Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective field theory approach to many-body localization   We construct an analytic theory of many-body localization (MBL) in random
spin chains. The approach is based on a first quantized perspective in which
MBL is understood as a localization phenomenon on the high dimensional lattice
defined by the discrete Hilbert space of the clean system. We construct a field
theory on that lattice and apply it to discuss the stability of a weak disorder
(`Wigner-Dyson') and a strong disorder (`Poisson') phase.

20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
3
The categories of this paper are: physics