Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polynomial invariants and Bell inequalities as entanglement measure of
  4-qubit states   We compare the polynomial invariants for four qubits introduced by Luque and
Thibon, PRA {\bf 67}, 042303 (2003), with optimized Bell inequalities and a
combination of two qubit concurrences. It is shown for various parameter
dependent states from different SLOCC classes that it is possible to measure a
genuine 4-qubit entanglement with these polynomials.

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The categories of this paper are: adap-org
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The categories of this paper are: cs
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio