We demonstrate the use of high-Q superconducting coplanar waveguide (CPW) microresonators to perform rapid manipulations on a randomly distributed spin ensemble using very low microwave power (400 nW). This power is compatible with dilution refrigerators, making microwave manipulation of spin ensembles feasible for quantum computing applications. We also describe the use of adiabatic microwave pulses to overcome microwave magnetic field (B1) inhomogeneities inherent to CPW resonators. This allows for uniform control over a randomly distributed spin ensemble. Sensitivity data are reported showing a single shot (no signal averaging) sensitivity to 107 spins or 3×104 spins/Hz with averaging.
@article{arxiv.1403.0018,
title = {Fast, low-power manipulation of spin ensembles in superconducting microresonators},
author = {Anthony J. Sigillito and Hans Malissa and Alexei M. Tyryshkin and Helge Riemann and Nikolai V. Abrosimov and Peter Becker and Hans-Joachim Pohl and Mike L. W. Thewalt and Kohei M. Itoh and John J. L. Morton and Andrew A. Houck and David I. Schuster and S. A. Lyon},
journal= {arXiv preprint arXiv:1403.0018},
year = {2014}
}