We consider the technique introduced in a recent work by Ashtekar, Campiglia
and Henderson, which generate a spinfoam-like sum from a Hamiltonian theory. We
study the possibility of using it for finding the generalized projector of a
constraint on physical states, without first deparametrising the system. We
illustrate this technique in the context of a very simple example. We discuss
the infinities that appear in the calculation, and argue that they can be
appropriately controlled. We apply these ideas to write a spinfoam expansion
for the "dipole cosmology".
Description
[0911.3097] On the spinfoam expansion in cosmology
%0 Journal Article
%1 Rovelli2009
%A Rovelli, Carlo
%A Vidotto, Francesca
%D 2009
%K Constraints lqc lqg spinfoam
%T On the spinfoam expansion in cosmology
%U http://arxiv.org/abs/0911.3097
%X We consider the technique introduced in a recent work by Ashtekar, Campiglia
and Henderson, which generate a spinfoam-like sum from a Hamiltonian theory. We
study the possibility of using it for finding the generalized projector of a
constraint on physical states, without first deparametrising the system. We
illustrate this technique in the context of a very simple example. We discuss
the infinities that appear in the calculation, and argue that they can be
appropriately controlled. We apply these ideas to write a spinfoam expansion
for the "dipole cosmology".
@article{Rovelli2009,
abstract = { We consider the technique introduced in a recent work by Ashtekar, Campiglia
and Henderson, which generate a spinfoam-like sum from a Hamiltonian theory. We
study the possibility of using it for finding the generalized projector of a
constraint on physical states, without first deparametrising the system. We
illustrate this technique in the context of a very simple example. We discuss
the infinities that appear in the calculation, and argue that they can be
appropriately controlled. We apply these ideas to write a spinfoam expansion
for the "dipole cosmology".
},
added-at = {2010-02-14T22:30:17.000+0100},
author = {Rovelli, Carlo and Vidotto, Francesca},
biburl = {https://www.bibsonomy.org/bibtex/2e4584361add647c6203e411e9892ac0b/random3f},
description = {[0911.3097] On the spinfoam expansion in cosmology},
interhash = {f188c3861aa37f632ddf7ec234564d76},
intrahash = {e4584361add647c6203e411e9892ac0b},
keywords = {Constraints lqc lqg spinfoam},
note = {cite arxiv:0911.3097
Comment: 6 pages},
timestamp = {2010-02-14T22:30:17.000+0100},
title = {On the spinfoam expansion in cosmology},
url = {http://arxiv.org/abs/0911.3097},
year = 2009
}