Title: What is a Quantum Causal Set?

Abstract: In causal set quantum gravity, the space of locally finite partially ordered sets (causal sets) replaces the history space of continuum spacetimes. The continuum approximation of the theory is defined as follows: (i) the elements of the casual set correspond to spacetime events in a causal Lorentzian spacetime (M,g) (ii) the order relation between elements corresponds to the causal ordering of the events (iii) on an average, the number of these “fundamental” elements in a spacetime region gives the continuum spacetime volume of that region. In this talk I will give an overview of causal set theory and discuss the challenges in quantising the theory. I will discuss the two broad approaches to quantisation, with a focus on some recent results.

Talk – Video

Talk – Slides