Abstract
The determination of classical and quantum states through photon bunching and anti-bunching like phenomena may have potential applications in quantum information processing and long-distance quantum communications. We report the photon bunching and multi anti-bunching like phenomena by generating multi-order fluorescence and four-wave mixing (FWM) at room temperature using the Nitrogen-vacancy (NV) center in diamond. We have implied FWM process to demonstrate the interference pattern emerging from NV of nano-crystals in classical, nonclassical and intermediate (classical and nonclassical) regimes. Intersystem crossing is controlled by the fluence of incident beams. The interference pattern from dominant ionization of NV- to NVo and NVo to NV- suggests the bunching and anti-bunching like phenomena of photons, respectively.
Highlights
Second-order coherence known as two-photon bunching led the emergence of quantum optics.[1]The correlation and interference phenomena provide a solid foundation for development of quantum theory of photons.[2]
Paul Dirac considered the single photon interference in which superposition only comes from the photon itself[3] in the case of the generation of twin/paired photons, a similar statement can be established for interference of two photons, in which superposition comes from the pair of photons jointly measured sharing the same energy level as in multi-wave mixing (MWM).[4,5]
Photon bunching in the case of polarized beam splitters (PBS) has been demonstrated using diamond NV defects.[6]
Summary
Second-order coherence known as two-photon bunching led the emergence of quantum optics.[1]. The correlation and interference phenomena provide a solid foundation for development of quantum theory of photons.[2] Paul Dirac considered the single photon interference in which superposition only comes from the photon itself[3] in the case of the generation of twin/paired photons, a similar statement can be established for interference of two photons, in which superposition comes from the pair of photons jointly measured (analogous definition of Dirac) sharing the same energy level as in multi-wave mixing (MWM).[4,5] Recently, photon bunching in the case of polarized beam splitters (PBS) has been demonstrated using diamond NV defects.[6] The classical-to-quantum transition with FWM7 and classical and nonclassical bunching control by nonlinear response of the media[5,8] can be devised using FWM In this regard, due to stable photon emission[9] with high quantum efficiency[10] of nitrogen-vacancy (NV) color center, the negatively charged NV center in diamond is configured here with FWM process to realize the intersystem crossing (ISC) by changing the fluence of lasers, which can modify the nonlinear optical response of the media[5,8] in nano-diamond (ND)
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