Nonclassical photon pairs from warm atomic vapor using a single driving laser

Abstract

Generation of nonclassical light is an essential tool for quantum optics research and applications in quantum information technology. We present realization of the source of nonclassically correlated photon pairs based on the process of spontaneous four-wave-mixing in warm atomic vapor. Atoms are excited only by a single laser beam in retro-reflected configuration and narrowband frequency filtering is employed for selection of correlated photon pairs. Nonclassicality of generated light fields is proved by analysis of their statistical properties. Measured parameters of the presented source promise further applicability for efficient interaction with atomic ensembles.

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• High nonclassical correlations of large-bandwidth photon pairs generated in warm atomic vapor
• Degenerate four-wave mixing as a low-power source of squeezed light
• Ideal pairing of the Stokes and anti-Stokes photons in the Raman process
• Taming numerical errors in simulations of continuous variable non-Gaussian state preparation
• Protecting Heralded Single Photons Generated from Double-$\Lambda$ Biphoton Sources with Doppler-Broadened Atomic Media
• Experimental study of matter-wave four-wave mixing in ${}^{39}$K Bose-Einstein condensates with tunable interaction