Spin resonance under topological driving fields

A. A. REYNOSO; J. P. BALTANÁS; H. SAARIKOSKI; J. E. VÁZQUEZ-LOZANO; J. NITTA; D. FRUSTAGLIA

NEW JOURNAL OF PHYSICS

IOP PUBLISHING LTD

Lugar: Londres; Año: 2017

1367-2630

We study the dynamics of a localized spin-1/2 driven by a time-periodic magnetic eld that undergoes a topological transition. Despite the strongly non-adiabatic eects dominating the spin dynamics, we find that the eld´s topology appears clearly imprinted in the Floquet spin states through an effective Berry phase emerging in the quasienergy. This has remarkable consequences on the spin resonance condition suggesting a whole new class of experiments to spot topological transitions in the dynamics of spins and other two-level systems, from nuclear magnetic resonance to strongly-driven superconducting qubits. (IOP Ref: NJP-106477)