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Related Experiment Video

Updated: Oct 25, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

A squeezed quantum microcomb on a chip.

Zijiao Yang^1,2, Mandana Jahanbozorgi¹, Dongin Jeong³

¹Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, VA, USA.

Nature Communications

|August 7, 2021

Summary

This summary is machine-generated.

Researchers demonstrate a deterministic quantum microcomb, generating 40 continuous-variable quantum modes for scalable quantum information processing. This breakthrough in quantum microcombs opens new avenues in spectroscopy and quantum networking.

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Area of Science:

Quantum optics and photonics
Integrated photonics
Quantum information science

Background:

Optical microresonator-based frequency combs (microcombs) are established platforms for nonlinear physics, metrology, and spectroscopy.
The deterministic quantum regime of microcombs, enabling unconditional entanglement of frequency modes, remains largely unexplored.
Such entangled modes are crucial for scalable universal quantum computing and quantum networking.

Purpose of the Study:

To demonstrate a deterministic quantum microcomb in a practical, chip-based platform.
To generate and characterize multi-mode entangled states for quantum information processing.
To explore the potential of integrated quantum microcombs for advanced applications.

Main Methods:

Fabrication of a silica microresonator on a silicon chip.
Generation of a microcomb in the deterministic quantum regime.
Characterization of 40 continuous-variable quantum modes (20 two-mode squeezed pairs) using high-resolution spectroscopy.

Main Results:

Successful demonstration of a deterministic quantum microcomb on an integrated photonic chip.
Observation of 40 continuous-variable quantum modes within a 1 THz optical span at telecommunication wavelengths.
Attainment of a maximum raw squeezing of 1.6 dB and characterization of frequency equidistance.

Conclusions:

The study presents a significant step towards scalable, chip-based quantum information processing using microcombs.
Deterministic generation of frequency-multiplexed quantum states in integrated photonics is now feasible.
This work paves the way for new applications in spectroscopy, quantum metrology, and continuous-variable quantum computing.