Generation of GHZ state and cluster state with atomic ensembles via the dipole–blockade mechanism

doi:10.1088/1674-1056/19/9/090316

Abstract This paper proposes scalable schemes to generate the Greenberger–Horne–Zeilinger (GHZ) state and the cluster state with atomic ensembles via the dipole blockade mechanism on an atom chip, where the qubit is not carried by a single atom but an atomic ensemble. In the protocols, multiqubit entangled states are determinately prepared. Needlessness for single-photon source further decreases the complexity of the experiment. Based on the present laboratory technique, the schemes may be realized. The achieved results reveal a prospect for large-scale quantum communication and quantum computation.

Keywords: dipole–blockade mechanism n-qubit GHZ state n-qubit cluster

Received: 22 October 2009
Revised: 19 December 2009
Accepted manuscript online:

PACS:	0367
	4250

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 60878059, 10947147, 60677044, and 10574022), the Natural Science Foundation of Fujian Province of China (Grant No. 2007J0002).

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Ni Bin-Bin(倪彬彬), Gu Yong-Jian(顾永建), Chen Xiao-Dong(陈晓东), Liang Hong-Hui(梁鸿辉), Lin Xiu(林秀), and Lin Xiu-Min(林秀敏) Generation of GHZ state and cluster state with atomic ensembles via the dipole–blockade mechanism 2010 Chin. Phys. B 19 090316

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Generation of GHZ state and cluster state with atomic ensembles via the dipole–blockade mechanism

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