Description
We consider discrete quantum gravity models in which the early universe is described by a finite discrete history rather than an infinite past. Such a history can be viewed as a finite depth local quantum circuit acting on a simple seed state, which immediately links the microscopic circuit complexity of the resulting cosmological boundary state to the complexity of the underlying quantum dynamics. Within this framework we identify simple, low parameter families of allowed deviations from the standard Bunch–Davies vacuum for primordial gravitational waves.
