Edge modes, extended TQFT, and measurement based quantum computation
 Wong, G Journal of High Energy Physics volume 2025 issue 6 (20 Jun 2025)

Cafe π news - Summer Specials

Cream Tea Special (27 June - 31 July) - treat yourself to a traditional cream tea for only £3.90: freshly baked scone + Tiptree strawberry jam + clotted cream + a drink

Afternoon Muffin Deal - buy any hot drink after 2pm and get a muffin for only £2. Available from Tuesday 1 July 

Salad & Drink Combo for lunch - any salad box or salad bar plus any drink for only £5.40

Renewal equations for mosquito-borne diseases
 Mills, C Alrefae, T Hart, W Kraemer, M Parag, K Thompson, R Donnelly, C Lambert, B Methods in Ecology and Evolution
Nonlinear Cauchy elasticity
 Yavari, A Goriely, A Archive for Rational Mechanics and Analysis volume 249 issue 5 (01 Sep 2025)
The Darboux classification of curl forces
 Yavari, A Goriely, A Journal of Physics A: Mathematical and Theoretical volume 58 issue 27 (03 Jul 2025)
The latent variable proximal point algorithm for variational problems with inequality constraints
 Dokken, J Farrell, P Keith, B Papadopoulos, I Surowiec, T Computer Methods in Applied Mechanics and Engineering volume 445 (12 Jul 2025)
Mon, 23 Jun 2025
13:00
L1

How to Count States in Gravity

Tom Yildirim
(University of Oxford)
Abstract

In this talk we will construct a basis of quantum gravity states by cutting the Euclidean path integral. These states are made by inserting heavy dust shell operators on the asymptotic boundary. We will use this basis to resolve two puzzles : 

(1) The two boundary gravity Hilbert space seemingly does not factorise, which is in tension with holography. 

(2) Gibbons and Hawking proposed the gravity thermal partition function is computed by the euclidean path integral with a periodic time boundary condition. Why is does this perform a trace over gravity states?

To resolve these puzzles we will introduce some tricks that simply the evaluation of the gravity path integral in the saddle point approximation. 

Reuben College Fellow?

Reuben College is currently advertising for two Governing Body Fellows and two Research Fellows – all within its AI & Machine Learning theme. The fellowships are open to those currently employed by the University in their substantive role, and start in September 2025.

Vacancies | Reuben College

Road closures on ROQ

Road closures that will happen just after Gate 7 from 14th July for 2.5 weeks, possibly 3 weeks: 

There will be pedestrian access down the side of maths to the East west link (next to Somerville)

No pedestrian access down past Gibson/ Harkness/ GTC during this time

Vehicle access will still be available from Gate 7 to car lifts and the revolving maths doors/ disabled parking

Image: Emily Pryor - Roadworks

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