Cluster-state preparation in thermal cavities without single-qubit operation
Zhang Xiao-Long(张小龙)a)b)c), Feng Mang(冯芒)b), and Gao Ke-Lin(高克林)b)
a Center for Modern Physics and Department of Physics, Chongqing University, Chongqing 400044, China；b State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; cGraduate School of the Chinese Academy of Sciences, Beijing 100080, China
Abstract A potential scheme is proposed for generating cluster states of many atoms in cavity quantum electradynamics (QED), in which an unorthodox encoding is employed with the ground state being qubit $\left\vert 0\right\rangle $ while two closely spaced upper states being qubit $\left\vert 1\right\rangle $. Throughout the scheme the cavities can be in thermal states but are only virtually excited. We show how to create the cluster states by performing a two-step but no single-qubit operation. Discussion is also carried out on the experimental feasibility of our scheme.
(Quantum computation architectures and implementations)
Fund: Project supported by the National
Natural Science Foundation of China ( Grant Nos 10474118 and
60490280), the Hubei Provincial Foundation for distinguished
scholars, and the National Basic Research Program of China (Grant
Nos 2005CB724502 and 2006CB921203
Cite this article:
Zhang Xiao-Long(张小龙), Feng Mang(冯芒), and Gao Ke-Lin(高克林) Cluster-state preparation in thermal cavities without single-qubit operation 2008 Chin. Phys. B 17 43
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