TY - JOUR AU - Nguyen, Francois AU - Zakka-Bajjani, Eva AU - Aumentado, Jose AU - Simmonds, Raymond C2 - Nature DA - 2012-04-20 DO - https://doi.org/10.1103/PhysRevLett.108.163602 LA - en M1 - 108 PB - Nature PY - 2012 TI - Quantum interference between two single photons of different microwave frequencies ER -