Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-energy effective theory in the bulk for transport in a topological
  phase   We construct a low-energy effective action for a two-dimensional
non-relativistic topological (i.e.\ gapped) phase of matter in a continuum,
which completely describes all of its bulk electrical, thermal, and
stress-related properties in the limit of low frequencies, long distances, and
zero temperature, without assuming either Lorentz or Galilean invariance. This
is done by generalizing Luttinger's approach to thermoelectric phenomena, via
the introduction of a background vielbein (i.e.\ gravitational) field and spin
connection a la Cartan, in addition to the electromagnetic vector potential, in
the action for the microscopic degrees of freedom (the matter fields).
Crucially, the geometry of spacetime is allowed to have timelike and spacelike
torsion. These background fields make all natural invariances--- under U(1)
gauge transformations, translations in both space and time, and spatial
rotations---appear locally, and corresponding conserved currents and the stress
tensor can be obtained, which obey natural continuity equations. On integrating
out the matter fields, we derive the most general form of a local bulk induced
action to first order in derivatives of the background fields, from which
thermodynamic and transport properties can be obtained. We show that the gapped
bulk cannot contribute to low-temperature thermoelectric transport other than
the ordinary Hall conductivity; the other thermoelectric effects (if they
occur) are thus purely edge effects. The coupling to "reduced" spacelike
torsion is found to be absent in minimally-coupled models, and using a
generalized Belinfante stress tensor, the stress response to time-dependent
vielbeins (i.e.\ strains) is the Hall viscosity, which is robust against
perturbations and related to the spin current as in earlier work.

12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph