Fast, low-power manipulation of spin ensembles in superconducting microresonators

• Published in: Applied physics letters Vol. 104; no. 22
• Main Authors: Sigillito, A. J., Malissa, H., Tyryshkin, A. M., Riemann, H., Abrosimov, N. V., Becker, P., Pohl, H.-J., Thewalt, M. L. W., Itoh, K. M., Morton, J. J. L., Houck, A. A., Schuster, D. I., Lyon, S. A.
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 02-06-2014
• Subjects: Applied physics; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Coplanar waveguides; DILUTION; MAGNETIC FIELDS; MICROSTRUCTURE; MICROWAVE RADIATION; PULSES; QUANTUM COMPUTERS; Quantum computing; RANDOMNESS; Refrigerators; RESONATORS; SENSITIVITY; Signal averaging; SPIN; SUPERCONDUCTING DEVICES; Superconductivity; WAVEGUIDES
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.4881613

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.