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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Two-particle nonlocal Aharonov-Bohm effect from two single-particle emitters.
Janine Splettstoesser1, Michael Moskalets, Markus Büttiker
1Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland.
Physical Review Letters
|October 2, 2009
Summary
Researchers demonstrate controllable orbital entanglement of electrons in a quantum Hall circuit. This leads to observable two-particle correlations and violation of Bell inequality, crucial for quantum information science.
Area of Science:
- Condensed Matter Physics
- Quantum Information Science
Background:
- Quantum Hall effect provides a unique platform for studying electron correlations.
- Entanglement is a key resource for quantum computation and communication.
Purpose of the Study:
- To propose a mesoscopic circuit for generating and controlling orbitally entangled electrons.
- To investigate two-particle correlations and their manifestation in quantum transport phenomena.
Main Methods:
- Utilizing a mesoscopic circuit with two uncorrelated single-particle sources and two Mach-Zehnder interferometers.
- Applying magnetic fluxes to induce controlled entanglement.
- Analyzing Aharonov-Bohm effect in noise to detect correlations.
Main Results:
- Achieved controllable production of orbitally entangled electrons.
- Observed two-particle correlations due to path information erasure.
- Demonstrated Aharonov-Bohm effect in noise, while current remained insensitive to magnetic fluxes.
- Showcased violation of a Bell inequality at maximum concurrence within a specific time interval.
Conclusions:
- The proposed circuit enables controllable generation of electron orbital entanglement.
- Two-particle correlations, manifested as an Aharonov-Bohm effect in noise, confirm entanglement.
- Violation of Bell inequality validates the quantum nature of the observed correlations, with potential applications in quantum technologies.
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