热原子系统四波混频制备双光子对

热原子系统四波混频制备双光子对恩AbstractThe hot atom ensemble is an efficient system for generating quantum light sources.Thehigh count-rate quantum light source is the basis of studying quantum optics and quantumcommunication.The traditional and most commonly used methods for preparing two photons areparametric down-conversion of second-order nonlinear effects in nonlinear crystals andfour-wave mixing of third-order nonlinear effects in silicon-based materials (such as opticalfibers and nanomicrorings,etc.).The quantum light sources prepared by these methods have highbrightness,but short coherence time (sub-PS magnitude).Spontaneous four-wave mixing inatomic systems has been studied extensively in recent years.The spontaneous four-wave mixinghas been realized in both cold and hot atomic systems,and such a light source has a longcoherence time (n order),which naturally matches the linewidths of the atomic transition lines,and can be used for quantum storage in atom-based systems.Compared with the cold atomsystem,which requires vacuum pumping and complex optical paths and control systems such asmagneto-optical traps,the hot atom system is simpler and easier to operate,and can be easilymatched with the quantum dots.In this paper,the synthesis of quantum light source by four-wave mixing in a hot atomicsystem is studied.A two-photon pair with narrow linewidth matching the quantum dot lightsource is prepared theoretically.Key words:Hot Atom System,Quantum Light Source,Four-Wave Mixing Basic Principle,Experimental System For Preparation Of Single Photon Source