Hi all,
I will give this week's talk will in HIT K51 at 5pm on Tuesday. Title and abstract below.
Cheers, Roger
--- "Boxworld is boring"
I will present recent work where we have shown that the allowed reversible dynamics in box-world (a hypothetical theory in which all non-signalling correlations are permitted) are trivial. A corollary of this result is that boxworld is not compatible with "fundamental reversibility" (the ability to see any physical process as a reversible one on a larger space). In other words, a universe with the state space of boxworld must be irreversible, even at the microscopic level. An interesting open question is which theories are fundamentally reversible? The answer to this question may go a long way towards homing in on quantum theory...