Abstract
Determining the availability of evolution pathways in quantum systems, which is important to a variety of spectroscopies, is often accomplished with a pathway selection scheme (PSS). In the absence of pulsed field gradients, the availability of an evolution pathway is only determined after combining the results from multiple experiments in a PSS. In this work, we provide a general method for determining the availability of evolution pathways within a single experiment by converting a PSS into a pathway selective pulse (PSP) sequence that excites the quantum system only if the selected pathways are available. Liquid-state NMR demonstrations of a PSP that nutates a spin only in the presence of heteronuclear coupling is presented.
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