Scaling of dipolar interactions and time reversal experiments in polycrystalline adamantane

A.D. DENTE; L. BULJUBASICH; P.R. LEVSTEIN; H.M. PASTAWSKI; A.K CHATTAH

Rio de Janeiro

Encuentro; 18th ISMAR Meeting; 2013

Associação de Usuários de Ressonância Magnética Nuclear

Solid state NMR is an ideal test-bed to study decoherence in many-body quantum systems. The decoherence process can be quantified through the Loschmidt Echo (LE). LE is generated by reverting the time evolution of a system and is experimentally implemented by changing the sign of the involved Hamiltonian. We present a new pulse sequence with a symmetric character for the Forward and Backward secular evolution, to study a scaled dipolar dynamics and the decoherence process, using the Loschmidt Echo. The scaling factor goes from 0 (Lee-Goldburg) to 1/2 using off-resonance r.f irradiation, that allows to compare with the Magic Echo and Lee-Goldburg conditions