Will QG leave GR unchanged or QT?

  • Context: Graduate 
  • Thread starter Thread starter Sunil
  • Start date Start date
  • Tags Tags
    Gr
Click For Summary

Discussion Overview

The discussion revolves around the implications of quantum gravity (QG) on general relativity (GR) and quantum theory (QT). Participants explore whether QG will modify existing theories or maintain the principles of QT while addressing issues related to GR. The conversation includes theoretical perspectives, interpretations of quantum mechanics, and the nature of infinities in physical theories.

Discussion Character

  • Debate/contested
  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants argue that QG should be viewed as a quantum theory that approximates classical GR under certain conditions, while others suggest it may not relate to GR at all.
  • There is a discussion about the asymmetry between GR and QT, with some suggesting that GR's singularities necessitate a new theory, whereas QT does not have similar issues.
  • Concerns are raised about the implications of infinities in physical values, particularly regarding Bohmian mechanics and stochastic interpretations of QT.
  • One participant mentions a specific approach to QG that expands beyond spacetime, proposing a seven-dimensional sphere and a principle of minimum flow.
  • Participants express differing views on the significance of infinite values in physical theories, with some considering them problematic and others questioning their relevance.

Areas of Agreement / Disagreement

Participants do not reach a consensus, as multiple competing views remain regarding the relationship between QG, GR, and QT, as well as the implications of infinities in physical theories.

Contextual Notes

Limitations include unresolved mathematical steps regarding the nature of infinities and the definitions of physical quantities. The discussion also reflects varying interpretations of quantum mechanics and their implications for fundamental theories.

  • #61
martinbn said:
This is the probably what will happen, but are there any attemts at addapting QM to GR?
I don't know. I tried, and you can read about my attempts on my blog. But I can't say I succeeded.
 

Similar threads

Undergrad Dirac quantization of gravity e.g. GR in Ashtekar Variables
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Ads/CFT and Ashtekar variables or spinfoam
  • · Replies 7 ·
Replies
7
Views
3K
Undergrad MOND from MacDowell-Mansouri geometrical formulation
  • · Replies 19 ·
Replies
19
Views
4K
Undergrad Is There A Simple Dark Matter Solution Rooted In GR?
  • · Replies 11 ·
Replies
11
Views
3K
Graduate Hardy's approach to quantum gravity and QM interpretation
  • · Replies 37 ·
2
Replies
37
Views
9K
Graduate Higgs inflation and quadratic gravity
  • · Replies 1 ·
Replies
1
Views
4K
High School New hypothesis of continuous wave function collapse
  • · Replies 5 ·
Replies
5
Views
3K
Graduate The implications of no gravtational waves on QG, strings, gr
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad MOND as a purely quantum gravity effect
  • · Replies 4 ·
Replies
4
Views
3K
Graduate LQG Legend Writes Paper Claiming GR Explains Dark Matter Phenomena
  • · Replies 264 ·
9
Replies
264
Views
23K