Quantum Fourier transform for quantum sensing
Abstract
The Quantum Fourier Transformation () is a key building block for a whole wealth of quantum algorithms. Despite its proven efficiency, only a few proof-of-principle demonstrations have been reported. Here we utilize to enhance the performance of a quantum sensor. We implement the algorithm in a hybrid quantum register consisting of a nitrogen-vacancy (NV) center electron spin and three nuclear spins. The runs on the nuclear spins and serves to process the sensor - NV electron spin signal. We demonstrate for quantum (spins) and classical signals (radio frequency (RF) ) with near Heisenberg limited precision scaling. We further show the application of for demultiplexing the nuclear magnetic resonance (NMR) signal of two distinct target nuclear spins. Our results mark the application of a complex quantum algorithm in sensing which is of particular interest for high dynamic range quantum sensing and nanoscale NMR spectroscopy experiments.
Cite
@article{arxiv.2008.09716,
title = {Quantum Fourier transform for quantum sensing},
author = {Vadim Vorobyov and Sebastian Zaiser and Nikolas Abt and Jonas Meinel and Durga Dasari and Philipp Neumann and Jörg Wrachtrup},
journal= {arXiv preprint arXiv:2008.09716},
year = {2021}
}