Publication

Multiple-quantum NMR with frequency-modulated chirp pulses

Geoffrey Bodenhausen
1992
Patents

Abstract

Frequency-modulated chirp pulses, for exciting multiple-quantum coherences over large bandwidths, can be considered as an alternative to composite pulses to combat the effects of large offsets and tilted effective fields. Refocusing of the phase dispersion of double-quantum coherence can be combined with suitable detection sequences to yield pure absorption 2-dimensional double-quantum spectra. The method of sym. excitation and detection by time-reversal may be applied to obtain t1-modulated longitudinal magnetization, which may then be converted into observable single-quantum coherence by a chirp echo sequence. Similar approaches can be used for many other NMR expts. involving coherence transfer. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/fc062f39-add2-46c3-a82f-2a9ef2cb3388

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Geoffrey Bodenhausen
1992
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/fc062f39-add2-46c3-a82f-2a9ef2cb3388

About this result

Related concepts (32)

Quantum decoherence

Quantum decoherence is the loss of quantum coherence, the process in which a system's behaviour changes from that which can be explained by quantum mechanics to that which can be explained by classical mechanics. In quantum mechanics, particles such as electrons are described by a wave function, a mathematical representation of the quantum state of a system; a probabilistic interpretation of the wave function is used to explain various quantum effects. As long as there exists a definite phase relation between different states, the system is said to be coherent.

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Multiple-quantum NMR with frequency-modulated chirp pulses

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