Welcome and Challenge Room: G.03

John Donoghue - Higher Derivative Theories

• John Donoghue

Room: G.03

Mikhail Shaposhnikov - How many new particles do we need?

• Mikhail Shaposhnikov

Room: G.03

Kirill Krasnov Colloquium Talk - Metric geometry and differential forms

• Krill Krasnov

Room: G.03 The story I am presenting revolves around a strange and unfamiliar to most people geometric construction, which encodes a metric on a manifold into a collection of differential forms on the same manifold. There are many known examples, in diverse dimensions. In three dimensions this coincides with the encoding of a metric into a frame, but higher dimensional examples are much more sophisticated. One of the aims of the talk is to explain what is behind these phenomena. We will see that the construction that encodes a metric into a collection of differential forms has a spinor origin. Moreover, the encoding is always that for a pair (metric, spinor) = differential forms. I will give a detailed explanation of how this works in four dimensions, where the encoding is that into a triple of 2-forms. I will explain how four-dimensional Einstein equations are very efficiently described by this formalism. I will explain the generalisation to eight dimensions, which has only been worked out recently. I will also explain the physics motivations behind these investigations, which have to do with the idea of the dimensional reduction and the fact that all known fields can be coded into a metric and a spinor in a sufficiently high number of dimensions.

Ana Bonaca - The Milky Way as a cosmological laboratory

• Ana Bonaca

Room: G.03

Will Percival - Measuring H0 and dark energy with DESI Room: G.03

Ue-Li Pen - Hubble constant from diffractive lensing of nanohertz gravitational waves

• Ue-Li Pen

Room: G.03

Christopher Berry - Gravitational-wave astronomy: Black holes and fundamental physics

• Christopher Berry

Room: G.03

Jonathan Oppenheim - A postquantum theory of classical gravity?

• John Oppenheim

Room: G.03

Claudia de Rham - Positivity with Gravity?

• Claudia de Rham

Room: G.03

Neil Turok - A Minimal SM/LCDM Cosmology

• Neil Turok (The University of Edinburgh)

Room: G.03

Sayantani Bhattacharya - Dynamical black holes in large number of space time dimensions

• Sayantani Bhattacharya

Room: G.03

Neal Dalal - AGN HBT OMG!

• Neal Dalal

Room: G.03

Irene Valenzuela - The Dark Dimension and the Swampland

• Irene Valenzuela

Room: G.03

Kendrick Smith - Fast Radio Bursts and Cosmology with the CHIME and CHORD radio telescopes

• Kendrick Smith

Room: G.03

Andrew Tolley - Massive gravity, Vainshtein mechanism and TTbar deformations

• Andrew Tolley

Room: G.03

Astrid Eichhorn - Probing quantum gravity at all scales

• Astrid Eichhorn

Room: G.03

Martin Bucher - Searching for the 21 cm Global Signal

• Martin Bucher

Room: G.03

Elias Kiritsis - Reheating at Strong Coupling

• Elias Kiritsis

Room: G.03

Andrew Hamilton - Unification of the four forces in the Spin(11,1) geometric algebra

• Andrew Hamilton

Room: G.03

Andy Taylor - A Simple Self-Tuning Universe to Solve the Cosmological Constant Problem

• Andy Taylor

Room: G.03

Closing Discussion (chaired by John Peacock)

• John Peacock

Room: G.03