High-visibility nonclassical interference between intrinsically pure heralded single photons and photons from a weak coherent field
Rui‐Bo Jin, Jun Zhang, Ryōsuke Shimizu, Nobuyuki Matsuda, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu · Physical Review A · 2011
We present an experiment of nonclassical interference between an intrinsically pure heralded single-photon state and a weak coherent state. Our experiment demonstrates that, without the use of bandpass filters, spectrally pure single photons can have high-visibility ($89.4\ifmmode\pm\else\textpm\fi{}0.5%$) interference with photons from a weak coherent field. Our scheme lays the groundwork for future experiments requiring quantum interference between photons in nonclassical states and those in coherent states.