Persistent polarization oscillations in ring-shape polariton condensates

TL;DR

This paper predicts a novel limit cycle behavior with polarization oscillations in ring-shaped polariton condensates, arising from the interplay of orbital motion and spin degrees of freedom, enabling potential qubit control.

Contribution

It introduces the concept of polarization oscillations in spinor polariton condensates confined in a rotating trap, a phenomenon absent in scalar condensates.

Findings

Polarization oscillations occur on tens of picoseconds timescale.

The effect is specific to spinor (polarized) condensates, not scalar.

Potential application in initializing and controlling polariton-based qubits.

Abstract

We predict the limit cycle solution for a ring-shape bosonic condensate of exciton-polaritons confined in an optically induced rotating trap. The limit cycle manifests itself with polarization oscillations on a characteristic timescale of tens of picoseconds. The effect arises due to the interplay between orbital motion and the polarization degree of freedom. It is specific to spinor bosonic condensates and would be absent in a scalar case, where a bi-stability of stationary solutions would be observed instead. This work offers a tool of initialisation and control of qubits based on superpositions of polariton condensates characterised by different topologic charges.