Abstract
Coherent experiments at very low temperatures have proven to be very useful tools in the study of the interaction between the two-level tunneling states in glasses /1/ and external fields. In particular, spontaneous and stimulated echo experiments /2/ have made it possible to directly investigate the resonant coupling of these states to RF electric fields and to ultrasonic phonons. Also the transverse lifetime T2 and -with limited accuracy- the longitudinal lifetime T1 of the tunneling states could be determined from these experiments.KeywordsRabi FrequencyTunneling ModelResonant CouplingDriving FieldTunneling StateThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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