Multiple decoherence-free states in multi-spin systems

Autor: Hogben, H. J., Hore, P. J., Kuprov, I.
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