Hello. This would indeed be interesting to study, but at the moment, smell only has a suspected potential to play some part in diagnosing the disease or understanding how it works. There is no research that shows that fragrances can actually help. There has been a research trying to find a vague correlation between the sense of smell and Alzheimer's but it could not be replicated.

I would also be extremely cautious of any doctors or self-claimed scientists who use the word "quantum" unnecessarily. It's a new trend in pseudo-science and unfortunately this person is using it as a marketing trick to sell essential oils. There is nothing "quantum" about essential oils.

The most important thing in science is to cross-reference and check your sources. It is essential in order to separate true scientific research and smart but misleading marketing tricks! :)