Effective scheme for $$W$$ W -state fusion with weak cross-Kerr nonlinearities

Effective scheme for $$W$$ W -state fusion with weak cross-Kerr nonlinearities We propose a effective $$W$$ W -state fusion scheme with the help of weak cross-Kerr nonlinearities, which can fuse a $$n$$ n -qubit $$W$$ W state and a $$m$$ m -qubit $$W$$ W state to a $$(m+n-1)$$ ( m + n - 1 ) -qubit state without an ancillary photon. Specially, the present scheme can fuse two Bell states to create a three-qubit $$W$$ W state. We analyze the resource cost and the success probability of the scheme. The analysis shows that the present scheme requires less resource cost compared with the previous ones and can be achieved with high probability under the current experiment technology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Effective scheme for $$W$$ W -state fusion with weak cross-Kerr nonlinearities

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Springer US
Copyright © 2015 by Springer Science+Business Media New York
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
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