- #1
zwicky
- 16
- 0
Hello everybody.
I have a question about the physical meaning of the simplicity constraints that is often used in spin foams. For example, in http://arxiv.org/PS_cache/arxiv/pdf/1004/1004.1780v4.pdf, eq. (34), it is written as
K=-\gamma L
where K are the boost and L the rotations.
Is there a physical motivation besides the mathematical one given in the article?
What kind of constraints is this?
Is it related to a gauge fixing?
What is the physical meaning of making the boosts proportional to the rotations? I mean, boost are related with a non compact parameter in contrast with the spatial rotations.
To me the boost ant the rotations are in principle different things, so I just can't see why this relation is so important.
Thank you very much in advance.
Zwicky.
I have a question about the physical meaning of the simplicity constraints that is often used in spin foams. For example, in http://arxiv.org/PS_cache/arxiv/pdf/1004/1004.1780v4.pdf, eq. (34), it is written as
K=-\gamma L
where K are the boost and L the rotations.
Is there a physical motivation besides the mathematical one given in the article?
What kind of constraints is this?
Is it related to a gauge fixing?
What is the physical meaning of making the boosts proportional to the rotations? I mean, boost are related with a non compact parameter in contrast with the spatial rotations.
To me the boost ant the rotations are in principle different things, so I just can't see why this relation is so important.
Thank you very much in advance.
Zwicky.