**Monday, March 2, 2020**

Gravity Initiative Lunch

“The Breakdown of Weak Null Singularities Inside Black Holes”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 12:30 PM

Speaker(s): Maxime Van De Moortel, Princeton University**Description:**The characterization of singularities inside black holes is a fundamental problem in General Relativity. While the celebrated “mass inflation” scenario suggests that a weakly *singular* Cauchy horizon forms inside generic black holes (near time-like infinity), the global structure of the black hole interior boundary has largely remained unexplored. I will present my recent proof that, in the context of the spherical collapse of a charged scalar field, the weakly singular Cauchy horizon breaks down in finite retarded time and gives way to either a r = 0 “crushing type” singularity, or a locally naked singularity emanating from the center of symmetry.

**Tuesday, March 3, 2020**

Pheno & Vino Seminar

“The 2 to 3 Frontier in NNLO LHC Calculations”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): Alexander Mitov, Cavendish Lab, Cambridge**Description:**For the last 5 years or so, there has been a major effort towards the calculation of two-loop 5-point QCD amplitudes and their corresponding LHC cross-sections at NNLO. Very recently, the first such calculation - 3-photon production - was completed [arXiv:1911.00479]. I will explain the novel features, and lessons learned, in regard to 5-point two-loop QCD amplitudes. I will also present a detailed comparison of the new NNLO predictions for 3-photon production with existing LHC measurements. Such a comparison is of particular interest given the discrepancy between NLO predictions and data. This calculation represents a stepping stone for tackling another LHC milestone: 3-jet production in NNLO QCD. An update on the ongoing 3-jet calculation will be given. The seminar should be of interest to both theorists and LHC experimentalists.

**Friday, March 6, 2020**

High Energy Theory Seminar

“Modular Invariance in Superstring Theory from N=4 Super-Yang-Mills”

Location: Princeton University, 407 Jadwin Hall, PCTS Seminar Room

Time: 1:45 PM

Speaker(s): Silviu Pufu, Princeton University**Description:**In this talk, I will first review some of the recent progress on computing holographic correlators using analytic bootstrap techniques combined with supersymmetric localization, focusing on the case of the N = 4 super-Yang-Mills theory. From taking a certain flat space limit of the holographic correlators, one can obtain scattering amplitudes of gravitons in string theory, and one can then reproduce some of the known results for these scattering amplitudes. In particular, from instanton effects in the N=4 SYM theory, I will explain how to reproduce the non-holomorphic Eisenstein series known to appear in type IIB string theory scattering amplitudes.

**Monday, March 9, 2020**

Gravity Initiative Lunch

“TBA”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 12:30 PM

Speaker(s): Martin Lesourd, Harvard BHI

**Monday, March 9, 2020**

High Energy Theory Seminar

“TBA”

Location: *Princeton University, 407 Jadwin Hall, PCTS Seminar Room*

Time: 2:30 PM

Speaker(s): Hongbin Chen, Boston University

**Tuesday, March 10, 2020**

PCTS Deep Learning for Physics Seminar

“Extracting Physical Equations Using Deep Learning”

Location: *Princeton University, 407 Jadwin Hall, PCTS Seminar Room*

Time: 11:45 AM

Speaker(s): Shirley Ho, Flatiron Institute, Princeton University and Carnegie Mellon University

Note:Each talk will be preceded with lunch at 11:45 am. The talks will be held from 12:25-1:30 pm. Please check the specific date for room location.

**Description:**We will begin with lunch at 11:45 and the talk will start at 12:25 pm

Please use this link to register to attend, https://forms.gle/y2ZjoQ9unLNqYYcY9

We study a general approach to extract interpretable representations of physical laws learned by graph networks by constraining the representations of interactions and using symbolic regression or program synthesis to estimate algebraic physical equations. We demonstrate how our approach can recover force laws and Hamiltonians from different varieties of graph networks. We also demonstrate an improved generalization to larger systems than those on which the model was trained. Finally, we demonstrate the explicit extraction of the symbolic form of Newton’s law from real solar system data. More broadly, our technique may be used to infer unknown physical laws by interpreting the representations obtained by deep learning architectures.

**Tuesday, March 10, 2020**

Pheno & Vino Seminar

“Quantum Computing and Machine Learning in High Energy Data Analysis”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): Prasnth Shyamsundar, University of Florida**Description:**Recently there has been a growing interest in the application of quantum computing and machine learning in many scientific disciplines, including high energy physics. In the first half of this talk, we will look at a novel quantum computing based technique to search for unmodeled deviations from a simulated expectation in high-dimensional collider data. In the second half, we will look at some ways in which the goals of machine learning, as it is used currently in analyses, are not perfectly aligned with the physics goals of the analyses. We will also look at ways of rectifying the demonstrated misalignments.

**Friday, March 13, 2020**

High Energy Theory Seminar

“TBA”

Location: Bloomberg Lecture Hall (IAS)

Time: 1:45 PM

Speaker(s): Wei Song, Member, School of Natural Sciences, Institute for Advanced Study; Tsinghua University

**Monday, March 16, 2020**

High Energy Theory Seminar

“Covariant Phase Space with Boundaries”

Location: Bloomberg Lecture Hall (IAS)

Time: 2:30 PM

Speaker(s): Daniel Harlow, Massachusetts Institute of Technology**Description:**The Hamiltonian formulation of mechanics has many advantages, but its standard presentation destroys manifest covariance. This can be avoided by using the "covariant phase formalism" of Iyer and Wald, but until recently this formalism has suffered from several ambiguities related to boundary terms and total derivatives. In this talk I will present a new version of the formalism which incorporates boundary effects from the beginning. This eliminates all ambiguities, and leads to an algorithmic procedure for covariantly constracting the phase space and Hamiltonian of any Lagrangian field theory. It also allows us to confirm that the Poisson bracket in covariant phase space is indeed equivalent to an old proposal of Peierls for computing Poisson brackets covariantly. Along the way I'll illustrate the formalism using various examples. Based on work with Jie-qiang Wu.

