Spin-Meissner effect in systems of coupled polariton condensates

TL;DR

This paper explores how the interplay of Zeeman splitting and TE-TM spin-flip tunneling affects the spin-Meissner effect in coupled polariton condensates, revealing geometry-dependent behaviors and potential for spin-controlled photonic devices.

Contribution

It introduces a theoretical analysis of spin-Meissner effect modifications due to inter-site tunneling and system geometry in polariton condensate systems.

Findings

In a dyad, the chemical potential scales quadratically with magnetic field.

In a triangle, a complex phase diagram with asymmetric polarization states emerges.

In a square, symmetry can restore the spin-Meissner effect, making emission frequency field-independent.

Abstract

We theoretically investigate the interplay between Zeeman splitting and TE-TM-induced spin-flip tunneling in coupled exciton-polariton condensates systems and its impact on the spin-Meissner effect. We demonstrate that although a single condensate exhibits the effect of full paramagnetic screening via spin-anisotropic interactions, the inter-site spin-flip tunneling can dramatically alter this behavior. The geometry of the system is shown to play a crucial role. In particular, in a dyad, the chemical potential reveals quadratic scaling with the magnetic field. In a triangle, the competition between Zeeman and TE-TM splittings produces a rich phase diagram that features asymmetric polarization states corresponding to both positive and negative magnetic susceptibility. In a square configuration, the symmetry of the network can restore the spin-Meissner effect, so that the condensate emission frequency becomes magnetic field independent in an extended parameter range. These findings not only shed light on the fundamental physics of polariton lattices but also suggest promising avenues for engineering robust spin-controlled photonic devices and polaritonic simulators.