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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Interference from a nonlocal double-slit through one-photon process.

Shu Gan1, Su-Heng Zhang, Jun Xiong

  • 1Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China.

Optics Express
|January 7, 2010
PubMed
Summary
This summary is machine-generated.

This study demonstrates nonlocal double-slit interference using spatially incoherent thermal light. The interference fringes arise from the first-order spatial correlation of the incoherent light field, observed through intensity measurements.

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Area of Science:

  • Quantum optics
  • Wave-particle duality
  • Classical optics

Background:

  • Double-slit experiments typically demonstrate wave interference using coherent light.
  • Spatially incoherent light sources were previously thought to be unsuitable for observing interference patterns.
  • Understanding interference with incoherent light is crucial for fundamental physics and optical technologies.

Purpose of the Study:

  • To experimentally demonstrate nonlocal double-slit interference with a spatially incoherent light source.
  • To theoretically analyze the interference pattern formation using incoherent light.
  • To attribute the observed interference to specific properties of the incoherent light field.

Main Methods:

  • Illuminating two spatially separated apertures with a spatially incoherent light source.
  • Superposing the light from the two apertures to form a double-slit.
  • Performing intensity measurements of the resulting pattern.
  • Theoretical analysis using first-order spatial interference concepts.

Main Results:

  • A well-defined interference fringe pattern was observed solely through intensity measurements.
  • The experimental results align with theoretical predictions based on first-order spatial interference.
  • The interference pattern is attributed to the spatial correlation properties of the incoherent light field.

Conclusions:

  • Nonlocal double-slit interference can be achieved with spatially incoherent thermal light.
  • The phenomenon is explained by the first-order spatial correlation of the incoherent light field.
  • This finding has implications for understanding the nature of light and coherence.