Driven-dissipative spin chain model based on exciton-polariton condensates

• Published in: Physical Review B
• Main Authors: Sigurdsson, H., Ramsay, A. J., Ohadi, H., Rubo, Y. G., Liew, T. C.H., Baumberg, J. J., Shelykh, I. A.
• Other Authors: University of St Andrews. School of Physics and Astronomy
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2018
• Subjects: QC Physics; TK Electrical engineering. Electronics Nuclear engineering; Electronic; Optical and Magnetic Materials; Condensed Matter Physics; NDAS; QC; TK; Moe; Iceland
• Online Access: http://hdl.handle.net/10023/12678; https://doi.org/10.1103/PhysRevB.96.155403

This work was supported by the Research Fund of the University of Iceland, The Icelandic Research Fund, Grant No. 163082-051, Grant No. EPSRC EP/L027151/1, Grant No. ERC LINASS 320503, the Mexican Conacyt Grant No. 251808, and the Singaporean MOE GrantsNo. 2015-T2-1-055 and No. 2016-T1-1-084. I.A.S. acknowledges support from a mega-grant No. 14.Y26.31.0015 and GOSZADANIE No.3.2614.2017/4.6 of the Ministry of Education and Science of Russian Federation. 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 antiferromagnetic ordered states we show the formation of a paired-spin ordered state |···↑↑↓↓···⟩ as a consequence of the phase degree of freedom between condensates. Postprint Peer reviewed