Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-11-24
JETP Letters V81 N2 (2005) pp. 47-52
Physics
Condensed Matter
Statistical Mechanics
10 pages, 4 figures
Scientific paper
10.1134/1.1887913
We extend the picture of a transfer of nuclear spin-1/2 polarization along a homogeneous one-dimensional chain with the XY-Hamiltonian to the inhomogeneous chain with alternating nearest neighbour couplings and alternating Larmor frequencies. To this end, we calculate exactly the spectrum of the spin-1/2 XY-Hamiltonian of the alternating chain with an odd number of sites. The exact spectrum of the XY-Hamiltonian is also applied to study the multiple quantum (MQ) NMR dynamics of the alternating spin-1/2 chain. MQ NMR spectra are shown to have the MQ coherences of zero and $\pm$ second orders just as in the case of a homogeneous chain. The intensities of the MQ coherences are calculated.
Fel'dman Edward B.
Rudavets M. G.
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