Max Riegler (Harvard/Vienna): Geometric actions and flat space holography

Dienstag, 07. Januar 2020 13:45

Ort: Erwin‐Schrödinger‐Hörsaal, Boltzmanngasse 5, 5. Stock

In this talk I will talk about recent progress regarding flat space holography in three
spacetime dimensions.
I will argue that a Hamiltonian reduction of the Einstein‐Hilbert action with Bondi‐van der Burg‐Metzner‐Sachs (BMS) boundary conditions to future (past) null infinity yields a boundary action that is equivalent to the geometric action on BMS_3 coadjoint orbits.
This boundary action can then be used to calculate a variety of physically interesting quantities such as the one‐loop torus partition function, BMS blocks or (quantum corrections of) entanglement entropy.
A particular focus will be put on the computation of entanglement entropy, quantum corrections thereof and possible consequences for a theory of quantum gravity in 3D asymptotically flat spacetimes.


Erwin-Schrödinger-Hörsaal, Boltzmanngasse 5, 5. Stock

Foto: Barbara Mair