25-30 August 2019
Henry Ford Building
Europe/Berlin timezone

Neural network processing of DEER with exchange coupling

Not scheduled
4h
Harnack House and Henry Ford Building

Harnack House and Henry Ford Building

Board: 506
Poster Posters

Speaker

Mr Steven Worswick (University of Southampton)

Description

Deep neural networks (DNNs) offer a powerful alternative to Tikhonov regularised analysis procedures for standard DEER data. DNNs can be trained on libraries of synthetic DEER traces, allowing them to learn a simulated reality which can include carefully modelled distortions and noise – we have shown that DNNs trained in this manner generalise well to real experimental data. [1]

The well-established Tikhonov methods involve a regularised fitting that relies on a simplified DEER kernel which neglects the exchange interaction (J) completely. In many situations this assumption is reasonable due to the distances and structure between spin-labels. However, the presence of a significant exchange coupling will complicate the interpretation of data under these regimes. It is also often desirable to be able to quantify the exchange coupling, this may present a significant challenge beyond the simpler cases. [2]

In this communication we present new functionality in DEERNet for analysis of DEER in the presence of exchange coupling. By training feed-forward DNNs using data simulated via the full kernel for DEER including exchange coupling, we are able to extract confident estimates for both the inter-spin distance distribution and the exchange interaction.

[1] S. G. Worswick, J. A. Spencer, G. Jeschke, I. Kuprov, Science Advances, 2018, 4, 1-7.
[2] S. Richert et al., Physical Chemistry Chemical Physics, 2017, 19, 16057-16061.

Primary authors

Mr Steven Worswick (University of Southampton) Prof. Gunnar Jeschke (ETH Zurich) Ilya Kuprov (University of Southampton)

Presentation Materials

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