There's an interesting speculation as to how an Epstein Drive could work in reality. The heat management problem is pretty central: http://toughsf.blogspot.com

There's an interesting speculation as to how an Epstein Drive could work in reality. The heat management problem is pretty central: http://toughsf.blogspot.com/2019/10/the-expanses-epstein-drive.html http://toughsf.blogspot.com/2019/10/the-expanses-epstein-dri... The discussion at the bottom of the page has also a lot of interesting ideas.