Physics – Quantum Physics
Scientific paper
2012-04-04
Physics
Quantum Physics
To appear in the Brazilian Journal of Physics
Scientific paper
Operator entanglement of two-qubit joint unitary operations is revisited. Schmidt number is an important attribute of a two-qubit unitary operation, and may have connection with the entanglement measure of the unitary operator. We found the entanglement measure of two-qubit unitary operators is classified by the Schmidt number of the unitary operators. The exact relation between the operator entanglement and the parameters of the unitary operator is clarified too.
Cao Zhuo-Liang
Li Chao
Xia Hui-Zhi
Yang Ming
Yang Qing
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