Up-, down- and sideways-conversion for quantum information
Paul G. Kwiat, Joseph B. Altepeter, Evan R. Jeffrey, Nicholas A. Peters, Aaron P. VanDevender · 2004
Frequency up- and down-conversion in nonlinear crystals enables several fundamental resources for optical quantum information, including on-demand single photons, entangled-photon states, and efficient conversion of photons’ quantum states from one wavelength to another