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This study proposes a new model for quantum entanglement using a coherence approach and linear optics. The findings demonstrate that Hong-Ou-Mandel effects can be achieved with coherent photons, challenging classical assumptions.

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Area of Science:

  • Quantum Optics
  • Quantum Information Science

Background:

  • Classical physics and Poisson statistics do not consider coherent photons as quantum particles due to bunching.
  • A coherence approach has recently been used to explain quantum correlations like the Hong-Ou-Mandel (HOM) effect.
  • The HOM effect is understood as arising from a fixed sum-phase relation between paired photons.

Purpose of the Study:

  • To propose and analyze a coherently excited Hong-Ou-Mandel (HOM) model.
  • To investigate the fundamental physics of two-photon correlation using linear optics.
  • To explore polarization-basis control for quantum correlation phenomena.

Main Methods:

  • Development of a coherently excited HOM model.
  • Utilizing linear optics-based polarization-basis control.
  • Employing a Mach-Zehnder interferometer with synchronized acousto-optic modulators for polarization-frequency correlation.
  • Implementing selective measurement of heterodyne signals for polarization-basis control.

Main Results:

  • The coherent analysis successfully replicates the HOM effects for paired coherent photons on a beam splitter.
  • Demonstrated that quantum correlation can be understood as a result of selective measurements between product bases of phase-coherent photons.
  • Observed uniform individual output intensities despite the HOM effects.

Conclusions:

  • A coherently excited HOM model provides a new perspective on quantum entanglement and correlation.
  • The study validates the coherence approach in explaining quantum phenomena traditionally requiring quantum operators.
  • Linear optics and selective measurements offer a pathway to control and observe quantum correlations.