Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Concurrence for a two-qubits mixed state consisting of three pure states
  in the framework of SU(2) coherent states   A simplified expression of concurrence for two-qubit mixed state having no
more than three non-vanishing eigenvalues is obtained. Basing on SU(2) coherent
states, the amount of entanglement of two-qubit pure states is studied and
conditions for entanglement are calculated by formulating the measure in terms
of some new parameters (amplitudes of coherent states). This formalism is
generalized to the case of two-qubit mixed states using the simplified
expression of concurrence.

27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat