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January 2026

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Wednesday, January 7th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Analyticity of the black hole S-matrix
Anna Wolz, UCLA,
12:30pm – 1:30pm
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Community Gathering: One Year After the LA Fires

Beckman Mall
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
New Frontiers in Exoplanet Imaging and Pathways to Habitable Worlds
Jason Wang, Assistant Professor, Department of Physics & Astronomy, Northwestern,
Friday, January 9th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Constraints on Long-Range Forces in De Sitter Space
Kurt Hinterbichler, Case Western Reserve University,
12:00pm – 1:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
Limitations of Noisy Geometrically Local Quantum Circuits
Joel Rajakumar, University of Maryland,
Monday, January 12th, 2026
4:00pm – 5:00pm
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High Energy Physics Seminar

Online and In-Person Event
CMB constraints on non-minimally coupled ultralight dark matter
Subhajit Ghosh, University of Texas, Austin,
7:30pm – 9:30pm
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Astronomy on Tap

"Black Holes" and "Radio Astronomy"
Jesse Han, Postdoctoral Fellow, Department of Astronomy, Stanford,
Allison Matthews, Postdoctoral Fellow, Carnegie Observatories,
Tuesday, January 13th, 2026
1:00pm – 2:00pm
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IQIM Postdoctoral and Graduate Student Seminar

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Quantum Sensing of Gravitational Frame-Dragging and Time Dilation with a Superfluid 4He Gyrometer
Kai Ellers, UC Berkeley,
4:00pm – 5:00pm
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Chemical Physics Seminar

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Water at the Edge: On- Water Spectroscopy across Oil Droplets, Protein Surfaces, Biomolecular Condensate and Living Cells
Wei Min, Professor of Chemistry, Department of Chemistry, Columbia University,
Wednesday, January 14th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Hollow-grams: Generalized Entanglement Wedges from the Gravitational Path Integral
Sami Kaya, UC Berkeley,
12:00pm – 1:00pm
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Logic Seminar

Online Event
Idealistic equivalence relation remastered
Filippo Calderoni, Assistant Professor, Mathematics Department, Rutgers University,
12:15pm – 1:00pm
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Caltech/IPAC Lunch Seminar

IPAC 102 (Large Conference Room)
NEO Surveyor's Survey Strategy: Robustness Studies & Trade-Offs
Garrett Levine, UCLA,
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
From cosmic web to molecular clouds: the multiple scales of galaxy evolution
Amelie Saintonge, Director, Max Planck Institute for Radio Astronomy,
4:00pm – 5:00pm
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Quantum Matter Seminar

East Bridge 114
From Kramers' legacies in Bloch electrons to a new class of strongly correlated Fe-based transition metal dichalcogenides
Yichen Zhang, Ph.D. Student, Department of Physics, Rice University,
Thursday, January 15th, 2026
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
Spectral Reciprocity and Arithmetic Applications
Liyang Yang, Postdoctoral Scholar, Department of Mathematics, Caltech,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Quantum Computing Enhanced Sensing
Soonwon Choi, Assistant Professor of Physics, Department of Physics, MIT,
Friday, January 16th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Hamiltonian approach to near extremal black hole physics
Per Kraus, UCLA,
11:00am – 12:00pm
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Math Teaching Seminar

Linde Hall 387
Using electronic assessment to test and improve proof comprehension
Juma Zevick Otieno, Doctoral Researcher, Department of Mathematics and Earth Sciences, University of Trieste,
12:00pm – 1:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
Computation-Protected Phases of Matter
Soonwon Choi, MIT,
1:00pm – 2:00pm
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High Energy Theory Seminar

Online and In-Person Event
Negative energies and the breakdown of bulk lengths in JT gravity
Shreya Vardhan, Caltech,
Monday, January 19th, 2026
4:00pm – 5:00pm
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Astronomy Tea Talks

Cahill 370
The sparkling end of compact binaries: mergers, Pa 30, and other animals
Ilaria Caiazzo, Professor, Institute of Science and Technology Austria,
Tuesday, January 20th, 2026
2:30pm – 6:30pm
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Greater Together: UK-US Space Collaboration Symposium

Chen 100
4:00pm – 5:00pm
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Mathematics Colloquium

Linde Hall 310
First moment obstructions
Huy Tuan Pham, Assistant Professor of Mathematics and Rosenberg Scholar, Department of Mathematics, Caltech,
4:00pm – 5:00pm
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Quantum Matter Seminar

East Bridge 114
Optically driven many-body phases in one dimension
Matteo Mitrano, Assistant Professor of Physics, Department of Physics, Harvard,
Wednesday, January 21st, 2026
8:30am – 2:30pm
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Red Cross Blood Drive January 2026

Hameetman Center 220 - Multipurpose Room
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
A Berry phase for algebras in holography
Jeremy van der Heijden, University of British Columbia,
12:00pm – 1:00pm
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Logic Seminar

