Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Riemannian effective spacetime effects on Hawking radiation in
  superfluids   Riemannian effective spacetime description of Hawking radiation in $^{3}He-A$
superfluids is extended to non-Riemannian effective spacetime. An example is
given of non-Riemannian effective geometry of the rotational motion of the
superfluid vacuum around the vortex where the effective spacetime Cartan
torsion can be associated to the Hawking giving rise to a physical
interpretation of effective torsion recently introduced in the literature in
the form of an acoustic torsion in superfluid $^{4}He$ (PRD-70(2004),064004).
Curvature and torsion singularities of this $^{3}He-A$ fermionic superfluid are
investigated. This Lense-Thirring effective metric, representing the superfluid
vacuum in rotational motion, is shown not support Hawking radiation when the
isotropic $^{4}He$ is restored at far distances from the vortex axis. Hawking
radiation can be expressed also in topological solitons (moving domain walls)
in fermionic superfluids in non-Riemannian (teleparallel) $(1+1)$ dimensional
effective spacetime. A teleparallel solution is proposed where the
quasiparticle speed is determined from the teleparallel geometry.

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The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