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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Entangling single photons from independently tuned semiconductor nanoemitters
Kaoru Sanaka1, Alexander Pawlis, Thaddeus D Ladd
1E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, United States. sanaka@stanford.edu
Nano Letters
|July 31, 2012
Summary
Researchers tuned nanoscale semiconductor devices to create matched emissions for quantum communication. This breakthrough enables entanglement of single photons from remote sources, a key step for quantum networks.
Area of Science:
- Quantum communication
- Solid-state quantum networks
- Nanoscale semiconductor devices
Background:
- Quantum communication systems face challenges due to device-to-device inhomogeneities.
- Precise control over nanoscale quantum emitters is crucial for reliable quantum information processing.
Purpose of the Study:
- To overcome device inhomogeneities in nanoscale quantum communication systems.
- To demonstrate entanglement of single photons from spatially separated quantum emitters.
Main Methods:
- Utilized ZnMgSe/ZnSe quantum-well nanostructures.
- Employed local laser-based heating to tune single impurity-bound exciton emitters.
- Achieved matched emission and photon bunching for quantum interference.
Main Results:
- Successfully tuned emission from two separate nanostructure devices to match.
- Enabled quantum interference and postselection of polarization-entangled single photons.
- Demonstrated entanglement of single photons from nanometer-sized sources separated by macroscopic distances.
Conclusions:
- Local laser heating is an effective method to correct for inhomogeneities in quantum devices.
- This technique is a critical advancement for realizing solid-state quantum optical networks.
- Paves the way for measurement-based entanglement generation between remote electron spins.
