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Detection of multiple-quantum coherences with projective nuclear magnetic resonance measurement
Authors:Lee Jae-Seung  Khitrin A K
Institution:Department of Chemistry, Kent State University, Kent, Ohio 44242-0001, USA.
Abstract:It is shown that in nuclear magnetic resonance, multiple-quantum (MQ) coherences can be detected "instantly" by exploiting the principle of quantum-mechanical projective measurement. Therefore, the mixing period, which involves collective multispin dynamics and converts MQ coherences into observable single-quantum coherence (magnetization), is not necessary. The experimental examples are given for two finite clusters: benzene in liquid crystal and liquid crystal 4'-n-pentyl-4-cyanobiphenyl, and for solid adamantane with an infinite network of dipolar couplings.
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