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

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.
 Subjects: Quantum Gases (cond-mat.quant-gas); Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Journal reference: Phys. Rev. B 96, 155403 (2017) DOI: 10.1103/PhysRevB.96.155403 Cite as: arXiv:1704.04811 [cond-mat.quant-gas] (or arXiv:1704.04811v1 [cond-mat.quant-gas] for this version)

Submission history

From: Helgi Sigurdsson [view email]
[v1] Sun, 16 Apr 2017 20:05:09 UTC (4,677 KB)