Generation and Manipulation of Narrowband Photon Pairs: Single Photons under Control

Chen, Shengwang, Du

Shengwang Du

Hui Yan, ShiLiang ZHU, Kai-Yu Liao +1 more

Manipulation of the temporal waveform of single photons not only provides a powerful benchmark tool for fundamental research in quantum physics, but also plays a critical role in quantum information processing. The generation of narrowband paired photons makes it possible for manipulating the temporal waveform of single photons. At first, we reviewed the generation of narrowband photon pairs through four wave mixing and slow light with high optical depth cold atoms. Secondly, we reviewed the generation and manipulation of the heralded narrowband single photons with controllable waveforms. Thirdly, we reviewed the application of the heralded narrowband single photons: (1) single photon precursor; (2) the coherent interaction between the heralded narrowband single photon and two energy level atoms; (3) DPS quantum key distribution with the heralded narrowband single photons.

Shengwang Du

Shengwang Du

We review our recent progress in generating and manipulating narrowband (∼ MHz) entangled pahoton pairs from spontaneous four-wave mixing in atomic ensembles. These photons are ideal for interacting with atomic nodes in a photon-atom quantum network.

Per Jönsson