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Updated: Jun 14, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Coherent scattering of a multiphoton quantum superposition by a mirror BEC
Francesco De Martini1, Fabio Sciarrino, Chiara Vitelli
1Dipartimento di Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, I-00185 Roma, Italy.
Physical Review Letters
|April 7, 2010
Summary
This experiment proposes creating a macroscopic quantum superposition by entangling a single photon with a Bose-Einstein condensate (BEC). This demonstrates quantum entanglement across spacelike separated locations.
Area of Science:
- Quantum Physics
- Quantum Optics
- Condense Matter Physics
Background:
- Quantum superposition is a fundamental principle where particles exist in multiple states simultaneously.
- Bose-Einstein condensates (BECs) are macroscopic quantum states of matter.
- Entanglement links the properties of quantum particles, regardless of distance.
Purpose of the Study:
- To propose an experiment demonstrating macroscopic quantum superposition.
- To entangle a microscopic single-photon state with a macroscopic BEC.
- To investigate quantum entanglement across spacelike separated regions.
Main Methods:
- Generating multiphoton quantum superposition using a quantum-injected optical parametric amplifier.
- Seeding the amplifier with a single photon from an Einstein-Podolsky-Rosen entangled pair.
- Interacting the multiphoton state with a mirror-Bose-Einstein condensate (BEC) structured as a Bragg interference.
Main Results:
- The proposed experiment is expected to realize a macroscopic quantum superposition.
- It will involve a single-photon state entangled with the BEC's momentum.
- This entanglement will occur across spacelike separated locations.
Conclusions:
- The experiment offers a novel method for creating and observing macroscopic quantum phenomena.
- It provides a pathway to explore fundamental aspects of quantum mechanics and entanglement.
- This research could have implications for quantum information processing and fundamental physics.
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