Superhyperfine Decoherence in Erbium Quantum Technologies

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This presentation explores the role of rare-earth materials, specifically Er³⁺ ions, in advancing quantum technologies. It delves into photon echo experiments performed at low magnetic fields, emphasizing the analysis of superhyperfine effects and their influence on coherence times. Key findings include field-dependent decay modulation and the impact of the screening effect and nuclear coupling distribution. Models such as the superhyperfine coupling and spherical approximation aid in...