Vibration-induced field fluctuations in a superconducting magnet

J. W. Britton, J. G. Bohnet, B. C. Sawyer, H. Uys, M. J. Biercuk, and J. J. Bollinger
Phys. Rev. A 93, 062511 – Published 27 June 2016

Abstract

Superconducting magnets enable precise control of nuclear and electron spins, and are used in experiments that explore biological and condensed-matter systems, and fundamental atomic particles. In high-precision applications, a common view is that slow (<1Hz) drift of the homogeneous magnetic-field limits control and measurement precision. We report on previously undocumented higher-frequency field noise (10–200 Hz) that limits the coherence time of Be+9 electron-spin qubits in the 4.46T field of a superconducting magnet. We measure a spin-echo T2 coherence time of 6ms for the Be+9 electron-spin resonance at 124GHz, limited by part-per-billion fractional fluctuations in the magnet's homogeneous field. Vibration isolation of the magnet improved T2 to 50 ms.

  • Figure
  • Figure
  • Figure
  • Figure
  • Received 8 March 2016

DOI:https://doi.org/10.1103/PhysRevA.93.062511

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalCondensed Matter, Materials & Applied PhysicsInterdisciplinary Physics

Authors & Affiliations

J. W. Britton1,2,*, J. G. Bohnet1, B. C. Sawyer3, H. Uys4, M. J. Biercuk5, and J. J. Bollinger1

  • 1Time and Frequency Division, National Institute of Standards and Technology, Boulder, Colorado 80305, USA
  • 2Army Research Lab, Adelphi, Maryland 20783, USA
  • 3Georgia Tech Research Institute, Atlanta, Georgia 30332, USA
  • 4Department of Physics, Stellenbosch University, 7600 Stellenbosch, South Africa and National Laser Centre, Council for Scientific and Industrial Research, Brummeria, 0184 Pretoria, South Africa
  • 5ARC Center for Engineered Quantum Systems, School of Physics, The University of Sydney, NSW 2006 Australia

  • *joe.britton@gmail.com

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 93, Iss. 6 — June 2016

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×