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Updated: Aug 23, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Quantum arbitrary waveform generator
Kan Takase1,2, Akito Kawasaki1, Byung Kyu Jeong1
1Department of Applied Physics, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
Researchers developed a quantum arbitrary waveform generator (Q-AWG) capable of producing complex quantum light waveforms at high speeds. This breakthrough enables novel quantum technologies, including practical optical quantum computing.
Area of Science:
- Quantum optics
- Quantum electronics
- Photonics
Background:
- Controlling light's temporal waveform is crucial for versatile light sources in classical and quantum applications.
- Classical pulse shaping is mature, but generating arbitrary quantum light waveforms requires a new approach due to the fragility of quantum states.
Purpose of the Study:
- To invent and demonstrate a quantum arbitrary waveform generator (Q-AWG) capable of producing arbitrary quantum light waveforms.
- To enable advanced quantum technologies by overcoming limitations of classical pulse shaping.
Main Methods:
- Developed a novel architecture for a Q-AWG.
- Demonstrated the core technology by generating highly nonclassical states of light.
- Achieved semi-deterministic operation at gigahertz repetition rates.
Main Results:
- Successfully generated quantum light states with unprecedented temporal waveforms.
- The proposed Q-AWG architecture operates at high repetition rates (over gigahertz).
- Demonstrated the generation of highly nonclassical states of light.
Conclusions:
- The developed Q-AWG architecture represents a significant advancement in quantum light control.
- This technology paves the way for powerful quantum technologies, including practical optical quantum computing.
- The Q-AWG's ability to generate arbitrary quantum waveforms opens new avenues in quantum information science.
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