Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Implementation of one-dimensional quantum walks on spin-orbital angular
  momentum space of photons   Photons can carry spin angular momentum (SAM) and orbital angular momentum
(OAM), which can be used to realize a qubit system and a high-dimension system
respectively. This spin-orbital system is very suitable for implementing
one-dimensional discrete-time quantum random walks. We propose a simple scheme
of quantum walks on the spin-orbital angular momentum space of photons, where
photons walk on the infinity OAM space controlled by their SAM. By employing
the recent invention of an optical device, the so-called 'q-plate', our scheme
is more simple and efficient than others because there is no Mach-Zehnder
interferometer in the scheme.

9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol