Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenology of Space-time Imperfection I: Nonlocal Defects   If space-time is emergent from a fundamentally non-geometric theory it will
generically be left with defects. Such defects need not respect the locality
that emerges with the background. Here, we develop a phenomenological model
that parameterizes the effects of nonlocal defects on the propagation of
particles. In this model, Lorentz-invariance is preserved on the average. We
derive constraints on the density of defects from various experiments.

13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg