[tw-hepnet] Next NYCU Tuesday HEP seminar

[Anthony Francis]

Dear all,

This is the announcement for our next HEP seminar at IoP-NYCU in SC427 at 14:20. More info on the speaker, title and abstract can be found below. More seminars this term are listed here:

https://lattice.phys.nycu.edu.tw/hep_seminars_2025.html

Everybody is very welcome to join.

See you there!

Anthony Francis

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Date: 30/09/25
Speaker: Calvin Y.-R. Chen
Title: Gravity for field theorists
Abstract: 

General Relativity (GR) is widely accepted to correctly describe gravity at low energies, which describes the effects of gravitation in terms of the non-linear evolution of spacetime itself. While this geometric picture of GR is indispensable for relativists working on gravity, a different and arguably more fundamental perspective is that gravity is the theory of a non-trivial interacting theory of massless spin-2 particles.
In the first half of this talk, my aim is to introduce gravity to a field theory audience by making this connection explicit, drawing heavy parallels with electromagnetism. In the second half, I will switch gear and talk about recent work on electromagnetic duality symmetries for spin-1 and -2 fields in four dimensions, and how to make these manifest at the level of the action.

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Prof. Dr. Anthony Francis 

afra...@nycu.edu.tw 

Institute of Physics

National Yang Ming Chiao Tung University

[Anthony Francis]

Dear all,

This is the announcement for our next HEP seminar at IoP-NYCU in SC427 at 14:20. More info on the speaker, title and abstract can be found below. More seminars this term are listed here:

https://lattice.phys.nycu.edu.tw/hep_seminars_2025.html

Everybody is very welcome to join.

See you there!

Anthony Francis

# ###########################

Date: 07/10/25
Speaker: Harry Goodhew
Title: The Cosmological Implications of Unitarity
Abstract: The initial conditions of our universe appear to us in the form of a classical probability distribution that we probe with cosmological observations. In the current leading paradigm, this probability distribution arises from a quantum mechanical wavefunction of the universe. In this talk, I will discuss how the cosmological bootstrap allows us to straightforwardly calculate observables from a small set of physical principles, in particular showing that the requirement of unitary time evolution, colloquially the conservation of probabilities, fixes the analytic structure of the wavefunction of the universe and of all the cosmological correlators it encodes.