TY - JOUR

T1 - Representation of population exchange at level anti-crossings

AU - Rodin, Bogdan A.

AU - Ivanov, Konstantin L.

N1 - Funding Information: Financial support. This research has been supported by the Russian Foundation for Basic Research (grant no. 20-53-15004) and the Ministry of Science and Education of the Russian Federation. Publisher Copyright: © Author(s) 2020

PY - 2020

Y1 - 2020

N2 - A theoretical framework is proposed to describe the spin dynamics driven by coherent spin mixing at level anti-crossings (LACs). We briefly introduce the LAC concept and propose to describe the spin dynamics using a vector of populations of the diabatic eigenstates. In this description, each LAC gives rise to a pairwise redistribution of eigenstate populations, allowing one to construct the total evolution operator of the spin system. Additionally, we take into account that in the course of spin evolution a “rotation” of the eigenstate basis case take place. The approach is illustrated by a number of examples, dealing with magnetic field inversion, cross-polarization, singlet-state nuclear magnetic resonance and parahydrogen-induced polarization.

AB - A theoretical framework is proposed to describe the spin dynamics driven by coherent spin mixing at level anti-crossings (LACs). We briefly introduce the LAC concept and propose to describe the spin dynamics using a vector of populations of the diabatic eigenstates. In this description, each LAC gives rise to a pairwise redistribution of eigenstate populations, allowing one to construct the total evolution operator of the spin system. Additionally, we take into account that in the course of spin evolution a “rotation” of the eigenstate basis case take place. The approach is illustrated by a number of examples, dealing with magnetic field inversion, cross-polarization, singlet-state nuclear magnetic resonance and parahydrogen-induced polarization.

UR - http://www.scopus.com/inward/record.url?scp=85124640074&partnerID=8YFLogxK

UR - https://www.elibrary.ru/item.asp?id=48636574

U2 - 10.5194/mr-1-347-2020

DO - 10.5194/mr-1-347-2020

M3 - Article

AN - SCOPUS:85124640074

VL - 1

SP - 347

EP - 365

JO - Magnetic Resonance

JF - Magnetic Resonance

SN - 2699-0016

IS - 2

ER -