Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Production of entanglement with highly-mixed states   We study production of entanglement with highly-mixed states. We find that
entanglement between highly mixed states can be generated via a direct unitary
interaction even when both states have purities arbitrarily close to zero. This
indicates that purity of a subsystem is not required for entanglement
generation. Our result is in contrast to previous studies where the importance
of the subsystem purity was emphasized.

35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
2
The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys