Conditional preparation of single photons using parametric downconversion: a recipe for purity
Conditional preparation of single photons using parametric downconversion: a recipe for purity
In an experiment reported recently (Mosley et al 2008 Phys. Rev. Lett. 100 133601), we demonstrated that, through group velocity matched parametric downconversion, heralded single photons can be generated in pure quantum states without spectral filtering. The technique relies on factorable photon pair production, initially developed theoretically in the strict …