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QI: Fachverband Quanteninformation

QI 23: Quantum Control

QI 23.3: Vortrag

Donnerstag, 21. März 2024, 10:00–10:15, HFT-FT 131

Qunatum Information Storage in Cavity Coupled Spin Ensembles — •Michael Schilling and Jószef Zsolt Bernád — Forschungszentrum Jülich, Jülich, Deutschland

Recent investigations have highlighted the potential of spin ensembles coupled to a cavity as a robust platform for quantum information storage, demonstrating remarkable coherence times of 500ms. A primary challenge in this context is the efficient absorption of photons by the spin ensemble from external sources. We have developed a semi-analytical framework to significantly enhance this absorption process, achieving an 1.7-fold speedup compared to existing methodologies. Additionally, to maintain the integrity of quantum information stored within the ensemble, we optimize quantum operations, facilitating the implementation of dynamical decoupling sequences. To this end we expanded upon the Hierarchical Equations of Motion (HEOM) method, enabling its application to quasi-continuous distributions of spins.

Keywords: Quantum Optimal Control; Ensemble Dynamics; Hierarchical Equations of Motion