Order-disorder oscillations in exciton-polariton superfluids

TL;DR

This paper investigates the complex dynamics of exciton-polariton superfluids, revealing oscillations between ordered and disordered states, and discovering a supersolid-like phase with coexisting superflow and crystalline order.

Contribution

It introduces a mean-field theoretical analysis of order-disorder oscillations and supersolid-like states in exciton-polariton superfluids under resonant pumping.

Findings

Modulational instability leads to alternating crystalline and disordered states.

A supersolid-like phase with coexisting superflow and crystalline order is identified.

Oscillatory behavior between different ordered states is observed.

Abstract

The dynamics of an exciton-polariton superfluid resonantly pumped in a semiconductor microcavity are investigated by mean-field theory. Modulational instability develops into crystalline order and then ordered and disordered states alternately form. A supersolid-like state is also found, in which superflow coexists with crystalline order at rest.