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Efficiently loading a single photon into a single-sided Fabry-Perot cavity.

Chang Liu1, Yuan Sun1, Luwei Zhao1

  • 1Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.

Physical Review Letters
|October 11, 2014
PubMed
Summary
This summary is machine-generated.

We efficiently loaded single photons into a cavity using an optimized temporal waveform. This technique achieves high loading efficiency, paving the way for advanced quantum networks.

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Area of Science:

  • Quantum Optics
  • Quantum Information Science
  • Cavity Quantum Electrodynamics

Background:

  • Efficiently coupling single photons to optical cavities is crucial for quantum information processing.
  • Existing methods face challenges in achieving high fidelity photon loading.

Purpose of the Study:

  • To demonstrate high-efficiency single photon loading into an optical cavity.
  • To explore the use of tailored photon waveforms for improved cavity coupling.
  • To investigate applications in quantum network development.

Main Methods:

  • Utilizing heralded narrow-band single photons with an electro-optical amplitude modulator to shape the temporal waveform.
  • Matching the photon wave packet's time constant to the cavity's photon lifetime.
  • Employing a single-sided Fabry-Perot cavity for free-space coupling.
  • Verifying time reversal between frequency-entangled photon pairs.

Main Results:

  • Achieved a single photon loading efficiency of (87±2)% from free space into the cavity using shaped wave packets.
  • Demonstrated direct loading of heralded single Stokes photons with (60±5)% efficiency without waveform shaping.
  • Verified the time-reversal symmetry of the entangled photon pairs.

Conclusions:

  • An optimal temporal waveform enables efficient single photon loading into cavities.
  • The demonstrated approach offers a promising pathway for scalable quantum network architectures.
  • Cavity quantum electrodynamics principles are leveraged for enhanced quantum communication.