Multiple decoherence-free states in multi-spin systems
Chemical Physics
2014-07-16 v3
Abstract
A numerical procedure is presented for mapping the vicinity of the null-space of the spin relaxation superoperator. The states populating this space, i.e. those with near-zero eigenvalues, of which the two-spin singlet is a well-studied example, are long-lived compared to the conventional T1 and T2 spin-relaxation times. The analysis of larger spin systems described herein reveals the presence of a significant number of other slowly relaxing states. A study of coupling topologies for n-spin systems (n = 4 - 8) suggests the symmetry requirements for maximising the number of long-lived states.
Keywords
Cite
@article{arxiv.1104.4883,
title = {Multiple decoherence-free states in multi-spin systems},
author = {H. J. Hogben and P. J. Hore and I. Kuprov},
journal= {arXiv preprint arXiv:1104.4883},
year = {2014}
}
Comments
13 pages, 3 figures, 1 Table. Supplementary information included after main text