Polariton Simulators

Lead Research Organisation: University of Southampton
Department Name: School of Physics and Astronomy

Abstract

Microcavity polaritons are hybrid quasi-particles arising from strong coupling of cavity photons and quantum well excitons in the strong coupling regime. Due to their low effective mass and their specially shaped non-parabolic energy-momentum dispersion, microcavity polaritons are a promising platform to exhibit macroscopic quantum phenomena as long-range phase coherence and superfluidity. In this project, multiple optically imprinted and interacting polariton condensates are arranged in designated geometries. Such structures are denoted polariton graphs, and offer a platform to simulate physical spin models and many computationally intractable problems. On this basis, the polariton graph is mapped on a classical spin system, in which the phase of each polariton condensate is represented as a two-dimensional classical spin. Efficient tailoring of interactions in polariton graphs is crucial for mapping these systems on analogue spin systems or computational problems.

Publications

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Töpfer J (2020) Time-delay polaritonics in Communications Physics

Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/R512187/1 30/09/2017 29/09/2021
1982939 Studentship EP/R512187/1 18/12/2017 16/06/2021 Julian Toepfer
 
Description Design and realisation of an experimental setup for shaping of laser beams using spatial light modulators as a tool for generating arbitrary networks of coupled polariton condensates.Further, a theoretical and experimental investigation of the coupling of spatially separated and ballistically expanding condensates of exciton-polaritons in micorcavities has been conducted. Dynamical similarities between the investigated microscopic polariton system and macroscopic systems including time-delayed coupling has been found.
Exploitation Route Networks of coupled and interacting elements arise in many different areas in nature and technology. Non-linearites and finite speed of signal propagation make analysis and prediction of these systems computationally difficult. Analogue systems, such as time-delayed coupled polariton condensates that can experimentally be generated and modfied, might offer a tool to simulate more complex systems.
Sectors Other

URL https://doi.org/10.1038/s42005-019-0271-0