Author Affiliations

M. D. Mazurek,^1,2,* Y. Xiang,³ M. J. Stevens,¹ J. C. Bienfang,^4,5 M. A. Wayne,⁵ C. Abellán,⁶ W. Amaya,⁶ M. W. Mitchell,^6,7 R. P. Mirin,¹ S. W. Nam,¹ Q. He,³ L. K. Shalm,^1,2 and H. M. Wiseman⁸

¹NIST-National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA

²Department of Physics, 390 UCB, University of Colorado, Boulder, Colorado 80309, USA

³State Key Laboratory for Mesoscopic Physics, School of Physics, Nano-optoelectronics Frontier Center of the Ministry of Education & Collaborative Innovation Center of Quantum Matter, Peking University, Beijing 100871, China

⁴Joint Quantum Institute: University of Maryland and NIST, 100 Bureau Drive, Gaithersburg MD 20899, USA

⁵NIST, 100 Bureau Drive, Gaithersburg MD 20899, USA

⁶ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain

⁷ICREA-Institucio Catalana de Recerca i Estudis Avanc¸ats, 08010 Barcelona, Spain

⁸Centre for Quantum Computation and Communication Technology (Australian Research Council) & Centre for Quantum Dynamics, Griffith University, Brisbane, Queensland 4111, Australia

^*Corresponding author: michael.mazurek@nist.gov