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Updated: May 13, 2026
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Mesoscopic entanglement induced by spontaneous emission in solid-state quantum optics
Alejandro González-Tudela1, Diego Porras
1Departamento de Física Teórica de la Materia Condensada, Universidad Autonoma de Madrid, 28040 Madrid, Spain.
Physical Review Letters
|March 12, 2013
Summary
Researchers engineered entangled states in solid-state quantum optics by controlling qubit positions in waveguides. This method utilizes collective spontaneous decay to create mesoscopic entanglement, bypassing dipole-dipole interactions.
Area of Science:
- Quantum optics
- Solid-state physics
- Quantum information science
Background:
- Solid-state quantum optics utilizes fixed qubits in one-dimensional waveguides.
- Controlling qubit interactions is crucial for quantum information processing.
Purpose of the Study:
- To engineer an entangled mesoscopic steady state using collective spontaneous decay.
- To demonstrate a method for controlling quantum states in solid-state systems.
Main Methods:
- Implementing qubits in photonic or plasmonic one-dimensional waveguides.
- Controlling qubit positions and applying coherent driving.
- Engineering collective spontaneous decay via destructive interference.
Main Results:
- Achieved an entangled mesoscopic steady state.
- Demonstrated cancellation of dipole-dipole interactions in one dimension.
- Realized pure superradiant Dicke models.
Conclusions:
- Qubit positioning and coherent driving are effective tools for generating entanglement.
- The proposed scheme offers a pathway to scalable quantum entanglement in solid-state systems.
- Suppression of dipole-dipole interactions is key to achieving desired quantum states.
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