Author： Zhou Lan Sheng Yu-Bo
Publisher： MDPI
E-ISSN： 1099-4300|17|6|4293-4322
ISSN： 1099-4300
Source： Entropy, Vol.17, Iss.6, 2015-06, pp. : 4293-4322
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Abstract
Concurrence provides us an effective approach to quantify entanglement, which is quite important in quantum information processing applications. In the paper, we mainly review some direct concurrence measurement protocols of the two-qubit optical or atomic system. We first introduce the concept of concurrence for a two-qubit system. Second, we explain the approaches of the concurrence measurement in both a linear and a nonlinear optical system. Third, we introduce some protocols for measuring the concurrence of the atomic entanglement system.
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