Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Linear optics and projective measurements alone suffice to create
  large-photon-number path entanglement   We propose a method for preparing maximal path entanglement with a definite
photon number N, larger than two, using projective measurements. In contrast
with the previously known schemes, our method uses only linear optics.
Specifically, we exhibit a way of generating four-photon, path-entangled states
of the form |4,0> + |0,4>, using only four beam splitters and two detectors.
These states are of major interest as a resource for quantum interferometric
sensors as well as for optical quantum lithography and quantum holography.

27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph