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Topologically driven Rabi-oscillating interference dislocation.

Amir Rahmani1, David Colas2, Nina Voronova3,4

  • 1Department of Physics, Azarbaijan Shahid Madani University, Tabriz, Iran.

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|December 5, 2024
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Summary
This summary is machine-generated.

This study theoretically analyzes quantum vortex motion in microcavity exciton-polaritons. We reveal how interference dislocations form and propagate, carrying orbital angular momentum.

Keywords:
exciton-polaritoninterference dislocationlinear momentumorbital angular momentumself-interfering wavepacket

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Area of Science:

  • Quantum optics
  • Condensed matter physics
  • Light-matter interactions

Background:

  • Quantum vortices are quantized analogs of classical vortices, featuring phase singularities.
  • Their motion in coherently-coupled systems, like exciton-polaritons, remains an active research area.
  • Microcavity exciton-polaritons exhibit strong light-matter coupling and mass imbalance.

Purpose of the Study:

  • To theoretically investigate the propagation of interference dislocations in strongly coupled microcavity exciton-polaritons.
  • To understand the formation mechanisms and dynamics of phase singularities in such systems.
  • To analyze the resulting orbital angular momentum of the light-matter quasiparticles.

Main Methods:

  • Theoretical analysis of light propagation under strong coupling conditions.
  • Utilizing combinations of vortex and Gaussian beams with resonant pulsed pumping.
  • Employing Poincaré space analysis for pseudospin morphology of polariton states.

Main Results:

  • Demonstrated the origin of interference dislocations from self-interference fringes.
  • Linked dislocation formation to non-parabolic polariton dispersion and Rabi-oscillating vortices.
  • Showcased that the resulting beam carries orbital angular momentum with decaying oscillations.

Conclusions:

  • The study provides a theoretical framework for understanding quantum vortex dynamics in exciton-polariton systems.
  • Interference dislocations can be generated and controlled in strongly coupled light-matter systems.
  • The findings contribute to the exploration of phase singularities and orbital angular momentum in novel quantum states.