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Spatial Multiplexing of Squeezed Light by Coherence Diffusion.

Jian Sun1, Xichang Zhang1, Weizhi Qu1

  • 1Department of Physics, State Key Laboratory of Surface Physics and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Fudan University, Shanghai 200433, China.

Physical Review Letters
|December 7, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel method using atomic motion to spatially multiplex squeezed light, overcoming noise limitations. This breakthrough enables the creation of multiple squeezed light beams efficiently, paving the way for advanced quantum technologies.

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Area of Science:

  • Quantum optics
  • Atomic physics
  • Nonlinear optics

Background:

  • Spatially splitting nonclassical light beams is challenging due to noise.
  • Existing methods struggle with efficiency and scalability.

Purpose of the Study:

  • To propose a new platform for spatial multiplexing of squeezed light.
  • To overcome the limitations of traditional beam splitting for nonclassical light.

Main Methods:

  • Utilizing the thermal motion of atoms in an antirelaxation coated vapor cell.
  • Leveraging shared long-lived atomic coherence created by coherent atomic diffusion.
  • Employing nonlinear optical processes for light squeezing.

Main Results:

  • Demonstrated spatial multiplexing of squeezed light using low laser power (milliwatts).
  • Achieved transfer of squeezed light properties between distant optical channels.
  • Overcame noise contamination typically associated with beam splitting.

Conclusions:

  • The proposed atomic motion platform enables efficient generation of multiple squeezed light beams.
  • This approach is promising for multinode quantum networks and quantum-enhanced technologies like imaging and sensing.