Next nearest neighbour coupling with spinor polariton condensates

TL;DR

This paper demonstrates experimental control over next-nearest-neighbour coupling in spinor polariton condensates, enabling the engineering of complex many-body Hamiltonians in semiconductor microcavities.

Contribution

It introduces all-optical control of coupling strength via pseudospin screening, overcoming traditional spatial coupling hierarchies in exciton-polariton systems.

Findings

Successful observation of next-nearest-neighbour coupling.

All-optical tuning of coupling strength.

Potential for creating complex many-body Hamiltonians.

Abstract

We report on experimental observation of next-nearest-neighbour coupling between ballistically expanding spinor exciton-polariton condensates in a planar semiconductor microcavity. All-optical control over the coupling strength between neighbouring condensates is demonstrated through distance-periodic pseudospin screening of their ballistic particle outflow due to the inherent splitting of the planar cavity transverse-electric (TE) and transverse-magnetic (TM) modes. By screening the nearest-neighbour coupling we overcome the conventional spatial coupling hierarchy between condensates. This offers a promising route towards creating unconventional non-planar many-body Hamiltonians using networks of ballistically expanding spinor exciton-polariton condensates.