Online Event
Comeager isomorphism classes in zero-dimensional dynamics
Todor Tsankov, Université Claude Bernard Lyon 1,
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
Core-Collapse Supernovae in 3D: New Theoretical Insights
Adam Burrows, Professor, Department of Astrophysical Sciences, Princeton University,
4:00pm – 5:00pm
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Materials Science Research Lecture

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Artificial oxide quantum heterostructures and twisted membranes
Honyung Lee, PhD, Corporate Fellow and Senior Advisor, Materials Science and Technology Division, Oak Ridge National Laboratory,
7:30pm – 8:30pm
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Watson Lecture - Lead Contamination: An Old Foe Rises from the Ashes of the Eaton Fire, with Francois Tissot

Beckman Auditorium
Francois Tissot, professor of geochemistry; Heritage Medical Research Institute Investigator,
Thursday, January 22nd, 2026
12:00pm – 1:00pm
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Applied Physics Seminar

Watson 104
Advances in Low-Noise, High-Speed SiGe BiCMOS for LEO Satellite Communications and Optical Interconnects
Pascal Chevalier, PhD, Analog/RF Technology Architect and Fellow of Technical Staff, STMicroelectronics,
2:00pm – 3:00pm
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Special TAPIR Seminar

Online and In-Person Event
Modified Theories of Gravity, Parity, and the Dark Sector
Tatsuya Daniel, Postdoctoral Fellow, Trottier Space Institute, McGill University,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
The condensed fundamental group of a scheme
Peter Haine, Assistant Professor, Department of Mathematics, USC,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
StarShot – from Metaphotonics to Spacecraft
Harry A. Atwater, Otis Booth Leadership Chair, Division of Engineering and Applied Science, Howard Hughes Professor of Applied Physics and Materials Science, Caltech,
Friday, January 23rd, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Large extra dimensions from higher-dimensional inflation
Ignatios Antoniadis, LPTHE - Laboratoire de Physique Théorique et Hautes Énergies,
1:00pm – 2:00pm
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High Energy Physics Seminar

Online and In-Person Event
Modified Theories of Gravity, Parity, and the Dark Sector
Tatsuya Daniel, McGill University,
2:00pm – 3:00pm
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Geometry & Topology Seminar

Linde Hall 310
Large-scale consequences of nonnegative Ollivier-Ricci curvature
Tom Hutchcroft, Professor, Mathematics, Caltech,
2:00pm – 3:00pm
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TAPIR Seminar

Online and In-Person Event
Waveform Systematics Across the Gravitational-Wave Spectrum: From LIGO to LISA
Aasim Jan, Graduate Student, Center for Gravitational Physics, University of Texas, Austin,
3:00pm – 4:00pm
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Geometry & Topology Seminar

Linde Hall 310
Concavity Properties of Dirichlet Eigenfunctions
Malik Tuerkoen, UC Irvine,
8:00pm – 10:00pm
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Stargazing Lecture

Cahill Center for Astronomy and Astrophysics
"Simulating Galaxies, Stars, Planets, and Giant Black Holes on a Computer"
Phil Hopkins, Ira S. Bowen Professor of Theoretical Astrophysics, Caltech,
Monday, January 26th, 2026
4:00pm – 5:00pm
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Joint Los Angeles Topology Seminar (1/2)

Linde Hall 310
Closed-strings mirror symmetry for semiprojective toric manifolds
Filip Zivanovic, Professor, Department of Mathematics, SUNY Stonybrook,
5:00pm – 6:00pm
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Joint Los Angeles Topology Seminar (2/2)

Linde Hall 310
The Last Kervaire Invariant Problem
Zhouli Xu, Professor, Department of Mathematics, UCLA,
Tuesday, January 27th, 2026
12:00pm – 1:00pm
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Graduate Student Seminar

Linde Hall 255
A new bound for the critical point of the FK model for q<1
Tejas Oke, Graduate Student, Department of Mathematics, Caltech,
Wednesday, January 28th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Particle-Soliton Degeneracy in 2D QCD from Spontaneously Broken Non-invertible Symmetry
Diego Garcia Sepulveda, Harvard University,
12:00pm – 1:00pm
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Logic Seminar

Online Event
Hyperfinite partial orders
Patrick Lutz, Assistant Professor, Department of Mathematics, University of Michigan,
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
Galaxy Evolution in the Resolved Universe
Daniel Weisz, Associate Professor of Astronomy; Head Graduate Advisor, Astronomy Department, UC Berkeley,
Thursday, January 29th, 2026
1:00pm – 2:00pm
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Combinatorics Seminar

Linde Hall 387
Most regular graphs are Ramanujan
Theo McKenzie, Stanford Science Fellow, Department of Mathematics, Stanford,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Rachel Rosen, Associate Professor of Quantum Field Theory and Gravity, Department of Physics, Carnegie Mellon University,
Friday, January 30th, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Exploring Entropy-Positivity Bounds
Rachel Rosen, Carnegie Mellon University,
12:00pm – 1:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
Entanglement oscillations and many-body quantum scars
Nicholas O'Dea, Princeton,