1. Raytheon BBN Technologies 1 , Cambridge, Massachusetts 02138, USA
2. Department of Physics, Harvard University 2 , Cambridge, Massachusetts 02138, USA
3. Currently with Aliro Quantum 3 , Brighton, Massachusetts 02135, USA
4. Raytheon 4 , El Segundo, California 90245, USA
5. John A. Paulson School of Engineering and Applied Sciences, Harvard University 5 , Cambridge, Massachusetts 01238, USA