Entanglement of a pair of quantum bits
Entanglement of a pair of quantum bits
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DOI:
10.1103/physrevlett.78.5022
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发表时间:
1997-06-30
影响因子:
8.6
通讯作者:
Wootters, WK
中科院分区:
文献类型:
--
作者:
Hill, S;Wootters, WK
The ''entanglement of formation'' of a mixed state rho of a bipartite quantum system can be defined as the minimum;number of singlets needed to create an ensemble of pure states that represents rho. We find an exact formula for the entanglement of formation for all mixed states of two qubits having no more than two nonzero eigenvalues, and we report evidence suggesting that the formula is valid for all states of this system.