1. Institute for Research in Electronics and Applied Physics and Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, United States
2. Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20740, United States
3. Peter-Grünberg-Institute (PGI-10), Forschungszentrum Jülich GmbH, Jülich 52425, Germany
4. JARA-FIT (Fundamentals of Future Information Technology), Jülich-Aachen Research Alliance, Aachen 52062, Germany
5. Peter-Grünberg-Institute (PGI-9), Forschungszentrum Jülich GmbH, Jülich 52425, Germany