Author Affiliations

A. D. Quinn,¹ I. D. Moore,¹ W. C. Campbell,^2,3,4 E. R. Hudson,^2,3,4 S. J. Brudney,¹ A. A. Lesak,¹ J. M. Metzner,¹ D. J. Wineland,¹ and D. T. C. Allcock¹

¹Department of Physics, University of Oregon, Eugene, OR, USA

²Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, CA, USA

³Center for Quantum Science and Engineering, University of California Los Angeles, Los Angeles, CA, USA

⁴Challenge Institute for Quantum Computation, University of California Los Angeles, Los Angeles, CA, USA