Tuesday, April 1
4:00 pm - 5:00 pm	Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Wavepackets that Probe Electron transfer and Quantum-Like States Gregory D. Scholes, William S. Tod Professor of Chemistry, Department of Chemistry, Princeton University,
5:00 pm - 6:00 pm	Caltech-Tsinghua Joint Colloquium Online Event Virasoro and triplet vertex algebras at positive rational central charge Robert McRae, Yau Mathematical Sciences Center, Tsinghua University,

Wednesday, April 2
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Gregory Kaplanek, Syracuse University,
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Xiaoyi Liu, UC Santa Barbara,
12:15 pm - 1:00 pm	Caltech/IPAC Lunch Seminar IPAC 102 (Large Conference Room) The Sizes of Dwarf Galaxies Nushkia Chamba, NASA/Ames,
4:00 pm - 5:00 pm	ASTRONOMY COLLOQUIUM Cahill, Hameetman Auditorium AGN Variability: A Cornucopia or a Phantasmagoria? Matthew Graham, Research Professor of Astronomy, California Institute of Technology,

Thursday, April 3
2:45 pm - 3:45 pm	Algebra and Geometry Seminar Linde Hall 187 Non-archimedean periods for log Calabi-Yau surfaces Soham Karwa, Department of Mathematics, Duke University,
4:00 pm - 5:00 pm	Algebra and Geometry Seminar Linde Hall 187 Quantum K Rings of Partial Flags, Coulomb Branches, and the Bethe Ansatz Irit Huq-Kuruvilla, Department of Mathematics, Virginia Tech,

Friday, April 4
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Eric Perlmutter, IPhT-Saclay, Paris,
2:00 pm - 3:00 pm	TAPIR Seminar Online and In-Person Event Connecting Compact Object Dynamics with Multi-Messenger Observations in Dense Star Clusters Claire Ye, Postdoctoral Fellow, CITA, University of Toronto,
3:00 pm - 4:00 pm	Geometry and Topology Seminar Linde Hall 187 The L^2 Alexander torsion for 3-manifolds and sutured manifold theory Jianru Duan, School of Mathematical Sciences, Peking University,
8:00 pm - 10:00 pm	Stargazing Lecture Cahill Center for Astronomy and Astrophysics If You Give a Black Hole a Cookie Jean Somalwar, PhD Candidate, Department of Astronomy, Caltech,

Monday, April 7
1:30 pm - 2:30 pm	Presidential Distinguished Speaker Series: David Ho (BS '74) Athenaeum
4:00 pm - 5:00 pm	High Energy Physics Seminar Online and In-Person Event TBA Margarita Gavrilova, Cornell University,

Tuesday, April 8
4:00 pm - 5:00 pm	Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Roel Tempelaar, Assistant Professor of Chemistrry, Department of Chemistry, Northwestern University,

Wednesday, April 9
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Marc Klinger, University of Illinois Urbana-Champaign,
4:00 pm - 5:00 pm	ASTRONOMY COLLOQUIUM Cahill, Hameetman Auditorium TBD Jamie Bock, Marvin L. Goldberger Professor of Physics, JPL Senior Research Scientist, California Institute of Technology,

Thursday, April 10
4:00 pm - 5:00 pm	Physics Colloquium Online and In-Person Event Jonathan Simon, Stanford University,

Friday, April 11
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Sam Gralla, University of Arizona,
2:00 pm - 3:00 pm	Special Quantum Matter Seminar East Bridge 114 TBA Yizhi You, Professor, Northeastern University,
2:00 pm - 3:00 pm	TAPIR Seminar Online and In-Person Event Three-Dimensional Long-Term CCSN Simulations: New Insights and Challenges Tianshu Wang, Associate Fellow, N3AS, UC Berkeley,

Monday, April 14
4:00 pm - 5:00 pm	High Energy Physics Seminar Online and In-Person Event TBA Haibo Yu, UC Riverside,

Tuesday, April 15
4:00 pm - 5:00 pm	Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Renee Frontiera, Northrop Professor, Department of Chemistry, University of Minnesota,

Wednesday, April 16
4:00 pm - 5:00 pm	ASTRONOMY COLLOQUIUM Cahill, Hameetman Auditorium TBD Vikram Ravi, Assistant Professor of Astronomy, California Institute of Technology, ,

Thursday, April 17
3:00 pm - 7:00 pm	KISS Showcase and Caltech/JPL Networking Mixer Chen 100
4:00 pm - 5:00 pm	Physics Colloquium Online and In-Person Event Feedback control of open quantum systems: Looking back, looking forward Hideo Mabuchi, Stanford University,

Friday, April 18
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Sakura Schafer-Nameki, University of Oxford,
2:00 pm - 3:00 pm	TAPIR Seminar Online and In-Person Event Title to be announced Hengrui Zhu, Graduate Student, Department of Physics, Princeton University,

Wednesday, April 23
4:00 pm - 5:00 pm	ASTRONOMY COLLOQUIUM (Neugebauer Lecture) Cahill, Hameetman Auditorium TBD Jonas Zmuidzinas, Merle Kingsley Professor of Physics, California Institute of Technology,
7:30 pm - 8:30 pm	Watson Lecture - Smruthi Karthikeyan: The Secret Life of Superbugs: How Antimicrobial Resistance Moves Between Humans and the Environment Beckman Auditorium

Thursday, April 24
4:00 pm - 5:00 pm	Physics Colloquium - Christy Lecture Online and In-Person Event The Growing Danger of Nuclear Weapons: What You Can Do Fred Lamb, UIUC,

Friday, April 25
11:00 am - 12:00 pm	High Energy Theory Seminar Online and In-Person Event TBA Ho Tat Lam, Massachusetts Institute of Technology,

Monday, April 28
4:00 pm - 5:00 pm	High Energy Physics Seminar Online and In-Person Event TBA Anson Hook, University of Maryland,

Tuesday, April 29
4:00 pm - 5:00 pm	Chemical Physics Seminar Noyes 147 (J. Holmes Sturdivant Lecture Hall) Gabriela Schlau-Cohen, Professor of Chemistry, Department of Chemistry, Massachussetts Institute of Technology,

Wednesday, April 30
4:00 pm - 5:00 pm	ASTRONOMY COLLOQUIUM Cahill, Hameetman Auditorium TBD Nadia Zakamska, Professor, Department of Physics & Astronomy, Johns Hopkins University,