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Updated: May 3, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Dynamical Casimir emission from polariton condensates.
Selma Koghee1, Michiel Wouters1
1TQC, Universiteit Antwerpen, Universiteitsplein 1, B-2610 Wilrijk, Belgium.
Physical Review Letters
|February 4, 2014
Summary
We theoretically investigated the dynamical Casimir effect in exciton-polariton condensates. Bogoliubov excitations arise from quantum vacuum changes, impacting condensate depletion and spatial coherence.
Area of Science:
- Quantum optics
- Condensed matter physics
- Non-equilibrium dynamics
Background:
- Exciton-polariton condensates exhibit unique quantum phenomena.
- The dynamical Casimir effect involves particle creation from vacuum fluctuations.
- Sudden changes in quantum systems can generate excitations.
Purpose of the Study:
- To theoretically investigate the dynamical Casimir effect in exciton-polariton condensates.
- To analyze the generation and evolution of Bogoliubov excitations.
- To study the impact on momentum distribution, spatial coherence, and condensate depletion.
Main Methods:
- Theoretical modeling of exciton-polariton condensates.
- Application of the linearized truncated Wigner approximation.
- Analysis of Bogoliubov excitation dynamics under interactions and losses.
Main Results:
- Bogoliubov excitations are generated due to abrupt quantum vacuum changes.
- Analytical determination of momentum distribution at large and small momenta.
- A scaling relation for condensate depletion and linear dependence of correlation length on depletion were found.
Conclusions:
- The study provides insights into non-equilibrium quantum dynamics in exciton-polariton condensates.
- Understanding these dynamics is crucial for controlling quantum states and phenomena.
- The findings offer a framework for future experimental investigations.
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