Instability in the Hartmann--Hahn double resonance
Roei Levi, Sergei Masis, Eyal Buks
TL;DR
This paper investigates the dynamics of coupled spins under the Hartmann-Hahn technique, revealing conditions under which the system becomes unstable, which has implications for magnetic resonance sensitivity enhancement.
Contribution
It provides a theoretical analysis of instability regions in the Hartmann-Hahn double resonance, identifying conditions for experimental observation.
Findings
Identification of parameter regions leading to instability
Discussion of experimental conditions for observing instability
Insights into spin dynamics under external driving
Abstract
The Hartmann-Hahn technique allows sensitivity enhancement of magnetic resonance imaging and spectroscopy by coupling the spins under study to another spin species that is externally driven. Here we theoretically study the coupled spins' dynamics, and find that for a certain region of driving parameters the system becomes unstable. The required conditions for making this region of instability becoming experimentally accessible are discussed.
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