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A Simplified and Obvious Expression of Concurrence in Wootters’Measure of Entanglement of a Pair of Qubits |
| WANG An-Min |
| Institute for Theoretical Physics, Department of Modern Physics,
University of Science and Technology of China, Hefei 230026 |
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| Cite this article: |
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WANG An-Min 2003 Chin. Phys. Lett. 20 1907-1909 |
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Abstract We obtain a simplified and obvious expression of“concurrence” in Wootters’measure of entanglement of a pair of qubits having no more than two non-zero eigenvalues in terms of concurrences of eigenstates and their simple combinations. It not only simplifies the calculation of Wootters’measure of entanglement, but also reveals some general and important features. Our conclusions are helpful to further understand and application of quantum entanglement.
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| Keywords:
03.65.Ud 03.67.-a
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Published: 01 November 2003
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