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Coherently opening a high-Q cavity.

Tommaso Tufarelli1, Alessandro Ferraro2, Alessio Serafini3

  • 1QOLS, Blackett Laboratory, Imperial College London, London SW7 2BW, United Kingdom.

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Summary
This summary is machine-generated.

We present a framework to release quantum states from high-Q resonators using a mediating mode. This method allows for controlled opening and closing of resonators, enabling quantum state transfer.

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Area of Science:

  • Quantum optics
  • Cavity quantum electrodynamics (Cavity QED)

Background:

  • High-Q resonators store quantum states but releasing them is challenging.
  • Controlled quantum state transfer is crucial for quantum information processing.

Purpose of the Study:

  • To develop a general framework for "opening" high-Q resonators.
  • To enable efficient release of quantum states as traveling waves.
  • To provide a method for "feeding" quantum fields into cavities.

Main Methods:

  • Utilizing a mediating mode for coherent scattering of resonator radiation.
  • Employing a one-dimensional continuum of modes (e.g., waveguide) for state release.
  • Analyzing a figure of merit to quantify information retention.

Main Results:

  • Identified an optimal traveling mode for retaining quantum information.
  • Developed an analytical study of a figure of merit based on system parameters.
  • Proposed feasible implementations using ensembles of two-level atoms.
  • Discussed integration with traditional cavity QED using three-level atoms.

Conclusions:

  • The proposed framework offers effective control over resonator "openness".
  • The mediating mode enables efficient quantum state transfer and preparation.
  • The approach is versatile, applicable to different atomic configurations.