Triangle Seminars
Wednesday, 3 Dec 2025
Dualities in supersymmetric quantum mechanics (and DT4 invariants from graded quivers)
📍 London
Cyril Closset
(Birmingham University)
Abstract:
I will discuss Seiberg-like dualities of N=2 supersymmetric quantum mechanics (SQM), emphasizing new aspects compared to dualities of 2d N=(0,2) gauge theories. In particular, I will present new mutation dualities for 1d N=2 SQCD with unitary gauge group. I will also comment on the relationship between 1d N=2 quivers and DT4 invariants of local fourfolds.
I will discuss Seiberg-like dualities of N=2 supersymmetric quantum mechanics (SQM), emphasizing new aspects compared to dualities of 2d N=(0,2) gauge theories. In particular, I will present new mutation dualities for 1d N=2 SQCD with unitary gauge group. I will also comment on the relationship between 1d N=2 quivers and DT4 invariants of local fourfolds.
Posted by: Jesse van Muiden
Some universality in brane scattering
📍 London
Congkao Wen
(Queen Mary University London)
Abstract:
In this talk, I will discuss some features of heavy–heavy–light–light correlators in N=4 supersymmetric Yang–Mills theory, where the light operators belong to the stress-tensor multiplet and the heavy ones correspond to giant gravitons, realised holographically as D3-branes. I will focus on the associated Integrated Correlators, for which exact expressions can be obtained despite few results are known for the correlators themselves. I will highlight several interesting properties of these integrated correlators, especially the emergence of universal structures in the strong-coupling regime. I will also discuss different integrated correlators in certain N=2 superconformal field theories, which are holographically dual to scattering of gravitons (and gluons) in the presence of D7-branes. Surprisingly, these integrated correlators in N=2 theories are given by exactly the same strong coupling asymptotic series as those of giant gravitons, despite the fact that their weak coupling expansions are very different.
In this talk, I will discuss some features of heavy–heavy–light–light correlators in N=4 supersymmetric Yang–Mills theory, where the light operators belong to the stress-tensor multiplet and the heavy ones correspond to giant gravitons, realised holographically as D3-branes. I will focus on the associated Integrated Correlators, for which exact expressions can be obtained despite few results are known for the correlators themselves. I will highlight several interesting properties of these integrated correlators, especially the emergence of universal structures in the strong-coupling regime. I will also discuss different integrated correlators in certain N=2 superconformal field theories, which are holographically dual to scattering of gravitons (and gluons) in the presence of D7-branes. Surprisingly, these integrated correlators in N=2 theories are given by exactly the same strong coupling asymptotic series as those of giant gravitons, despite the fact that their weak coupling expansions are very different.
Posted by: Andrew Svesko
The magic of scattering amplitudes
📍 East of England
Chris White
(Queen Mary University of London)
Abstract:
In recent years, a growing community of researchers have been applying ideas from Quantum Information / Computing theory to high energy physics. Entanglement is one such quantity, but there are by now many others. This talk will examine the property of “magic” (also known as “non-stabliserness”) which, roughly speaking, measures whether quantum systems have a genuine computational advantage over their classical counterparts. I will review the origin of this concept, before describing recent applications from both collider physics and scattering amplitudes research. No prior knowledge of quantum computing will be assumed.
In recent years, a growing community of researchers have been applying ideas from Quantum Information / Computing theory to high energy physics. Entanglement is one such quantity, but there are by now many others. This talk will examine the property of “magic” (also known as “non-stabliserness”) which, roughly speaking, measures whether quantum systems have a genuine computational advantage over their classical counterparts. I will review the origin of this concept, before describing recent applications from both collider physics and scattering amplitudes research. No prior knowledge of quantum computing will be assumed.
Posted by: Julian Kupka
Thursday, 4 Dec 2025
Energy Correlators in CFTs
📍 London
Matthew Walters
(Heriot Watt)
Abstract:
One useful observable for studying QFT dynamics is the correlation between the total energy flux in different directions on the celestial sphere. I will discuss the computation of these energy correlators in the specific case of conformal field theories, where they can be obtained as a sum over conformal blocks. After reviewing some general properties of energy correlators in CFTs, I will show how they can be used to derive novel bounds on OPE coefficients involving the stress-energy tensor.
One useful observable for studying QFT dynamics is the correlation between the total energy flux in different directions on the celestial sphere. I will discuss the computation of these energy correlators in the specific case of conformal field theories, where they can be obtained as a sum over conformal blocks. After reviewing some general properties of energy correlators in CFTs, I will show how they can be used to derive novel bounds on OPE coefficients involving the stress-energy tensor.
Posted by: Nathan Moynihan