de Graaf, S E; Jayaraman, A; Kubatkin, S E; Danilov, A V; Ranjan, V (2024) Scaling of self-stimulated spin echoes. Applied Physics Letters, 124 (2). 024001

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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 Er3+ electron spins in the CaWO4 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.

Item Type:	Article
Subjects:	Quantum Phenomena > Quantum Information Processing and Communication
Divisions:	Quantum Technologies
Identification number/DOI:	10.1063/5.0176953
Last Modified:	24 Apr 2024 10:04
URI:	https://eprintspublications.npl.co.uk/id/eprint/9966