Echo trains in pulsed electron spin resonance of a strongly coupled spin ensemble

Abstract

We report on a novel dynamical phenomenon in electron spin resonance experiments of phosphorus donors. When strongly coupling the paramagnetic ensemble to a superconducting lumped element resonator, the coherent exchange between these two subsystems leads to a train of periodic, self-stimulated echos after a conventional Hahn echo pulse sequence. The presence of these multi-echo signatures is explained using a simple model based on spins rotating on the Bloch sphere, backed up by numerical calculations using the inhomogeneous Tavis-Cummings Hamiltonian.

References in corpus (29)

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• Broadband electron paramagnetic resonance spectroscopy of ${}^{167}$Er:${}^7$LiYF${}_4$ at mK temperatures
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• Toy Model Challenging Prevailing Definitions of Classicality
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