Dynamics of coherent polaritons in double-well systems

TL;DR

This paper explores the behavior of coherent polaritons in double-well systems under resonant pumping, revealing bistability, self-pulsing, and a transition from Josephson oscillations to self-trapping, with validation of theoretical models against numerical solutions.

Contribution

It provides a comprehensive analysis of polariton dynamics in double-well systems, including new insights into bistability, self-pulsing, and the crossover between oscillation regimes, validated by comparing models and simulations.

Findings

Identification of bistability and self-pulsing regimes.

Prediction of a crossover from Josephson oscillations to self-trapping.

Validation of the two-mode model against full Gross-Pitaevskii simulations.

Abstract

We investigate the physics of coherent polaritons in a double-well configuration under a resonant pumping. For a continuous wave pump, bistability and self-pulsing regimes are identified as a function of the pump energy and intensity. The response to an additional probe pulse is characterized in the different cases and related to the Bogoliubov modes around the stationary state. Under a pulsed pump, a crossover from Josephson-like oscillations to self-trapping is predicted for increasing pump intensity. The accurateness of the effective two-mode model is assessed by comparing its predictions to a full solution of the non-equilibrium Gross-Pitaevskii equation.