Speaker
Description
The fundamental asymmetry between space and time in the conventional formalism of quantum theory, namely that temporal correlation between events must be described as a quantum channel and that spatial correlation between systems must be represented as a multipartite quantum state, has posed a huge problem to physicists who seek quantum description of spacetime or unification of classical and quantum theories, because there is no such asymmetry in classical probability theory. In this talk, we present an approach that aims to solve this problem by introducing quantum state over time, a formalism that describes temporal quantum correlation in terms of generalized quantum states over systems in temporal separation. Moreover, we show that the uniqueness of a certain quantum state over time function known as the Fullwood-Parzygnat function from a set of physically motivated axioms.
