prove that modified inertia is a direct consequence of the minimal acceleration experienced by any body due to the cosmic expansion. The obtained results are then discussed in connection with the empirical predictions of Modified Newtonian dynamics (MoND). The requirement of consistency between the two approaches allows us to fix the adjustable constant which marks the transition between the Newtonian and deep-MoND regimes.

      I don't catch all, but being coherent with GR spacetime, and Heizenberg Uncertainty, seems sane...
      One of my naive critic of MiHsC was that it was based on SR only...
      anyway, it is naive...

      I don't know the authors...
      “Only puny secrets need keeping. The biggest secrets are kept by public incredulity.” (Marshall McLuhan)
      See my raw tech-watch on scoop.it/u/alain-coetmeur & twitter.com/alain_co
    • About MiHsC/Quantzed Inertie, it is often seen as an exact version of MOND...
      Here MOND seems supported by data

      Unique prediction of 'modified gravity' challenges dark matter theory
      phys.org/news/2020-12-unique-gravity-dark-theory.html

      Phys Org wrote:

      An international group of scientists, including Case Western Reserve University Astronomy Chair Stacy McGaugh, has published research contending that a rival idea to the popular dark matter hypothesis more accurately predicts a galactic phenomenon that appears to defy the classic rules of gravity.
      This is significant, the astrophysicists say, because it further establishes the hypothesis—called modified Newtonian dynamics (MOND), or "modified gravity"—as a viable explanation for a cosmological dilemma: that galaxies appear to buck the long-accepted rules of gravity traced to Sir Isaac Newton in the late 1600's.
      The mystery: For decades, we've measured more gravitational pull in space than we think we should have—that there's not enough visible or known matter to account for it all.
      So, dark matter proponents theorize that most of the known universe is actually made of material that doesn't interact with light, making it invisible and undetectable— but that this material accounts for much of the gravitational pull among galaxies. It has been the prevailing theory for nearly 50 years.
      MOND theory, a counter explanation introduced by physicist Mordehai Milgrom from Weizmann Institute (Israel) in the early 1980s, says this gravitational pull exists because the rules of gravity are slightly altered.
      Instead of attributing the excess gravitational pull to an unseen, undetectable dark matter, MOND suggests that gravity at low accelerations is stronger than would be predicted by a pure Newtonian understanding.
      In addition, MOND made a bold prediction: the internal motions of an object in the cosmos should not only depend on the mass of the object itself, but also the gravitational pull from all other masses in the universe—called "the external field effect" (EFE).

      Milgrom said the findings, if robustly confirmed, would be "the smoking gun proving that galaxies are governed by modified dynamics rather than obeying the laws of Newton and of general relativity."
      McCulloch takes it as a point for his theory which produce a kind of MOND gravity field...


      The paper is there
      iopscience.iop.org/article/10.3847/1538-4357/abbb96
      Testing the Strong Equivalence Principle: Detection of the External Field Effect in Rotationally Supported Galaxies
      “Only puny secrets need keeping. The biggest secrets are kept by public incredulity.” (Marshall McLuhan)
      See my raw tech-watch on scoop.it/u/alain-coetmeur & twitter.com/alain_co