Related Experiment Video
Updated: Feb 14, 2026

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
Published on: April 4, 2017
High fidelity heralded single-photon source using cavity quantum electrodynamics
Xin Zhang1, Chang Xu2, Zhongzhou Ren3,4
1Department of Physics, Nanjing University, Nanjing, 210008, China.
Abstract:
Demands for single-photon sources are ubiquitous in quantum information processing as well as in quantum metrology. In many protocols for producing single photons, a cavity-emitter configuration is used. In such cavity quantum electrodynamical systems, the cavity can enforce a well-defined output mode for the photon and enhance its collection efficiency, while the emitter is indispensable for single photon emission. Here we show the two cavity-one two-level emitter configuration can be used to produce exclusively photon pairs, with each photon in a separate mode. Conditioning on detecting a photon in one of the modes, one heralds with high fidelity a single photon in the other mode. Counterintuitively, upon decreasing the coupling of the emitter to one of the modes, the heralding fidelity can further increase.
Related Concept Videos
Quantum Numbers
The Quantum-Mechanical Model of an Atom
Oral Cavity
Teeth: The teeth are the hardest structures in our bodies. Humans have two sets of teeth throughout their lifetime: deciduous (baby) teeth and permanent teeth. Each tooth consists of several parts: the crown (visible part), the root (embedded in the jaw), enamel (hard outer...
2D NMR: Heteronuclear Single-Quantum Correlation Spectroscopy (HSQC)
Nose and Nasal Cavity
Standing Waves in a Cavity

