Mapping a 50-spin-qubit network through correlated sensing

G. L. Stolpe, D. P. Kwiatkowski, C. E. Bradley, J. Randall, M. H. Abobeih, S. A. Breitweiser, L. C. Bassett, M. Markham, D. J. Twitchen and T. H. Taminiau ()
Additional contact information
G. L. Stolpe: Delft University of Technology
D. P. Kwiatkowski: Delft University of Technology
C. E. Bradley: Delft University of Technology
J. Randall: Delft University of Technology
M. H. Abobeih: Delft University of Technology
S. A. Breitweiser: University of Pennsylvania
L. C. Bassett: University of Pennsylvania
M. Markham: Harwell Oxford
D. J. Twitchen: Harwell Oxford
T. H. Taminiau: Delft University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Spins associated to optically accessible solid-state defects have emerged as a versatile platform for exploring quantum simulation, quantum sensing and quantum communication. Pioneering experiments have shown the sensing, imaging, and control of multiple nuclear spins surrounding a single electron spin defect. However, the accessible size of these spin networks has been constrained by the spectral resolution of current methods. Here, we map a network of 50 coupled spins through high-resolution correlated sensing schemes, using a single nitrogen-vacancy center in diamond. We develop concatenated double-resonance sequences that identify spin-chains through the network. These chains reveal the characteristic spin frequencies and their interconnections with high spectral resolution, and can be fused together to map out the network. Our results provide new opportunities for quantum simulations by increasing the number of available spin qubits. Additionally, our methods might find applications in nano-scale imaging of complex spin systems external to the host crystal.

Date: 2024
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DOI: 10.1038/s41467-024-46075-4

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