Preparation of pseudopure state in a cluster of dipolar-coupled spins with "unresolved" spectrum

Abstract

A method of creating pseudopure spin states in large clusters of coupled spins is described. It is based on filtering multiple-quantum coherence of the highest order followed by a time-reversal period and partial saturation. Experimental demonstration is presented for a cluster of six dipolar-coupled proton spins of a benzene molecule in liquid crystalline matrix, and the details of spin dynamics are studied numerically.

15 pages, 3 figures, submitted to Phys. Rev. A

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