摘要We propose a scheme for generating an N-atom cluster state via cavity quantum electrodynamics (CQED). In our scheme, there is no transfer of quantum information between the atoms and the cavity, i.e., the cavity is always in the vacuum state, so the cavity decay can be suppressed. Also, the generated cluster state is the entanglement of the ground states, so the atomic spontaneous emission can be avoided. Therefore, the cluster state generated in our scheme has a longer lifetime. Furthermore, the requirement on the quality factor of the cavity greatly loosened for the cavity is only virtually excited.
Abstract：We propose a scheme for generating an N-atom cluster state via cavity quantum electrodynamics (CQED). In our scheme, there is no transfer of quantum information between the atoms and the cavity, i.e., the cavity is always in the vacuum state, so the cavity decay can be suppressed. Also, the generated cluster state is the entanglement of the ground states, so the atomic spontaneous emission can be avoided. Therefore, the cluster state generated in our scheme has a longer lifetime. Furthermore, the requirement on the quality factor of the cavity greatly loosened for the cavity is only virtually excited.
(Entanglement measures, witnesses, and other characterizations)
引用本文:
DU Gang;LAI Bo-Hui;YU Ya-Fei;ZHANG Zhi-Ming. Schemes for Generating Cluster States via Cavity Systems[J]. 中国物理快报, 2009, 26(10): 104201-104201.
DU Gang, LAI Bo-Hui, YU Ya-Fei, ZHANG Zhi-Ming. Schemes for Generating Cluster States via Cavity Systems. Chin. Phys. Lett., 2009, 26(10): 104201-104201.
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2009, Vol. 26 
