Codimension-2 defects and higher symmetries in (3+1)D topological phases
Barkeshli, M Chen, Y Huang, S Kobayashi, R Tantivasadakarn, N Zhu, G SciPost Physics volume 14 issue 4 (11 Apr 2023)
Non-Hermitian Wave Mechanics: An Unorthodox Way into Embedded Systems
Tellander, F Berggren, K
Human mobility-based spatial decay models of unsafe and safe water usage in rural Uganda
Reitzug, F Kabatereine, N Nabatte, B Eyre, M Lambiotte, R Chami, G (28 Jun 2025)
Approximating Large-Scale Hessian Matrices Using Secant Equations
Fowkes, J Gould, N Scott, J ACM Transactions on Mathematical Software volume 51 issue 2 1-21 (30 Jun 2025)

The consultation on the University's draft Strategic Plan 2025-30 closes at midnight on Sunday 3 August.

The Strategic Plan consultation team want to reach as many staff as possible as this is an important opportunity for them to help shape the University's direction over the next five years. 

There are plenty of cricket fans in the department. We even used to have an annual North v South match. So, in the week of England v India at Lord's in London, the so-called home of cricket, here's one of our big fans talking about one of Lord's quirks. 

Described by the official English Cricket account on TikTok as "just brilliant". And you thought TikTok wasn't a prestigious journal.

Groundwater dynamics beneath a marine ice sheet
Gabriel, C Hewitt, I Graham, B The Cryosphere
Wed, 16 Jul 2025
14:00
L5

Twistor-space gauge-theory amplitudes from off-shell functionals

Hiren Kakkad
(Shanghai Tech)
Abstract

I will present a pair of off-shell functionals in position space, localized on the self-dual and the anti-self-dual planes which naturally give the Parke-Taylor denominator. These can therefore be used: 
i) to compute scattering amplitudes of particles with different spins and helicities; and 
ii) develop a Lagrangian description. 
Using Witten's half-Fourier transform, I will express these functionals in twistor space and present the kernels in a closed compact form. For even multiplicities, I will show how to obtain this form geometrically which than then be “folded” to get the one-less odd-multiplicity result. 
 

Wed, 16 Jul 2025
11:30
L5

Chiral fields for massive higher spins

Dr Alex Ochirov
(Shanghai Tech)
Abstract

I will review some recent developments in effective field theory of  composite higher-spin particles, namely, Zinoviev's massive gauge symmetry and 
the new chiral-field approach. The latter approach was inspired by a simple spinor-helicity structure first singled out by Arkani-Hamed, Huang and Huang, which encodes the higher-spin information of two massive particles. It turned out to be persistent in tree-level amplitudes with any number of additional identical-helicity gluons or gravitons, leading to the discovery of the chiral-field approach. I will mention the applications of massive higher-spin scattering amplitudes to classical gravitational dynamics of rotating black  holes. 
 

Patrick Farrell and Dawid Kielak have been announced as speakers at the 2026 International Congress of Mathematicians in Philadelphia (where the Fields Medals are handed out).

Chris Holmes and Juliet Rousseau from Stats are also speaking.

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