Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Passive, deterministic photonic CPHASE gate via two-level systems   We show that an array of identical two level systems coupled losslessly to a
one dimensional waveguide is able to realize a high fidelity conditional phase
shift useful for quantum logic. We propose two arrangements of emitters (one
that relies on direct interactions between the emitters, and one that does
not), and describe possible physical realizations and limitations.

7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th