Author Affiliations

Thomas P. Purdy,^1,* Karen E. Grutter,² Kartik Srinivasan,² Nikolai N. Klimov,^1,3 Zeeshan Ahmed,³ and Jacob M. Taylor^1,4

¹Joint Quantum Institute, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA

²Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA

³Thermodynamic Metrology Group, Sensor Science Division, Physical Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899

⁴Joint Center for Quantum Information and Computer Science, University of Maryland, College Park, MD 20742, USA

^*Corresponding author: thomas.purdy@nist.gov