Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Full Realization Scheme of the Tensor Product Space of N Distinguishable
  Photons in Two States   The ability to control and hence to realize a given number of photons is of
major interest from a fundamental point of view, e.g. Bell inequalities,
photons bunching. In recent years this interest has grown by the so-called the
"Second Quantum Revolution" where such an ability is needed for quantum
computers, etc. In this paper, we show that such a realization can not be done
by a unitary process. Therefore, a non-unitary interferometer is given to build
a full realization of the tensor product space for two photons at two states.
Finally, by modifying the previous interferometer, the full tonsorial product
space of N photons in two states is shown.

27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
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The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: atom-ph