Abstract This paper proposes two simple and robust schemes to generate an atomic-ensemble Greenberger--Horne--Zeilinger-type (GHZ-type) entangled state via linear optics and single photon detection. These schemes are based on two-photon Hong--Ou--Mandel-type interference, therefore they are insensitive to the phase fluctuation. This advantage will make the realizations of these two schemes easier. One scheme can scale efficiently with the number of ensembles because of the used quantum memory. Both schemes are also robust to the noise and within the reach of current technology.
Received: 26 December 2008
Revised: 13 January 2009
Accepted manuscript online:
Fund: Project supported by National
Natural Science Foundation of China (Grant Nos 10674126 and
10874171), National Fundamental Research Program of China (Grant Nos
2006CB921900 and 2009CB929601), the Innovation Fund from CAS,
Program for NCET, and Internationa
Cite this article:
Lu Xiao-Song(陆小松), Shi Bao-Sen(史保森), and Guo Guang-Can(郭光灿) Probabilistic and robust preparation of a GHZ-type state via atomic ensembles and linear optics 2009 Chin. Phys. B 18 5133
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