1Quantum Optics and Quantum Information Group, Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, vul. Metrolohichna 14-b, Kyiv 03143, Ukraine
2Department of Physics and Applied Physics, Yale University, P.O. Box 208120, New Haven, Connecticut 06520-8120, USA
3Yale Quantum Institute, 17 Hillhouse Avenue, P.O. Box 208334, New Haven, Connecticut 06520-8263, USA