2017/04/16 by H. Sigurdsson, A. J. Ramsay, H. Ohadi +4
Physics and Astronomy · #cond-mat.quant-gas #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.96.155403
published as Phys. Rev. B 96, 155403 (2017)
arxiv created 2017/04/16 · arxiv updated 2017/10/11
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 |… \uparrow \uparrow \downarrow \downarrow … . ⟩ as a consequence of the phase degree of freedom between condensates.