1. Department of Physics, Harvard University, Cambridge, MA 02138, USA.
2. QuEra Computing Inc., Boston, MA 02135, USA.
3. IST Austria, Am Campus 1, 3400 Klosterneuburg, Austria.
4. Department of Physics, Stanford University, Stanford, CA 94305, USA.
5. Department of Physics, University of California Berkeley, Berkeley, CA 94720, USA.
6. Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.