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arXiv · 2309.11169

Scaling of self-stimulated spin echoes

Sebastian de Graaf·Aditya Jayaraman·Sergey Kubatkin·Andrey Danilov·Vishal Ranjan
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Abstract

Self-stimulated echoes have recently been reported in the high cooperativity and inhomogeneous coupling regime of spin ensembles with superconducting resonators. In this work, we study their relative amplitudes using echo-silencing made possible by a fast frequency tunable resonator. The highly anisotropic spin linewidth of Er$^{3+}$ electron spins in the CaWO$_4$ crystal also allows to study the dependence on spin-resonator ensemble cooperativity. It is demonstrated that self-stimulated echoes primarily result from a combination of two large control pulses and the echo preceding it.

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Sebastian de Graaf, Aditya Jayaraman, Sergey Kubatkin, Andrey Danilov, Vishal Ranjan. 2023-09-20. Scaling of self-stimulated spin echoes. https://arxiv.org/abs/2309.11169

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