Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Loop quantum cosmology from an alternative Hamiltonian. II. Including
  the Lorentzian term   The scheme of using the Chern-Simons action to regularize the gravitational
Hamiltonian constraint is extended to including the Lorentzian term in the
$k=0$ cosmological model. The Euclidean term and the Lorenzian term are thus
regularized separately mimicking the treatment of full loop quantum gravity.
The new quantum dynamics for the spatially flat Friedmann-Robertson-Walker
model with a massless scalar field as an emergent time is studied. By
semiclassical analysis, the effective Hamiltonian constraint is obtained, which
indicates that the new quantum dynamics has the correct classical limit. The
classical big-bang singularity is again replaced by a quantum bounce. Similar
to the case of quantizing only the Euclidean term, the backward evolution of
the cosmological model determined by the new effective Hamiltonian will be
bounced to an asymptotic de Sitter universe coupled to a massless scalar field,
while the problem of negative energy density of matter in the former case is
resolved.

6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
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The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex