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Effective protocol for preparation of three-atom Greenberger-Horne-Zeilinger state and W state with the help of cross-Kerr nonlinearity

100%
Kang Y.-H., Xia Y., Lu P.-M.
Open Physics
|
2013
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vol. 11
|
issue 8
1030-1035
EN
We propose a protocol to generate a Greenberger-Horne-Zeilinger (GHZ) state andWstate by using simple linear elements and quantum nondemolition detectors (QNDs). With the help of cross-Kerr nonlinearity, our protocol can generate the intended states with only one setup, and the probability of getting a W state is greatly increased when compared with previous schemes [Phys. Rev. A 75 (2007) 044301]. Also, our proposed protocol is realizable in experiments.
2
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Quantum computation and entangled state generation through a cavity output process

100%
Xia Y., Hu C., Song J., Song H.-S.
Open Physics
|
2011
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vol. 9
|
issue 5
1255-1260
EN
We propose a protocol to realize quantum phase gates and generate entangled states between two atoms trapped in one cavity. In Lamb-Dick limits, it is not necessary to require coincidence detections, which will relax the conditions for the experimental realization. The protocol can be generalized to generate N-atom entangled states.
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