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Bulletin of the American Physical Society

Ultra-low power microwave manipulation of electron spin ensembles

Anthony J. Sigillito, H. Malissa, A.M. Tyryshkin, S. A. Lyon

Published Mar 3, 2014• 0 citations
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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 3×104spins/Hz with averaging.
This project is concerned with ultra-sensitive characterization of the interaction of microwave and optical transitions in atomic clouds and solid materials. Microwave Electron Spin Resonance spectroscopy is performed on low loss ferromagnetics and paramagnetic, rare-earth impurity ions in crystal lattices, searching for systems capable of strong coupling. In the optical regime, laser-cooled and trapped neutral Ytterbium atoms are spectroscopically studied with an aim to develop an optical lattice clock for the international Atomic Clock Ensemble in Space mission. This expertise is developing enabling techno logy towards optical coupling to crystals, targeting microwave-optical quantum conversion applications within a hybrid quantum system paradigm.