Multiple decoherence-free states in multi-spin systems
Autor: | Hogben, H. J., Hore, P. J., Kuprov, I. |
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Rok vydání: | 2011 |
Předmět: | |
Zdroj: | Journal of Magnetic Resonance, 211 (2011) 217-220 |
Druh dokumentu: | Working Paper |
DOI: | 10.1016/j.jmr.2011.06.001 |
Popis: | 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. Comment: 13 pages, 3 figures, 1 Table. Supplementary information included after main text |
Databáze: | arXiv |
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