Subnatural-linewidth biphotons generated from a Doppler-broadened hot atomic vapor cell
Wednesday, October 19, 2016 - 10:32
in Physics & Chemistry
Entangled photon pairs, termed as biphotons, have been the benchmark tool for experimental quantum optics. The quantum-network protocols based on photon-atom interfaces have stimulated a great demand for single photons with bandwidth comparable to or narrower than the atomic natural linewidth. In the past decade, laser-cooled atoms have often been used for producing such biphotons, but the apparatus is too large and complicated for engineering.