Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A spin-foam vertex amplitude with the correct semiclassical limit   Spin-foam models are hoped to provide a dynamics for loop quantum gravity.
These start from the Plebanski formulation of gravity, in which gravity is
obtained from a topological field theory, BF theory, through constraints,
which, however, select more than one gravitational sector, as well as an
unphysical degenerate sector. We show this is why terms beyond the needed
Feynman-prescribed one appear in the semiclassical limit of the EPRL spin-foam
amplitude. By quantum mechanically isolating a single gravitational sector, we
modify this amplitude, yielding a spin-foam amplitude for loop quantum gravity
with the correct semiclassical limit.

1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph