We study quantum interference effects of a qubit whose energy levels are continuously modulated. The qubit is formed by an impurity electron spin in a silicon tunneling field-effect transistor, and it is read out by spin blockade in a double-dot configuration. The qubit energy levels are modulated via its gate-voltage-dependent g-factors, with either rectangular, sinusoidal, or ramp radio-frequency waves. The energy-modulated qubit is probed by the electron spin resonance. Our results demonstrate the potential of spin qubit interferometry implemented in a silicon device and operated at a relatively high temperature.
@article{arxiv.1809.02326,
title = {Quantum interferometry with a g-factor-tunable spin qubit},
author = {K. Ono and S. N. Shevchenko and T. Mori and S. Moriyama and Franco Nori},
journal= {arXiv preprint arXiv:1809.02326},
year = {2019}
}
Comments
18 pages with 10 figures, including Supplemental Material