Journal
NEW JOURNAL OF PHYSICS
Volume 16, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/16/9/093002
Keywords
nitrogen vacancy center; nanodiamonds; self-assembling
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Funding
- Alexander von Humboldt Foundation
- BMBF project QuOReP [FK 01BQ1012]
- EU STREP projects DIAMANT and EQuaM
- EU Integrating project DIADEMS
- ERC Synergy grant BioQ
- GIF project 'Nonlinear dynamics in ultra-cold trapped ion crystals'
- DARPA (QuASAR project)
- DFG [SPP 1601/1, CU 44/3-2]
- Taiwan Academia Sinica Research Program on Nanoscience and Nanotechnology 'Bio-inspired organic/inorganic hybrid nano electronic devices'
- Peter Brojde Center for Innovative Engineering and Computer Science
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The realization of scalable arrangements of nitrogen vacancy (NV) centers in diamond remains a key challenge on the way towards efficient quantum information processing, quantum simulation and quantum sensing applications. Although technologies based on implanting NV-centers in bulk diamond crystals or hybrid device approaches have been developed, they are limited by the achievable spatial resolution and by the intricate technological complexities involved in achieving scalability. We propose and demonstrate a novel approach for creating an arrangement of NV-centers, based on the self-assembling capabilities of biological systems and their beneficial nanometer spatial resolution. Here, a self-assembled protein structure serves as a structural scaffold for surface functionalized nanodiamonds, in this way allowing for the controlled creation of NV-structures on the nanoscale and providing a new avenue towards bridging the bio-nano interface. One-, two- as well as three-dimensional structures are within the scope of biological structural assembling techniques. We realized experimentally the formation of regular structures by interconnecting nanodiamonds using biological protein scaffolds. Based on the achievable NV-center distances of 11 nm, we evaluate the expected dipolar coupling interaction with neighboring NV-centers as well as the expected decoherence time. Moreover, by exploiting these couplings, we provide a detailed theoretical analysis on the viability of multiqubit quantum operations, suggest the possibility of individual addressing based on the random distribution of the NV intrinsic symmetry axes and address the challenges posed by decoherence and imperfect couplings. We then demonstrate in the last part that our scheme allows for the high-fidelity creation of entanglement, cluster states and quantum simulation applications.
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