John Fahey, thought during his lifetime to be possibly more than a little crazy, was the author of some thirty albums of gnomically introverted droning guitar instrumentals, which I listened to heavily in my teens and twenties; I even produced an hour or so of banjo music in an imitative John Fahey style.
Hemingway's minimalism is based on the psychological mechanics of repression. An echo of his approach can be detected in a favorite trope of 1980s minimalists: a pattern of reference to dire secrets and hidden wounds these authors didn't realize they were supposed to have imagined.
Normally, most writers don't say, 'I'm going into a mild hypnotic trance.' Typically, they don't know how they do it. Most people, when they have a good experience writing, they're well placed in that state, which is also sometimes called a 'flow state.' If you don't have trouble, you don't have to think about it.