Quantcast
  • Register
PhysicsOverflow is a next-generation academic platform for physicists and astronomers, including a community peer review system and a postgraduate-level discussion forum analogous to MathOverflow.

Welcome to PhysicsOverflow! PhysicsOverflow is an open platform for community peer review and graduate-level Physics discussion.

Please help promote PhysicsOverflow ads elsewhere if you like it.

News

Please welcome our new moderators!

Please do help out in categorising submissions. Submit a paper to PhysicsOverflow!

... see more

Tools for paper authors

Submit paper
Claim Paper Authorship

Tools for SE users

Search User
Reclaim SE Account
Request Account Merger
Nativise imported posts
Claim post (deleted users)
Import SE post

Users whose questions have been imported from Physics Stack Exchange, Theoretical Physics Stack Exchange, or any other Stack Exchange site are kindly requested to reclaim their account and not to register as a new user.

Public \(\beta\) tools

Report a bug with a feature
Request a new functionality
404 page design
Send feedback

Attributions

(propose a free ad)

Site Statistics

122 submissions , 103 unreviewed
3,497 questions , 1,172 unanswered
4,543 answers , 19,337 comments
1,470 users with positive rep
407 active unimported users
More ...

How is Matter Modelled in Loop Quantum Gravity?

+ 7 like - 0 dislike
1606 views

I have a basic understanding of how gravitational degrees of freedom are modelled in loop quantum gravity, but as far as I know, the main machinery - spin network states and observables, does not encode the matter degrees of freedom. My question is simply: How is matter currently modelled in loop quantum gravity?

Edit: Actually, the question applies not only to matter as in fermionic matter, but also the other three forces. The LQG spin networks are based around the SU2 symmetry of Ashtekar's gauge description of gravity - how do they incorporate the other gauge groups?

This post imported from StackExchange Physics at 2014-03-22 17:03 (UCT), posted by SE-user twistor59
asked Feb 27, 2013 in Theoretical Physics by twistor59 (2,490 points) [ no revision ]
Concerning chiral matter in LQG, see also pt. 4 in this Phys.SE post or pt. 7 in this blog page, both by Lubos Motl.

This post imported from StackExchange Physics at 2014-03-22 17:03 (UCT), posted by SE-user Qmechanic
@Qmechanic Right, that's exactly along the lines I was thinking. But I read up on LQG a couple of years ago now, and I was wondering if any new developments had come along in the meantime. Though the model elements are so intimately linked with gravity I can't imagine how you would weave matter into it.

This post imported from StackExchange Physics at 2014-03-22 17:03 (UCT), posted by SE-user twistor59
Ha, thats a fun question, I am curious about that too. And you have choosen the right time to post it when Lumo is asleep ... :- D

This post imported from StackExchange Physics at 2014-03-22 17:03 (UCT), posted by SE-user Dilaton

Your answer

Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead.
To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL.
Please consult the FAQ for as to how to format your post.
This is the answer box; if you want to write a comment instead, please use the 'add comment' button.
Live preview (may slow down editor)   Preview
Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:
p$\hbar$ysicsOv$\varnothing$rflow
Then drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds).
To avoid this verification in future, please log in or register.




user contributions licensed under cc by-sa 3.0 with attribution required

Your rights
...