Theoretical Physicist

Alfredo Guevara

Roger Dashen Member

Institute for Advanced Study, Princeton

About

I am currently the Roger Dashen member at the school of Natural Sciences at the Institute for Advanced Study (IAS) in Princeton. I previously served as a Junior Fellow at the Harvard Society of Fellows, and as a BHI Fellow at Harvard University Black Hole Initiative and at the Center for the Fundamental Laws of Nature.

I am interested in diverse aspects of high-energy physics, astrophysics and quantum gravity. During my PhD I studied how Scattering Amplitudes, one of the signature objects in Quantum Field Theory, can be used to understand both classical and quantum aspects of gravity.

I am currently pursuing research related to black hole physics, broadly understood. This involves tools from S-Matrix theory, celestial holography, quantum information and machine learning, among others.

Recent Projects

String web scattering configuration: external strings ending on D3-branes meeting at a single interaction point

Single-Minus Graviton Amplitudes from Matrix Theory

A. Guevara, A. Lupsasca, J. Maldacena, A. Strominger

We recently posted a new article describing the connection of single-minus amplitudes with matrix theory, the proposed non-perturbative definition of M-theory. It turns out that the matrix model reproduces them exactly, for any number of gravitons: each amplitude is secretly a count of bound states of strings stretched between branes.

arXiv: 2608.25239

RMHD simulation snapshots and training loss curves

Reconstructing Relativistic Magnetohydrodynamics with Physics-Informed Neural Networks

C. Cheung, M. Johnson-Noya, M. Xiang, D. Chang, A. Guevara

Development of the first physics-informed neural-network surrogates for relativistic magnetohydrodynamics, combining PDE-characteristic methods with a novel MUON optimizer to project RMHD dynamics across one and two spatial dimensions.

arXiv: 2512.23057

Near-extremal black hole with SDTN and event horizon diagram

New Near Extremal Black Holes and Love Symmetry

A. Guevara, U. Kol

A novel category of near-extremal black holes with (2,2) signature possessing an exact integrable SL(2,ℝ)×SL(2,ℝ) structure, featuring a photon ring exterior and an infinite Eguchi-Hanson throat controlled by Love symmetry.

arXiv: 2511.18637

Noncommutative Klein space and torus structure

Celestial Quantum Error Correction I: Qubits from Noncommutative Klein Space

A. Guevara, Y. Hu

Quantum error correction in celestial CFT via noncommutative geometry in Kleinian hyperkähler spacetimes, constructing 2-qubit stabilizer states robust against soft spacetime fluctuations with discrete symmetries corresponding to the Clifford group.

arXiv: 2312.16298