engleski

Inter-pulse delay optimization for dynamical decoupling pulse sequences with up to six refocusing pulses

We present a computational optimization of the inter-pulse delays of multiple π pulse dynamical decoupling pulse sequences, aiming to preserve the coherence of electron spin embedded in strongly coupled proton spin environments more efficiently. We consider all centrosymmetric multiple π-pulse spin echo pulse sequences in the range of three to six π- pulses and parametrize them using up to two free parameters. The parameter space is then surveyed using the nuclear spin bath model and cluster correlation expansion methods. We find one maximum of coherence preservation within the constrained parameter space for each total number of π-pulses applied and obtain optimized parameters accordingly. We observe that the optimized regimes are essentially identical for both polycrystalline and glassy matrix structures of the proton spin environment. Our methodology also produces good agreements with experimental results reported in the literature.

Electron paramagnetic resonance spectroscopy ; Spin model, Polycrystalline material, Glass material, Organic solids ; Spin-spin interactions ; Molecular dynamics

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