Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lower Bound on Entanglement of Formation for the Qubit-Qudit System   Wootters [PRL 80, 2245 (1998)] has derived a closed formula for the
entanglement of formation (EOF) of an arbitrary mixed state in a system of two
qubits. There is no known closed form expression for the EOF of an arbitrary
mixed state in any system more complicated than two qubits. This paper, via a
relatively straightforward generalization of Wootters' original derivation,
obtains a closed form lower bound on the EOF of an arbitary mixed state of a
system composed of a qubit and a qudit (a d-level quantum system, with d
greater than or equal to 3). The derivation of the lower bound is detailed for
a system composed of a qubit and a qutrit (d = 3); the generalization to d
greater than 3 then follows readily.

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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: econ
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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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: hep-lat
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The categories of this paper are: cond-mat
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: cs
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The categories of this paper are: physics