Room temperature high-fidelity holonomic single-qubit gate on a solid-state spin

Silvia Arroyo-Camejo (), Andrii Lazariev, Stefan W. Hell () and Gopalakrishnan Balasubramanian
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Silvia Arroyo-Camejo: Max Planck Institute for Biophysical Chemistry
Andrii Lazariev: Max Planck Research Group Nanoscale Spin Imaging, Max Planck Institute for Biophysical Chemistry
Stefan W. Hell: Max Planck Institute for Biophysical Chemistry
Gopalakrishnan Balasubramanian: Max Planck Research Group Nanoscale Spin Imaging, Max Planck Institute for Biophysical Chemistry

Nature Communications, 2014, vol. 5, issue 1, 1-5

Abstract: Abstract At its most fundamental level, circuit-based quantum computation relies on the application of controlled phase shift operations on quantum registers. While these operations are generally compromised by noise and imperfections, quantum gates based on geometric phase shifts can provide intrinsically fault-tolerant quantum computing. Here we demonstrate the high-fidelity realization of a recently proposed fast (non-adiabatic) and universal (non-Abelian) holonomic single-qubit gate, using an individual solid-state spin qubit under ambient conditions. This fault-tolerant quantum gate provides an elegant means for achieving the fidelity threshold indispensable for implementing quantum error correction protocols. Since we employ a spin qubit associated with a nitrogen-vacancy colour centre in diamond, this system is based on integrable and scalable hardware exhibiting strong analogy to current silicon technology. This quantum gate realization is a promising step towards viable, fault-tolerant quantum computing under ambient conditions.

Date: 2014
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DOI: 10.1038/ncomms5870

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