Thomas Hartog: I can think of it as an ensemble of many different patchwork classical realities, all of which are there in the wave function of the universe. But we don't know yet whether that's a grand overarching wave function and comprising all possible holographic theories or is there a limitation on the reach of physical theory. That remains to be seen.
Is there a multiverse, and if so, how should we think of ourselves within it? In many modern cosmological models, the universe includes more than one realm, with possibly different laws of physics, and these realms may or may not include intelligent observers. There is a longstanding puzzle about how, in such a scenario, we should calculate what we, as presumably intelligent observers ourselves, should expect to see. Today's guest, Thomas Hertog, is a physicist and longstanding collaborator of Stephen Hawking. They worked together (often with James Hartle) to address these questions, and the work is still ongoing.
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Thomas Hertog received his Ph.D. in physics from the University of Cambridge. He is currently a professor of theoretical physics at KU Leuven. His new book is On the Origin of Time: Stephen Hawking's Final Theory.
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