Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Walks in artificial electric and gravitational Fields   The continuous limit of quantum walks (QWs) on the line is revisited through
a recently developed method. In all cases but one, the limit coincides with the
dynamics of a Dirac fermion coupled to an artificial electric and/or
relativistic gravitational field. All results are carefully discussed and
illustrated by numerical simulations.

15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess