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Partial quantum revivals of localized condensates in distorted lattices
Optics Letters
|March 13, 2020
Summary
We discovered that bosons in a kagome lattice exhibit unique directional propagation with quantum jumps and revivals. This phenomenon, observed in exciton polaritons, is robust and offers potential for optical logic devices.
Area of Science:
- Quantum physics
- Condensed matter physics
- Photonics
Background:
- Exciton polaritons in kagome lattices exhibit unique quantum phenomena.
- Flat band systems allow for novel particle dynamics.
Purpose of the Study:
- To investigate the propagation dynamics of bosons in a nearly flat band under specific conditions.
- To explore the role of anisotropy in the behavior of localized condensates.
- To identify potential applications in optical logic.
Main Methods:
- Theoretical modeling of bosons loaded by a short Laguerre-Gaussian pulse.
- Analysis of exciton polaritons in a kagome lattice.
- Comparison between tight-binding and continuous models.
Main Results:
- Observed peculiar directional propagation of localized condensates.
- Demonstrated quantum jumps, collapses, and revivals of compact states.
- Found propagation persists regardless of anisotropy direction.
- Noted the phenomenon is more pronounced in a continuous model than a tight-binding model.
- Confirmed robustness of quantum revivals to interactions and finite particle lifetime.
Conclusions:
- Anisotropic flat band systems support unique, robust quantum dynamics.
- The observed phenomena in exciton polaritons offer a pathway for novel optical logic.
- The system provides an easily implementable platform for optical logic without magnetic fields or spin-orbit interaction.
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