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April 2026

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Wednesday, April 1st, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Relational Perspectives in Quantum Gravity: Quantum Reference Frames and the Observer Dependence of Entropy
Anne-Catherine de la Hamette, ETH Zurich,
12:00pm – 1:00pm
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Logic Seminar

Online Event
Gδ​ Circle Squaring
Spencer Unger, Assistant Professor, Department of Mathematics, University of Toronto,
12:15pm – 1:00pm
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Caltech/IPAC Lunch Seminar

IPAC 102 (Large Conference Room)
New Views on Extreme Starbursts: Clumps in Local ULIRGs with JWST
Laura Lenkic, Caltech/IPAC,
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
(Spatially) resolved clues about giant planets with JWST and friends
Laurent Pueyo, Associate Astronomer, Space Telescope Science Institute,
Thursday, April 2nd, 2026
2:30pm – 3:30pm
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Caltech/USC Joint Algebra & Geometry Seminar (1/2)

Linde Hall 187
TBD
Mee Song Im, Assistant Professor, Department of Mathematics, Johns Hopkins University,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra & Geometry Seminar (2/2)

Linde Hall 187
Gluing in Heegaard-Floer theory
Peng Zhou, Postdoc, Department of Mathematics, UC Berkeley,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
Sums along binary quartic forms
Mayank Pandey, PhD Candidate, Department of Mathematics, Princeton University,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Quantum Simulation of the Unknown: Observation of Pseudogap Physics in the Fermi–Hubbard Model at Ultralow Temperatures
Markus Greiner, Professor of Physics, Physics, Harvard,
Friday, April 3rd, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Navigating Collider Phenomenology with Light-Ray Operators & Chew-Frautschi Plot
Hao Chen, Massachusetts Institute of Technology,
12:00pm – 1:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
From Fractionalization to Superconductivity in Flat Chern Bands — And What AI Enables Next
Ahmed Abouelkomsan, MIT,
2:00pm – 3:00pm
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Geometry and Topology Seminar (1/2)

Linde Hall 310
Flexibility and degeneracy around a theorem of Thurston
Alex Nolte, Postdoc, Department of Mathematics, IHES,
2:00pm – 3:00pm
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TAPIR Seminar

Online and In-Person Event
Black-hole METRICS, ringdown and fundamental physics
Adrian Ka-Wai Chung, Postdoctoral Fellow, DAMTP, University of Cambridge,
3:00pm – 4:00pm
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Geometry and Topology Seminar 2/2

Linde Hall 310
Classification of ancient cylindrical mean curvature flows and the Mean Convex Neighborhood Conjecture
Yi Lai, Assistant Professor, Department of Mathematics, UCI,
Monday, April 6th, 2026
4:00pm – 5:00pm
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Astronomy Tea Talk

Cahill 370
Probing Binaries and Black Holes with Microlensing
Natasha Abrams, PhD candidate, UC Berkeley,
4:00pm – 5:00pm
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High Energy Physics Seminar

Online and In-Person Event
Flavor, Accidentally
Hannah Banks, New York University,
4:00pm – 5:00pm
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Quantum Matter Seminar

East Bridge 114
A quantum many-body index for 2d chiral superconductors
Nikita A. Sopenko, Mathematical Physics, Institute for Advanced Study (IAS),
Tuesday, April 7th, 2026
4:00pm – 5:00pm
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Chemical Physics Seminar

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Pushing Ab Initio Electron-Phonon Theory Beyond Perturbation: From Polaron Structure to Transport
Joonho Lee, Assistant Professor of Chemistry and Chemical Biology, Department of Chemistry and Chemical Biology, Harvard University,
Wednesday, April 8th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Spinspacetime: A New Chapter in Relativity
Joonhwi Kim, Caltech,
12:15pm – 1:00pm
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Caltech/IPAC Lunch Seminar

Online Event
Carbon dioxide and evidence for water in the Hottest exo-Neptune
Yoni Brande, University of Maryland,
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
Giant black hole jets and baryon feedback to the Cosmic Web
Martijn Oei, Troesh Postdoctoral Scholar Research Associate, Department of Astronomy, CalTech,
4:00pm – 5:00pm
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Special Quantum Matter Seminar

East Bridge 114
Quantum thermodynamics on superconducting circuits: bolometry and thermalization
Jukka Pekola, Professor, Department of Applied Physics, Aalto University, Helsinki, FI,
,
,
4:30pm – 6:00pm
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Building a Tiny Open-Source Space Program: From ChipSats to Autonomous Swarms

Chen 100
Thursday, April 9th, 2026
2:00pm – 3:00pm
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Special TAPIR Seminar

The emergence of globular clusters and globular-cluster-like dwarfs at the EDGE of galaxy formation
Ethan Taylor, Postdoctoral Fellow, School of Mathematics and Physics, University of Surrey, UK,
,
4:00pm – 7:00pm
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LA Probability Forum

