Self-assembling hybrid diamond–biological quantum devices

Abstract

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 Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.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.

Protecting theSWAPoperation from general and residual errors by continuous dynamical decoupling

“…For instance, nitrogen vacancy (NV) centers in diamonds have recently been shown to be strong candidates for use in the field of quantum technologies, with possible applications ranging from biological systems to quantum computing protocols [39]. Furthermore, for reducing the damage of environmental perturbations in NV centers, the CDD procedure has again proven to be very important [40].…”

Nano-assembly of nanodiamonds by conjugation to actin filaments

“…We demonstrated that actin filament can be used as scaffold for building linear structures of NDs. Provided that we can optimize the size (ideally < 10 nm) of the diamond nanocrystals and the number of colour centres (ideally single NV centres) – which is not unrealistic for the current state‐of‐the art of diamond material science – our approach shows great promise towards the fabrication of quantum logic gates, memories and registers based on arrays of NV‐qubits and is an alternative to proposed DNA‐based assembly .…”

Nanodiamonds: From Synthesis and Purification to Deposition Techniques, Hybrids Fabrication and Applications

“…A new strategy based on self-assembly behavior of biological systems was applied to functionalized NDs [144]. Proteins can form 1D, 2D or 3D scaffolds on Fig.…”