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arXiv · 1704.04811

A driven-dissipative spin chain model based on exciton-polariton condensates

H. Sigurdsson·A. J. Ramsay·H. Ohadi·Y. G. Rubo·T. C. H. Liew·J. J. Baumberg·I. A. Shelykh
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Abstract

An infinite chain of driven-dissipative condensate spins with uniform nearest-neighbor coherent coupling is solved analytically and investigated numerically. Above a critical occupation threshold the condensates undergo spontaneous spin bifurcation (becoming magnetized) forming a binary chain of spin-up or spin-down states. Minimization of the bifurcation threshold determines the magnetic order as a function of the coupling strength. This allows control of multiple magnetic orders via adiabatic (slow ramping of) pumping. In addition to ferromagnetic and anti-ferromagnetic ordered states we show the formation of a paired-spin ordered state $\left|\dots \uparrow \uparrow \downarrow \downarrow \dots \right. \rangle$ as a consequence of the phase degree of freedom between condensates.

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H. Sigurdsson, A. J. Ramsay, H. Ohadi, Y. G. Rubo, T. C. H. Liew, J. J. Baumberg, I. A. Shelykh. 2017-04-16. A driven-dissipative spin chain model based on exciton-polariton condensates. https://doi.org/10.1103/physrevb.96.155403

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