One-Step Generation of Multiqubit Greenberger—Horne—Zeilinger States in a Driven Circuit QED System
J. C. Huang, Wei Nie, Lian-Fu Wei
We propose an efficient scheme to generate multiqubit Greenberger—Horne—Zeilinger (GHZ) states by one-step quantum operation in a driven circuit quantum electrodynamics (QED) system. Our proposal is based on a unitary evolution exp[−iλS 2 x ], with S x being the collective spin operator in x direction and λ a controllable parameter, induced by driving the resonator. The quantum operation avoids resonator-field decay and may achieve the GHZ states with ideal success probability. The feasibility with the experimentally-demonstrated circuit QED system is also discussed.
Communications in Theoretical Physics•Dec 1, 2011•1 citation