| Speaker: | Laurent Freidel (Perimeter) |
|---|---|
| Title: | Quantum Null Ray: "covariant quantization" |
| Date (JST): | Wed, Mar 18, 2026, 15:30 - 17:00 |
| Place: | Seminar Room A |
| Abstract: |
In this talk, I'll review the construction of gravitational constraints and of the corresponding phase space along generalized Horizons. I will focus my expose on the study of the Raychauduri Constraint and its quantization, which describes the dynamics of quantum null rays. I will show that the gauge invariant observables can be constructed through the construction of a Quantum reference frame for time and show that the generator of reorientation is the covariant area element. I will also describe element of the quantization procedure of the gravitational constraint which can be achieved using two essential new tools: First the construction of a background independent version of the normal ordering and then the reabsorption of the quantum anomaly into an effective deformation of the gravitational phase space. If time permits, I'll comment on some new phenomenological possibilities associated withe these results and more generally with the quantization of field theoretical reference frames. |
