Decoherence and Spin Echo in Biological Systems

TL;DR

This paper extends the spin echo technique to biological systems with strong dynamical noise, demonstrating significant signal restoration in chlorophyll dimers through analytical and numerical methods.

Contribution

It introduces an exact differential equation approach to analyze decoherence and spin echo effects in bio-complexes under strong noise conditions.

Findings

Restoration of free induction decay signals in chlorophyll dimers

Analytical and numerical validation of the approach

Applicable to a wide range of bio-relevant parameters

Abstract

The spin echo approach is extended to include bio-complexes for which the interaction with dynamical noise is strong. Significant restoration of the free induction decay signal due to homogeneous (decoherence) and inhomogeneous (dephasing) broadening is demonstrated analytically and numerically, for both an individual dimer of interacting chlorophylls and for an ensemble of dimers. This approach is based on an exact and closed system of ordinary differential equations that can be easily solved for a wide range of parameters that are relevant for bio-applications.