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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Engineering protected cavity-QED interactions through pulsed dynamical decoupling.

I Arrazola1,2, P Bertet3, Y Chu4

  • 1EHU Quantum Center and Department of Physics, University of the Basque Country UPV/EHU, Bilbao, Spain.

NPJ Quantum Information
|January 1, 2026
PubMed
Summary
This summary is machine-generated.

We developed pulsed dynamical decoupling strategies to overcome noise in cavity quantum electrodynamics (QED) systems. This method enhances excitation exchange and boosts system cooperativity for improved quantum operations.

Keywords:
Quantum informationQuantum optics

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Area of Science:

  • Quantum optics
  • Quantum information science
  • Solid-state physics

Background:

  • Cavity quantum electrodynamics (QED) systems are crucial for quantum technologies.
  • Low-frequency noise significantly degrades coupling between two-level systems and bosonic modes in cavity QED.
  • Overcoming noise is essential for robust quantum information processing.

Purpose of the Study:

  • To develop strategies for mitigating low-frequency noise in cavity QED setups.
  • To enable coherent excitation exchange despite degraded coupling.
  • To engineer specific quantum couplings and interactions within the system.

Main Methods:

  • Utilizing pulsed dynamical decoupling strategies.
  • Designing specific pulse sequences for noise suppression.
  • Analyzing residual imperfections and their impact on system performance.

Main Results:

  • Identified pulsed dynamical decoupling sequences effective against low-frequency noise.
  • Demonstrated the ability to realize Jaynes-Cummings, anti-Jaynes-Cummings, and Rabi couplings.
  • Showcased the potential to engineer diverse cavity-mediated interactions.
  • Achieved a significant boost in effective cooperativity (several orders of magnitude).
  • Improved the fidelity of quantum-technologically relevant operations.

Conclusions:

  • Pulsed dynamical decoupling is a viable strategy to combat noise in cavity QED.
  • This approach enhances system performance and opens avenues for advanced quantum control.
  • The developed methods can significantly improve the practical implementation of quantum technologies based on cavity QED.