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Comment on "Entanglement Measure for Composite Systems"

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arxiv quant-ph/0309035 v1 pith:K52DURWV submitted 2003-09-03 quant-ph

Comment on "Entanglement Measure for Composite Systems"

classification quant-ph
keywords entanglementmeasureantibosecompositecondensationidenticalparticles
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A recent paper claimed to give an entanglement measure for composite systems, including Bose condensation and superconductivity. It is not an entanglement measure. It does not distinguish entanglement and non-factorization merely due to (anti)symmetrization for identical particles. In fact, the nature of entanglement, beyond the effect of (anti)symmetrization, in important states of many identical particles such as Bose condensation and superconductivity, had already been studied earlier.

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