Gravity is not entropic force ?

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Discussion Overview

The discussion revolves around the nature of gravity, specifically questioning whether it can be considered an entropic force. Participants reference various theoretical frameworks, including those proposed by Archil Kobakhidze and Erik Verlinde, and discuss experimental evidence involving neutron interferometry.

Discussion Character

  • Debate/contested
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants highlight Kobakhidze's claim that gravity is not an entropic force, referencing an experiment involving neutrons and quantum states formed in a slit.
  • Others express skepticism about the connection between the neutron experiment and Verlinde's theory, questioning how the experiment's results relate to the concept of entropic gravity.
  • Motl's critiques of Verlinde's approach are noted, with some participants finding his arguments more comprehensible and relevant to the discussion.
  • There are claims that Verlinde's framework fails to account for certain aspects of gravity, such as the equivalence principle and the implications of starting with zero entropy for mass.
  • Some participants argue that mass cannot have zero entropy, suggesting that mass is inherently linked to disorder and entropy, while others challenge this perspective.
  • Discussions also touch on the relationship between mass, temperature, and disorder, with contrasting views on their definitions and implications in the context of special and general relativity.
  • There is mention of the holographic principle and its relevance to the discussion, with some participants asserting that it must explain unique states in gravitational fields.

Areas of Agreement / Disagreement

Participants express a range of views, with no clear consensus on whether gravity can be classified as an entropic force. Disagreements persist regarding the implications of various theories and experimental results.

Contextual Notes

Some arguments rely on specific interpretations of quantum states and entropy, which may not be universally accepted. The discussion includes references to theoretical constructs that may not have been empirically validated.

  • #91
MTd2 said:
Yes, yes, yes. For 15, mc*logistic function, with 0 at r=0, and a non zero value at r=holographic screen. But one very steep, quite a step function.


If yes, yes, yes than 15 should be correct as well - its simple algebra. I am puzzled where does this "logistic function" come from? Ok, I think you do not have answer on this question right now. Let me now if you will be able to calculate your "logistic function", for me it is = 1. :wink:
 
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  • #92
CHIKO-2010 said:
If yes, yes, yes than 15 should be correct as well - its simple algebra. I am puzzled where does this "logistic function" come from?

The problem is that the deficit of operator may not have a trivial dependence. For example, I chose the logistic function because it must be smooth at the origin and at the holographic screen, and constantly. Surely, you can find a constant, but it is such only in the vicinity of some place. But this approximation is enough, and taken to be null, in the vicinity of earth, and probably to all the universe of which we can see through instruments.
 
  • #93
On a further note. You seem to be much more interested than I am in defending that paper. Given that I am not even being payed for that, I guess I will leave up when doubts are raised occasionally on other threads.
 

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