Room-temperature control and electrical readout of individual nitrogen-vacancy nuclear spins

Michal Gulka (), Daniel Wirtitsch, Viktor Ivády, Jelle Vodnik, Jaroslav Hruby, Goele Magchiels, Emilie Bourgeois, Adam Gali, Michael Trupke and Milos Nesladek ()
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Michal Gulka: Hasselt University
Daniel Wirtitsch: University of Vienna
Viktor Ivády: Wigner Research Centre for Physics
Jelle Vodnik: Hasselt University
Jaroslav Hruby: Hasselt University
Goele Magchiels: Hasselt University
Emilie Bourgeois: Hasselt University
Adam Gali: Wigner Research Centre for Physics
Michael Trupke: University of Vienna
Milos Nesladek: Hasselt University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract Nuclear spins in semiconductors are leading candidates for future quantum technologies, including quantum computation, communication, and sensing. Nuclear spins in diamond are particularly attractive due to their long coherence time. With the nitrogen-vacancy (NV) centre, such nuclear qubits benefit from an auxiliary electronic qubit, which, at cryogenic temperatures, enables probabilistic entanglement mediated optically by photonic links. Here, we demonstrate a concept of a microelectronic quantum device at ambient conditions using diamond as wide bandgap semiconductor. The basic quantum processor unit – a single 14N nuclear spin coupled to the NV electron – is read photoelectrically and thus operates in a manner compatible with nanoscale electronics. The underlying theory provides the key ingredients for photoelectric quantum gate operations and readout of nuclear qubit registers. This demonstration is, therefore, a step towards diamond quantum devices with a readout area limited by inter-electrode distance rather than by the diffraction limit. Such scalability could enable the development of electronic quantum processors based on the dipolar interaction of spin-qubits placed at nanoscopic proximity.

Date: 2021
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DOI: 10.1038/s41467-021-24494-x

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