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Related Experiment Video

Updated: Apr 25, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

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Spectral multiplexing for scalable quantum photonics using an atomic frequency comb quantum memory and feed-forward

Neil Sinclair1, Erhan Saglamyurek1, Hassan Mallahzadeh1

  • 1Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2 N 1N4, Canada.

Physical Review Letters
|August 16, 2014
PubMed
Summary

Researchers developed a quantum memory for quantum information science, enabling flexible mapping of many photon states. This breakthrough uses spectrally multiplexed states for advanced quantum repeater applications.

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Last Updated: Apr 25, 2026

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Quantum communication

Background:

  • Future quantum technologies require quantum memories capable of storing numerous photon states simultaneously.
  • Controlling the mapping between input and output modes during storage is crucial for applications like quantum repeaters.

Purpose of the Study:

  • To demonstrate a method for controlling the mapping between spectral modes in a quantum memory.
  • To enable flexible routing of quantum information for advanced quantum repeater protocols.

Main Methods:

  • Utilizing spectrally multiplexed states and quantum memories with fixed storage times.
  • Employing a Ti:Tm:LiNbO_{3} waveguide cooled to 3 K.
  • Implementing a phase modulator and spectral filter for feed-forward-controlled frequency manipulation.

Main Results:

  • Successfully demonstrated storage and frequency manipulation of time-bin qubits.
  • Encoded qubits into up to 26 multiplexed spectral modes.
  • Achieved a high storage fidelity of 97%.

Conclusions:

  • The developed quantum memory system allows for precise control over spectral mode mapping, essential for quantum repeaters.
  • This work advances the development of scalable quantum networks and information processing.