Relativistic quantum clocks — operational approach to quantum aspects of time and causality




University of Queensland

June 23, 2021 12:30 PM

In general relativity time requires an operational description, for example, associated with the state of an idealised clock following some spacetime trajectory. I will show that in quantum physics idealised clocks can be modelled as composite quantum particles and discuss what foundational insights into the notion of time and causal order is enabled by this approach. Finally, I will discuss how some of the associated new phenomena could be tested in near future experiments and thus help is probe the interface between quantum and gravitational physics.