Interfaced single-photon sources and quantum memories for photons together form a
foundational component of quantum technology. Achieving compatibility between …

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 …

Spontaneous parametric down-conversion (SPDC) in a nonlinear crystal has been a
workhorse for the generation of entangled and correlated single-photon pairs used for …

Biphotons, generated from a hot atomic vapor via the process of spontaneous four-wave
mixing (SFWM), have the following merits: Stable and tunable frequencies as well as …

We report the generation of biphotons, with a temporal full width at the half maximum
(FWHM) of 13.4±0.3 µs and a spectral FWHM of 50±1 kHz, via the process of spontaneous …

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 …

Entanglement-based quantum networks require quantum photonic interfaces between
stationary quantum memories and photons, enabling entanglement distribution. Here we …

This review article focuses on biphoton sources based on the double‐Λ Λ spontaneous four‐
wave mixing (SFWM) process in laser‐cooled as well as room‐temperature or hot atomic …

A single-photon source with narrow bandwidth, high purity, and large brightness can
efficiently interact with material qubits strongly coupled to an optical microcavity for quantum …

Nonclassical photon sources of high brightness are key components of quantum
communication technologies. We here demonstrate the generation of narrowband …