Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Experimental implementation of the optimal linear-optical controlled
  phase gate   We report on the first experimental realization of optimal linear-optical
controlled phase gates for arbitrary phases. The realized scheme is entirely
flexible in that the phase shift can be tuned to any given value. All such
controlled phase gates are optimal in the sense that they operate at the
maximum possible success probabilities that are achievable within the framework
of any postselected linear-optical implementation. The quantum gate is
implemented using bulk optical elements and polarization encoding of qubit
states. We have experimentally explored the remarkable observation that the
optimum success probability is not monotone in the phase.

0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con