Emission of Microwave Photon Pairs by a Tunnel Junction
Emission of Microwave Photon Pairs by a Tunnel Junction
Generation and control of non-classical electromagnetic fields is of crucial importance for quantum information physics. While usual methods for the production of such fields rely on a non-linearity (of a crystal, a Josephson junction, etc.), a recent experiment performed on a normal conductor, a tunnel junction under microwave irradiation, has …