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Optomechanical Quantum Entanglement Mediated by Acoustic Phonon Fields
1Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755, USA.
Physical Review Letters
|December 3, 2022
Summary
We demonstrate how quantum entanglement can be generated between two separated inductor-capacitor (LC) oscillators. This occurs through optomechanical coupling to an acoustic environment, enabling distributed entanglement for superconducting qubits.
Area of Science:
- Quantum physics
- Optomechanics
- Superconducting circuits
Background:
- Inductor-capacitor (LC) oscillators are fundamental quantum systems.
- Optomechanical coupling enables interaction between mechanical and optical degrees of freedom.
- Generating distributed entanglement is crucial for quantum information processing.
Purpose of the Study:
- To investigate quantum time evolution of coupled LC oscillators.
- To explore entanglement generation via an acoustic environment.
- To establish a method for creating distributed entanglement between superconducting qubits.
Main Methods:
- Exact solutions for quantum time evolution.
- Optomechanical coupling to a quantum thermal acoustic field.
- Analysis of entanglement dynamics without resonant photon exchange.
Main Results:
- Causal entanglement dynamics observed between spatially separated LC oscillators.
- Significant entanglement generated irrespective of environment temperature.
- Demonstrated entanglement generation via a phonon bus bar.
Conclusions:
- Optomechanical coupling to an acoustic environment can induce entanglement.
- Distributed entanglement is achievable between superconducting qubits without resonant phonon exchange.
- This provides a novel pathway for scalable quantum networks.
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