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Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
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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.

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This summary is machine-generated.

Researchers demonstrate a two-cavity, one emitter system for generating exclusively photon pairs. Detecting a photon in one mode heralds a single photon in the other mode with high fidelity.

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Area of Science:

  • Quantum optics
  • Quantum information science

Background:

  • Single-photon sources are crucial for quantum information processing and metrology.
  • Cavity-emitter systems are commonly used for single-photon generation, enhancing collection efficiency and mode definition.

Purpose of the Study:

  • To investigate a two-cavity, one two-level emitter configuration for generating exclusively photon pairs.
  • To explore the heralding of single photons in separate modes using this configuration.

Main Methods:

  • Utilized a cavity quantum electrodynamical system with two cavities and a single two-level emitter.
  • Analyzed the generation of photon pairs and the conditional heralding of single photons.

Main Results:

  • Successfully produced exclusively photon pairs, each in a distinct mode.
  • Achieved high-fidelity heralding of a single photon in one mode by detecting a photon in the other mode.
  • Observed that decreasing emitter coupling to one cavity can unexpectedly increase heralding fidelity.

Conclusions:

  • The demonstrated two-cavity, one emitter system offers a novel method for generating heralded single photons.
  • This configuration provides precise control over photon pair generation and heralding efficiency.
  • The counterintuitive finding regarding emitter coupling suggests new avenues for optimizing single-photon source performance.