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Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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Updated: Jun 23, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Scheme for proving the bosonic commutation relation using single-photon interference.

M S Kim1, H Jeong, A Zavatta

  • 1School of Mathematics and Physics, The Queen's University, Belfast BT7 INN, United Kingdom.

Physical Review Letters
|May 14, 2009
PubMed
Summary
This summary is machine-generated.

This study proposes an experiment to directly prove the commutation relation for bosonic operators using single-photon manipulation. The proposed method is feasible and could generate nonclassical states.

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Area of Science:

  • Quantum optics
  • Quantum information science

Background:

  • The commutation relation between bosonic annihilation and creation operators is fundamental to quantum mechanics.
  • Recent advances in single-photon manipulation enable new experimental approaches.

Purpose of the Study:

  • To propose a direct experimental proof of the bosonic commutation relation.
  • To explore the generation of highly nonclassical states of light.

Main Methods:

  • Devising a single-photon interferometer.
  • Implementing sequences of photon addition and subtraction operations.
  • Utilizing coherent superpositions and interference.

Main Results:

  • The proposed experiment can directly prove the commutation relation.
  • The experiment can produce highly nonclassical states.
  • Assessment of experimental imperfections indicates high feasibility.

Conclusions:

  • The proposed scheme offers a direct and feasible method for verifying a fundamental quantum mechanical principle.
  • The experimental setup has the potential to generate novel quantum states for further research.