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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Remote quantum entanglement between two micromechanical oscillators
Ralf Riedinger1, Andreas Wallucks2, Igor Marinković2
1Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna, Vienna, Austria.
Nature
|April 27, 2018
Summary
Researchers demonstrate entanglement between two micro-mechanical oscillators on separate chips using a silicon photonics platform. This breakthrough enables quantum state distribution at telecommunication wavelengths, advancing quantum networks.
Area of Science:
- Quantum physics and engineering
- Solid-state quantum systems
- Quantum information science
Background:
- Entanglement is a key quantum resource for quantum networks, enabling correlations between distant systems.
- Previous entanglement distribution methods used atomic vapors, individual atoms/ions, or solid-state defects.
- Practical quantum networks require specific operating wavelengths, high bandwidth, and long memory lifetimes.
Purpose of the Study:
- To introduce a novel micromachined solid-state platform for entanglement distribution.
- To demonstrate entanglement between chip-based optomechanical resonators.
- To enable integration with existing fiber-optic quantum networks.
Main Methods:
- Utilized a purely micromachined solid-state platform with nanostructured silicon beams.
- Created chip-based optomechanical resonators.
- Distributed entangled quantum states using an optical field near 1,550 nm.
Main Results:
- Successfully created and demonstrated entanglement between two micromechanical oscillators.
- The entangled oscillators were located on two separate chips, 20 cm apart.
- Entanglement distribution occurred at a wavelength compatible with standard fiber-optic telecommunication bands.
Conclusions:
- The developed silicon-based optomechanical resonator system is a viable platform for quantum networks.
- This technology facilitates direct incorporation into realistic fiber-optic quantum networks.
- Represents a significant advancement towards large-area quantum networks based on silicon photonics.
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