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Interference: Path Lengths

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Related Experiment Video

Updated: Aug 14, 2025

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

Experimental Hong-Ou-Mandel interference using two independent heralded single-photon sources.

Meng Ye¹, Yong Wang², Peng Gao²

¹CSG Power Generation Company Information Communication Branch, Guangzhou, 510070, China. germination@126.com.

Frontiers of Optoelectronics

|January 13, 2023

Summary

Researchers achieved Hong-Ou-Mandel (HOM) interference with 38.1% visibility using two heralded single-photon sources (HSPSs). This demonstrates a key technology for quantum cryptography and communication protocols like measurement device independent quantum key distribution (MDI QKD).

Keywords:

Hong—Ou—Mandel (HOM)quantum cryptography quantum key distribution (QKD)

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Last Updated: Aug 14, 2025

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Area of Science:

Quantum Optics
Quantum Information Science
Quantum Cryptography

Background:

Hong-Ou-Mandel (HOM) interference is a fundamental quantum optical phenomenon.
It is crucial for advancing quantum cryptography and communication, particularly measurement device independent quantum key distribution (MDI QKD).

Purpose of the Study:

To experimentally realize Hong-Ou-Mandel interference using two independent heralded single-photon sources (HSPSs).
To demonstrate the feasibility of HSPSs for core quantum communication protocols.

Main Methods:

Utilized two independent heralded single-photon sources (HSPSs).
Performed experiments to observe and quantify Hong-Ou-Mandel interference between the photons from the two HSPSs.

Main Results:

Successfully achieved Hong-Ou-Mandel interference with a visibility of approximately 38.1%.
Demonstrated the interference between two independent HSPSs, a critical step for advanced quantum protocols.

Conclusions:

The experimental realization of HOM interference with independent HSPSs is a significant advancement.
This technique is vital for developing long-distance MDI QKD, quantum coin-tossing, and other quantum cryptography protocols.