Abstract
Multipartite concatenated Greenberger–Horne–Zeilinger (C-GHZ) states, a class of multipartite entangled states, have superior stability under the influence of decoherence. We propose two means of constructing multiphoton C-GHZ states based on entanglers of multiphoton GHZ states that are both experimentally realizable and scalable. Given a -photon GHZ state as an input state, if is odd, one can create a -photon C-GHZ state. In addition, we have designed a scheme to prepare -photon C-GHZ states from single-photon states by using entanglers of -photon GHZ states and -control Toffoli gates.
© 2013 Optical Society of America
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