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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Efficient entanglement generation between exciton-polaritons using shortcuts to adiabaticity
Optics Letters
|July 14, 2018
Summary
Shortcuts to adiabaticity efficiently generate entanglement between exciton-polaritons in semiconductor microcavities. This method surpasses previous techniques by utilizing time-dependent nonlinearity for enhanced quantum dynamics.
Area of Science:
- Quantum optics
- Condensed matter physics
- Nonlinear dynamics
Background:
- Exciton-polaritons are quasiparticles formed from the coupling of excitons and photons in semiconductor microcavities.
- Generating entanglement between these quasiparticles is crucial for quantum information processing.
- Adiabatic quantum dynamics is a standard method for controlling quantum systems, but can be slow.
Purpose of the Study:
- To develop an efficient method for generating entanglement between exciton-polaritons.
- To improve upon existing methods for enhancing nonlinearity in coupled microcavity systems.
- To explore the application of shortcuts to adiabaticity in quantum optics.
Main Methods:
- Utilizing shortcuts to adiabaticity to accelerate quantum dynamics.
- Implementing a time-dependent nonlinearity in coupled semiconductor microcavities.
- Comparing the entanglement generation efficiency with a conventional method using constant nonlinearity.
Main Results:
- Achieved efficient generation of entanglement between exciton-polaritons.
- Demonstrated substantial improvement over a recently proposed method.
- Showcased the advantage of time-dependent nonlinearity exceeding Josephson coupling.
Conclusions:
- Shortcuts to adiabaticity provide an efficient route for exciton-polariton entanglement.
- Time-dependent nonlinearity offers superior control compared to constant nonlinearity.
- The proposed method has potential applications in other areas of nonlinear optics.
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