In the story a scientist finds her way to the realm of the dead - not heaven or hell, a real place where all the dead are sent, indiscriminately. This realm is a place that exists "behind" our world, sort of on another plane of existence. I don't want the scientist to access it by using a special machine or portal as this is a total cliché. I was hoping for her to access it through inducing a different state, of mind or body. Ideas I have had include her stimulating the brain in a certain way, inducing a certain emotion, altering body chemistry in some way or something molecular (you can see I'm quite the scientific expert, eh?
What kind of scientist would make this kind of discovery? Which scientific disciplines and job titles could I use to describe the above ideas?

