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Updated: May 10, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Experimental bound entanglement through a Pauli channel.
Elias Amselem1, Muhammad Sadiq, Mohamed Bourennane
1Department of Physics, Stockholm University, Stockholm, Sweden. amselem@fysik.su.se
Scientific Reports
|June 12, 2013
Summary
Researchers explored how noise affects quantum systems using Pauli channels and entangled photons. They generated bound entangled states, demonstrating violations of the CHSH inequality while maintaining positive partial transpose properties.
Area of Science:
- Quantum Information Science
- Quantum Communication
- Quantum Error Correction
Background:
- Quantum technologies face significant challenges due to noise affecting quantum systems.
- Pauli channels are crucial lossless models for quantum communication and error analysis.
Purpose of the Study:
- To investigate the impact of Pauli channels on a four-qubit pure state.
- To experimentally simulate Pauli channels using polarization-encoded entangled photons.
- To explore the generation of bound entangled states under correlated noise conditions.
Main Methods:
- Experimental simulation of Pauli channels acting on entangled photons.
- Utilizing polarization encoding for quantum information.
- Characterizing quantum states and their entanglement properties.
Main Results:
- Generation of a set of four orthogonal bound entangled states when correlated noise acts on photons.
- Demonstration that products of Bell states can be transformed into a bound entangled regime.
- Identification of bound entangled states that violate the CHSH inequality and exhibit positive partial transpose.
Conclusions:
- Correlated noise in Pauli channels can lead to the creation of valuable bound entangled states.
- These states possess unique properties, violating Bell inequalities while maintaining non-separability.
- The findings contribute to understanding quantum information processing under realistic noisy conditions.
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