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Updated: Jun 6, 2025
00:07
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Entanglement and classical nonseparability convertible from orthogonal polarizations
Optics Express
|November 22, 2024
Summary
Macroscopic optical nonclassicality can be converted into entanglement and classical nonseparability using a beam splitter. This method, utilizing polarization, generates an equivalent Bell state from superpositions of coherent and displaced Fock states.
Area of Science:
- Quantum Optics
- Quantum Information Theory
Background:
- Nonclassical states of light are crucial for quantum information processing.
- Converting nonclassicality into entanglement is a key challenge in quantum optics.
Purpose of the Study:
- To propose a method for converting optical nonclassicality into entanglement and classical nonseparability.
- To explore the generation of entanglement from single-mode optical superposition states.
Main Methods:
- Utilizing the polarization degree of freedom in a bipartite Hilbert space.
- Mixing macroscopic single-mode optical superposition states with vacuum on a beam splitter.
- Characterizing nonclassicality using Wigner distributions and proposing experimental generation and measurement via homodyne tomography.
Main Results:
- A method is proposed to convert orthogonal polarizations into simultaneous entanglement and classical nonseparability.
- Superpositions of coherent and displaced Fock states are used to achieve this conversion.
- An equivalent Bell state emerges, with the entanglement-nonseparability proportion controlled by displacement amplitudes.
Conclusions:
- The proposed method offers a pathway to generate entanglement from nonclassical optical states.
- The interplay between entanglement and classical nonseparability is tunable via displacement amplitudes.
- Experimental generation and characterization of these states are feasible using established techniques.
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