Linde Hall 310
Ron Peled, Professor, Department of Mathematics, University of Maryland,
Shalin Parekh, Assistant Professor, Department of Mathematics, University of Maine,
Rahul Rajkumar, PhD Candidate, Department of Mathematics, UC Riverside,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
Higher theta series for reductive dual pairs and anomaly
Avi Zeff, Postdoc, Department of Mathematics, UC Berkeley,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Quantum Intelligence
Robert Huang, Assistant Professor of Theoretical Physics, PMA, Caltech,
Friday, April 10th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Scattering on the Coulomb Branch of N=4 SYM
Kelian Häring, University of Amsterdam,
1:00pm – 2:00pm
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High Energy Physics Seminar

Online and In-Person Event
A unified approach to the self force problem
Ira Rothstein, Carnegie Mellon University,
2:00pm – 3:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
Processing massive classical data on small quantum computers
Haimeng Zhao, Huang and Preskill groups,
2:00pm – 3:00pm
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TAPIR Seminar

Online and In-Person Event
Trapping in Strong Gravity: From Black Hole Images to Gravitational Turbulence
Alejandro Cárdenas-Avendaño, Assistant Professor, Physics Department, Wake Forest University,
Monday, April 13th, 2026
4:00pm – 5:00pm
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Astronomy Tea Talk

Cahill 370
Study of Exotic Stellar Populations in Open Clusters and Galactic Fields
Anju Panthi, Postdoc at Indian Institute of Astrophysics, Bangalore,
4:00pm – 5:00pm
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High Energy Physics Seminar

Online and In-Person Event
A Few Thoughts on Flavor
Claudio Manzari, Institute for Advanced Study,
4:00pm – 5:00pm
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Quantum Matter Seminar

East Bridge 114
Continuum Fractons
Shivaji Sondhi, Professor of Physics, Department of Physics, University of Oxford,
Tuesday, April 14th, 2026
11:00am – 12:00pm
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IQIM Postdoctoral and Graduate Student Seminar

Lauritsen 469
Controlling and Interrogating Matter at the Fundamental Limits of Space and Time
Mohammed Th. Hassan, University of Arizona,
3:00pm – 4:00pm
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Mathematics & Machine Learning Seminar

East Bridge 114
Toward Structural Guarantees in AI: Quantum Tensor Networks for Sensitivity, Uncertainty, and Reliable Inference
Pragatheeswaran Vipulanandan, PhD Candidate, Department of Electrical and Computer Engineering, University of Miami,
4:00pm – 5:00pm
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Mathematics Colloquium

Linde Hall 310
The Eisenstein Ideal
Mladen Dimitrov, Professor, Department of Mathematics, University of Lille,
Wednesday, April 15th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Ultralocal measure is not canonical
Maciek Kolanowski, UC Santa Barbara,
12:00pm – 1:00pm
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Logic Seminar

Online Event
Local Problems on Grids: FIID/FFIID Separations and a Failure of Baire Shift Universality
Katalin Berlow, PhD candidate, Department of Mathematics, UC Berkeley,
12:15pm – 1:00pm
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Caltech/IPAC Lunch Seminar

IPAC 102 (Large Conference Room)
The High Energy Radiation Environments of Sun-Like Stars with Directly Imageable Habitable Zones
Breanna Binder, Associate Professor, Cal Poly Pomona,
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
Do active galactic nuclei behave the way galaxy formation theorists need them to?
Michael Blanton, Observatories Director and Crawford M. Greenewalt Chair, Carnegie Science,
4:00pm – 5:00pm
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High Energy Physics Seminar

Online and In-Person Event
Axial vector form factors and the scalar charge of nucleons from lattice QCD
Rajan Gupta, Los Alamos National Laboratory,
Thursday, April 16th, 2026
2:30pm – 3:30pm
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Caltech/USC Joint Algebra and Geometry Seminar (1/2)

Linde Hall 187
Frobenius structures on quantum connections on Calabi--Yau 3-folds
Jae Hee Lee, Assistant Professor, Department of Mathematics, Stanford,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (2/2)

Linde Hall 187
Holomorphic Lagrangians in Higgs and de Rham Moduli Spaces
Shengjing Xu, Graduate Student, Department of Mathematics, University of Pennsylvania,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
On the Completions of General Period Mappings
Haohua Deng, John Wesley Young Research Instructor, Department of Mathematics, Dartmouth College,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Can Antiferromagnetic Order Survive Lattice Melting?
Daniel Podolsky, Condensed Matter & Materials Physics, Technion,
Friday, April 17th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Polar states in AdS3 holography
Ji Hoon Lee, ETH-Zurich,
12:00pm – 1:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
Quantum eigenvalue processing
Yuan Su, AWS Center for Quantum Computing,
2:00pm – 3:00pm
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Geometry and Topology Seminar (1/2)

Linde Hall 310
TBD
Eduardo Reyes, Assistant Professor, Department of Mathematics, Pontifical Caltholic University of Chile,
2:00pm – 3:00pm
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TAPIR Seminar

Online and In-Person Event
Crystallization, Convection, and Magnetism in White Dwarf Stars
Matias Castro-Tapia, Graduate Student, Department of Physics, McGill University,
3:00pm – 4:00pm
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Geometry and Topology Seminar (2/2)

Linde Hall 310
Systoles of hyperbolic hybrids
Sami Douba, Postdoc, Department of Mathematics, University of Bonn,