Andreas Albrecht, Alex Retzker, Guy Koplovitz, Fedor Jelezko, Shira Yochelis, Danny Porath, Yuval Nevo, Oded Shoseyov, Yossi Paltiel, Martin B. Plenio
Scalable arrangements of nitrogen vacancy centers in diamond remain an open key challenge on the way to efficient quantum information processing, quantum simulation and magnetic sensing applications at the quantum limit. Although technologies based on implanting NV centers in bulk diamond or hybrid device approaches have been developed, they are limited in the achievable spatial resolution or by the intricate complexity, respectively. Here we provide an alternative solution for creating a scalable system of individually addressable NV centers based on the self-assembling capabilities of biological systems. By using surface functionalized nanodiamonds we propose a new avenue to bridging the bio-nano interface. Taking benefit of the outstanding nanometer resolution of the bio self-assembling techniques together with the controlled creation of spatial structures paves the way towards numerous multiqubit applications. We provide a detailed theoretical analysis on the feasibility of multiqubit quantum operations in one and two dimensional nanodiamond arrays, exploiting the significant dipolar coupling on the nanometer scale and address the problems of decoherence, imperfect couplings and the randomness of the relative orientations of the NV center symmetry axes. We show that our scheme allows for the high-fidelity creation of entanglement, cluster states and quantum simulation applications. In addition we present first experimental demonstrations of interconnecting nanodiamonds using biological protein complexes.
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http://arxiv.org/abs/1301.1871
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