Any research backing alpha waves and impact on subconscious mind
For anyone interested, I believe to have found one such published article: Hypnotic Susceptibility increased by EEG Alpha Training by DAVID R. ENGSTROM, PERRY LONDON &amp; JOSEPH T. HART.

In the article, they describe the correlation between hypnotic susceptibility and alpha waves. Here is one of the relevant lines:


  Results were analysed by correlation techniques and by analysis of variance and covariance. They indicate that hypnotic susceptibility and operant alpha rhythm are positively related both before and after the subjects received alpha training.