QG & Einstein's Low Level Energies: Consequences

  • Thread starter Thread starter Tom McCurdy
  • Start date Start date
  • Tags Tags
    Mean
Tom McCurdy
Messages
1,017
Reaction score
1
What would it mean if QG is correct and einsteins equations only work for low level energies, what would be the consequences
 
Physics news on Phys.org
search for "quantum gravity" and "phenomenology". Only a few ones are suggested. Mostly Amelino-Camelia, et al
 
Tom McCurdy said:
What would it mean if QG is correct and einsteins equations only work for low level energies, what would be the consequences

this is the big question around testing QG
Alejandro is right:
when people write papers about "what it would mean if" that is called
"phenomenology"

For us humans it would mean no discernable difference.
But there might be some difference that could be detected in
the arrival of a burst of gammarays from a billion lightyears away.

and this is constantly happening, so it is potentially a great source
of information.

so the phenomenologist (like Amelino, as arivero says) must
do some calculations to see what effects a QG model predicts,
and then tell the astronomers what to look for,
as a way of testing the model.

there was a conference in February this year called WS-2004 about
QG phenomenology. (the field is currently getting some attention
from astronomers, and some showed up)
 
https://arxiv.org/pdf/2503.09804 From the abstract: ... Our derivation uses both EE and the Newtonian approximation of EE in Part I, to describe semi-classically in Part II the advection of DM, created at the level of the universe, into galaxies and clusters thereof. This advection happens proportional with their own classically generated gravitational field g, due to self-interaction of the gravitational field. It is based on the universal formula ρD =λgg′2 for the densityρ D of DM...
Thread 'LQG Legend Writes Paper Claiming GR Explains Dark Matter Phenomena'
A new group of investigators are attempting something similar to Deur's work, which seeks to explain dark matter phenomena with general relativity corrections to Newtonian gravity is systems like galaxies. Deur's most similar publication to this one along these lines was: One thing that makes this new paper notable is that the corresponding author is Giorgio Immirzi, the person after whom the somewhat mysterious Immirzi parameter of Loop Quantum Gravity is named. I will be reviewing the...
Many of us have heard of "twistors", arguably Roger Penrose's biggest contribution to theoretical physics. Twistor space is a space which maps nonlocally onto physical space-time; in particular, lightlike structures in space-time, like null lines and light cones, become much more "local" in twistor space. For various reasons, Penrose thought that twistor space was possibly a more fundamental arena for theoretical physics than space-time, and for many years he and a hardy band of mostly...

Similar threads

Back
Top