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  1. 1 2009

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  1. 1 Zhu G.-Q.

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Average entanglement of spin 1 and 1/2 pair

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Zhu G.-Q.
Open Physics
|
2009
|
vol. 7
|
issue 1
135-140
EN
We study the entanglement features of the ground state of a system composed of spin 1 and 1/2 parts. In the light of the ground state degeneracy, the notion of average entanglement is used to measure the entanglement of the Hilbert subspace. The entanglement properties of both a general superposition as well as the mixture of the degenerate ground states are discussed by means of average entanglement and the negativity respectively.
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