We observe narrow band pairs of time-correlated photons of wavelengths 776 and 795 nm
from nondegenerate four-wave mixing in a laser-cooled atomic ensemble of Rb 87 using a …

Entangled photon pairs, termed as biphotons, have been the benchmark tool for
experimental quantum optics. The quantum-network protocols based on photon–atom …

The preservation of quantum correlations requires optimal procedures and the proper
design of the transmitting channels. In this regard, we address designing a hybrid channel …

Nonlinear optics has been a very dynamic field of research with spectacular phenomena
discovered mainly after the invention of lasers. The combination of high intensity fields with …

Narrowband single photons that couple well to atomic ensembles could prove essential for
future quantum networks, but the efficient generation of such photons remains an …

We report a polarization-entangled photon-pair source obtained via spontaneous four-wave
mixing (SFWM) in a Doppler-broadened atomic ensemble of R 87 b atoms using a Sagnac …

We report a bright photon-pair source with a coincidence counting rate per input power
(cps/mW) of tens of thousands, obtained via spontaneous four-wave mixing from a Doppler …

We experimentally demonstrate two-photon interference of a time-energy entangled photon
pair generated via collective two-photon coherence in Doppler-broadened cascade-type Rb …

We utilized the all-copropagating scheme, which maintains the phase-match condition, in
the spontaneous four-wave mixing (SFWM) process to generate biphotons from a hot atomic …

Nonclassical multi-photon and number states are attractive because of their wide
applicability, and experimental generation of these states is a longstanding aim. We prepare …