作者: A. V. Burlakov , M. V. Chekhova , D. N. Klyshko , S. P. Kulik , A. N. Penin
关键词: Spectroscopy 、 Nonlinear system 、 Parametric statistics 、 Interference (wave propagation) 、 Scattering 、 Phase (waves) 、 Beam (structure) 、 Molecular physics 、 Quantum mechanics 、 Physics 、 Quantum
摘要: Two types of interference were observed using two-photon spontaneous parametric radiation from two nonlinear interaction regions. experimental setups analogous to the Young and Mach-Zehnder interferometers used. An interesting feature is opposite conditions for its observation by different methods: measuring intensity light at a single frequency correlation intensities conjugated frequencies (method coincidences). Two-photon resembles Ramsey method separated fields, which used in beam spectroscopy. A simple macroscopic quantum model agrees well with results enables their interpretation terms ``biphotons'' carrying information about pump phase.