One-step implementation of multiqubit conditional phase gating with nitrogen-vacancy centers coupled to a high-Q silica microsphere cavity

Yang, W. L.; Yin, Z. Q.; Xu, Z. Y.; Feng, M.; Du, J. F.
June 2010
Applied Physics Letters;6/14/2010, Vol. 96 Issue 24, p241113
Academic Journal
The diamond nitrogen-vacancy (NV) center is an excellent candidate for quantum information processing, whereas entangling separate NV centers is still of great experimental challenge. We propose a one-step conditional phase flip with three NV centers coupled to a whispering-gallery mode cavity by virtue of the Raman transition and smart qubit encoding. As decoherence is much suppressed, our scheme could work for more qubits. The experimental feasibility is justified.


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