Protons in a liquid-state NMR sample are probed at a Larmor frequency of at a…
PHYSICS · Multi-part · Fermi University Physics · Quantum Mechanics · Quantum Information & Technology · Physical realizations and quantum technologies
Quantum Information and Technology, Ch Trapped ions, neutral atoms, photons, NMR and spins in solids
Problem
Protons in a liquid-state NMR sample are probed at a Larmor frequency of ν=700MHz at a temperature T=310K.
((a)) Compute the thermal polarisation ϵ=hν/(2kBT).
((b)) The pseudo-pure signal available from an n-spin molecule scales as (n/2n)ϵ. Find the ratio of the pseudo-pure signal of a 15-spin molecule to that of a 3-spin molecule, at the same ϵ.