Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonrelativistic String Theory and T-Duality   Nonrelativistic string theory in flat spacetime is described by a
two-dimensional quantum field theory with a nonrelativistic global symmetry
acting on the worldsheet fields. Nonrelativistic string theory is unitary,
ultraviolet complete and has a string spectrum and spacetime S-matrix enjoying
nonrelativistic symmetry. The worldsheet theory of nonrelativistic string
theory is coupled to a curved spacetime background and to a Kalb-Ramond
two-form and dilaton field. The appropriate spacetime geometry for
nonrelativistic string theory is dubbed string Newton-Cartan geometry, which is
distinct from Riemannian geometry. This defines the sigma model of
nonrelativistic string theory describing strings propagating and interacting in
curved background fields. We also implement T-duality transformations in the
path integral of this sigma model and uncover the spacetime interpretation of
T-duality. We show that T-duality along the longitudinal direction of the
string Newton-Cartan geometry describes relativistic string theory on a
Lorentzian geometry with a compact lightlike isometry, which is otherwise only
defined by a subtle infinite boost limit. This relation provides a first
principles definition of string theory in the discrete light cone quantization
(DLCQ) in an arbitrary background, a quantization that appears in
nonperturbative approaches to quantum field theory and string/M-theory, such as
in Matrix theory. T-duality along a transverse direction of the string
Newton-Cartan geometry equates nonrelativistic string theory in two distinct,
T-dual backgrounds.

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The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an