Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum nonlocality without entanglement in a pair of qubits   We consider unambiguous discrimination of two separable bipartite states, one
being pure and the other being a rank-2 mixed state. There is a gap between the
optimal success probability under global measurements and the one achieved by
generalized measurements with separable measurement operators. We show that
even the latter success probability cannot be achieved via local operations and
classical communication, leaving a nonzero gap in between.

8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th