Indistinguishable photons from separated silicon-vacancy centers in diamond

Area of Science:

• Quantum optics
• Solid-state physics
• Materials science

Background:

• Silicon-vacancy (SiV) centers are promising solid-state defects for quantum applications.
• Efficient generation of high-quality photons is essential for quantum information processing.

Purpose of the Study:

• To demonstrate the efficient generation of coherent optical photons using silicon-vacancy (SiV) centers in diamond.
• To investigate the spectral properties and indistinguishability of photons emitted by SiV centers.
• To assess the potential of SiV centers for quantum network applications.

Main Methods:

• Utilized silicon-vacancy (SiV) centers in diamond as photon emitters.
• Characterized the spectral properties of generated optical photons.
• Performed a Hong-Ou-Mandel interference experiment at 5 Kelvin to demonstrate photon indistinguishability from separated emitters.

Main Results:

• SiV centers efficiently generate coherent optical photons with excellent spectral properties.
• Photon indistinguishability was successfully demonstrated using separated SiV emitters in a Hong-Ou-Mandel interference experiment.
• The observed features are attributed to the inversion symmetry of SiV centers.

Conclusions:

• Silicon-vacancy centers in diamond are highly effective for generating high-quality, indistinguishable single photons.
• The demonstrated capabilities position SiV centers as strong candidates for building efficient quantum network nodes.
• Further research can explore advanced quantum network functionalities utilizing SiV-based emitters.