Quantum Non-Demolition Bell State Measurement and N-party GHZ State Preparation in Quantum Dot

Details Quantum Non-Demolition Bell State Measurement and N-party GHZ State Preparation in Quantum Dot Quantum Non-Demolition Bell State Measurement and N-party GHZ State Preparation in Quantum Dot

2005-11-28

arxiv.org/abs/quant-ph/0511242v4

Modern Physics Letters B Vol 21, No. 14 (2007) 867-874

Physics

Quantum Physics

some modification to introduction and some details are added

Scientific paper

10.1142/S0217984907013237

By exploiting the fermionic qubit parity measurement, we present a scheme to realize quantum non-demolition (QND) measurement of Bell-states and generate n-party GHZ state in quantum dot. Compared with the original protocol, the required electron transfer before and after parity measurement can be nonadiabatic, which may speed up the operation speed and make the omitting of spin-orbit interaction more reasonable. This may help us to construct CNOT gate without highly precise control of coupling as the way of D. Gottesman and I. L. Chuang.

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