Direct measurement of the concurrence for two-qubit electron spin entangled pure state based on charge detection
Liu Jionga), b) , Zhou Lana), c) , Sheng Yu-Bo†a), b) 
Direct measurement of the concurrence for two-qubit electron spin entangled pure state based on charge detection |
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Liu Jiong
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| Schematic diagram showing the principle of parity check measurement (PCM).[ 46 ] The two electron spin entangled states in spatial mode a and b pass through the first PBS, which will make the charger detector detect 0, 1, or 2 electrons. We can divide them into odd parity and even parity, which will be useful in our protocol. The second PBS is used to ensure that the two out ports (a″ and b″) own one electron, respectively. |
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