Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complete Correlation, Detection loophole and Bell's Theorem   Two new formulations of Bell's theorem are given here. First, we consider a
definite set of two entangled photons with only two polarization directions,
for which Bell's locality assumption is violated for the case of perfect
correlation. Then, using a different approach, we prove an efficient Bell-type
inequality which is violated by some quantum mechanical predictions,
independent of the efficiency factors.

5
The categories of this paper are: gr-qc
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics