Any of the various explanations of gravity as a quantum theory, including string theory and loop quantum gravity.
8
votes
6answers
1k views
The final death of a black hole
What are the different death scenarios for a black hole? I know they can evaporate through Hawking radiation - but is there any other way? What if you just kept shoveling more and more mass and ...
9
votes
5answers
638 views
What is the role spin-networks play in Loop Quantum Gravity?
This is a second question (in what will probably become a series) in my attempt to understand LQG a little. In the previous question I asked about the general concepts behind LQG to which space_cadet ...
14
votes
4answers
2k views
Give a description of Loop Quantum Gravity your grandmother could understand
Of course, assuming your grandmother is not a theoretical physicist.
I'd like to hear the basics concepts that make LQG tick and the way it relates to the GR. I heard about spin-networks where one ...
4
votes
1answer
326 views
Quantum Gravity and Calculations of Mercury's Perihelion
In an astronomy forum that I frequent, I have been having a discussion where the state of quantum gravity research came up. I claimed that Loop Quantum Gravity theories couldn't prove GR in the ...
6
votes
1answer
1k views
What specifically does the phrase “continuum limit” mean?
I'm interested in the meaning of the phrase "continuum limit" specifically as it is often used in expressions relating to the ability of a quantum gravity theory to recover GR in the continuum limit.
...
10
votes
3answers
438 views
Hawking radiation and quark confinement
The simple picture of Hawking radiation is that a pair-antiparticle pair is produced near the event horizon, then one falls into the black hole while the other escapes. Suppose the particles are ...
2
votes
1answer
407 views
Introductions to discrete space-time
It's comparatively easy (cum grano salis) to grasp the following concepts:
Euclidean space-time (continous space and continuous time)
classical mechanics (discretely distributed matter in continous ...
2
votes
1answer
317 views
Possibly naive question about quantized space-time
I beg your pardon in advance if this question is naive.
In Quantum Mechanics, discrete values of measurements occur only in relation to bound states. This is because of the general solution for the ...
2
votes
3answers
629 views
What are some approaches to discrete space-time used in modern physics?
This thought gave rise to some new questions in my mind.
What are the consequences for:
How would it affect duality i.e. particle, wave property of photons?
How does this statement affect the ...
-6
votes
7answers
2k views
Does Quantum Physics really suggests this universe as a computer simulation? [closed]
I was reading about interesting article here which suggests that our universe is a big computer simulation and the proof of it is a Quantum Physics.
I know quantum physics tries to provide some ...
4
votes
3answers
269 views
What is necessary for a causal set to be manifold-like?
A causal set is a poset which is reflexive, antisymmetric, transitive and locally finite.
As a motivation, there is a programme to model spacetime as fundamentally discrete, with causal sets ...
23
votes
5answers
2k views
A list of inconveniences between quantum mechanics and relativity?
It is well known that quantum mechanics and (special and/or general) relativity do not fit well. I am wondering whether it is possible to make a list of contradictions or problems between them?
E.g. ...