**Friday, March 20, 2020**

High Energy Theory Seminar

“TBA”

Location: Bloomberg Lecture Hall (IAS)

Time: 1:45 PM

Speaker(s): Adam Levine, Member, School of Natural Sciences, Institute for Advanced Study

**Monday, March 23, 2020**

Gravity Initiative Lunch

“TBA”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 12:30 PM

Speaker(s): Lia Medeiros, Institute for Advanced Study

**Monday, March 23, 2020**

High Energy Theory Seminar

“Efficient Rules for All Conformal Blocks: A Dream Come True”

Location: Jadwin Hall Room 343

Time: 2:30 PM

Speaker(s): Valentina Prilepina, Laval University**Description:**In this talk, I will lay out a set of efficient rules for computing d-dimensional global conformal blocks in arbitrary Lorentz representations in the context of the embedding space operator product expansion (OPE) formalism. With these rules in place, the general procedure for determining all possible conformal blocks is reduced to (1) identifying the relevant group theoretic quantities and (2) applying the conformal rules to obtain the blocks. The rules represent a systematic prescription for computing the blocks in a convenient mixed OPE-three-point- function basis as well as a set of rotation matrices, which are necessary to translate these blocks to the pure three-point function basis relevant for the conformal bootstrap. I will start by tracing their origin by describing some of the essential ingredients present in the formalism that naturally give rise to these rules. I will then map out the derivation of the rules, first outlining the general algorithm for the rotation matrices and then proceeding to the conformal blocks. Along the way, l will introduce a convenient diagrammatic notation (somewhat reminiscent of Feynman diagrams), which serves to encode parts of the computation in a compact form. Finally, I will treat several interesting examples to demonstrate the application of these rules in practice.

**Tuesday, March 24, 2020**

Pheno & Vino Seminar

“TBA”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): JiJi Fan, Brown University

**Thursday, March 26, 2020**

Hamilton Colloquium Series

“TBA”

Location: Jadwin Hall Room A10

Time: 4:00 PM

Speaker(s): Andrei Beloborodov, Columbia University

**Monday, March 30, 2020**

Gravity Initiative Lunch

“TBA”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 12:30 PM

Speaker(s): Matthew Heydeman, Princeton University

**Monday, March 30, 2020**

High Energy Theory Seminar

“TBA”

Location: Bloomberg Lecture Hall

Time: 2:30 PM

Speaker(s): Gabriele Veneziano, CERN

**Thursday, April 2, 2020**

Hamilton Colloquium Series

“TBA”

Location: Jadwin Hall Room A10

Time: 4:00 PM

Speaker(s): Justin Read, University of Surrey

**Friday, April 3, 2020**

High Energy Theory Seminar

“TBA”

Location: *Princeton University, 407 Jadwin Hall, PCTS Seminar Room*

Time: 1:45 PM

Speaker(s): Martin Fluder, Princeton University

**Monday, April 6, 2020**

High Energy Theory Seminar

“TBA”

Location: *Princeton University, 407 Jadwin Hall, PCTS Seminar Room*

Time: 2:30 PM

Speaker(s): Mark Mezei, Stony Brook University

**Tuesday, April 7, 2020**

Deep Learning for Physics

Location: TBA

Time: 11:45 AM

Speaker(s): TBA

Note: Each talk will be preceded with lunch at 11:45 am. The talks will be held from 12:25-1:30 pm. Please check the specific date for room location.**Description:**

**Tuesday, April 7, 2020**

Pheno & Vino Seminar

“TBA”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): Nicolas Garavito-Camargo, University of Arizona

**Thursday, April 9, 2020**

Hamilton Colloquium Series

“TBA”

Location: Jadwin Hall Room A10

Time: 4:00 PM

Speaker(s): Monika Schleier-Smith, Stanford University

**Monday, April 13, 2020**

High Energy Theory Seminar

“TBA”

Location: Bloomberg Lecture Hall (IAS)

Time: 2:30 PM

Speaker(s): Uri Kol, New York University

**Tuesday, April 14, 2020**

Pheno & Vino Seminar

“TBA”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): Michael Geller, Tel Aviv University

**Friday, April 17, 2020**

High Energy Theory Seminar

“TBA”

Location: Bloomberg Lecture Hall (IAS)

Time: 1:45 PM

Speaker(s): Raghu Mahajan, Member, School of Natural Sciences, Institute for Advanced Study

**Monday, April 20, 2020**

Gravity Initiative Lunch

“TBA”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 12:30 PM

Speaker(s): Yakov Shlapentokh-Rothman, Princeton University

**Tuesday, April 21, 2020**

Pheno & Vino Seminar

“TBA”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): Tongyan Lin, University of California, San Diego

**Thursday, April 23, 2020**

Donald R. Hamilton Lecture

“Field Guide to the Second Quantum Revolution”

Location: Princeton University McDonnell A02

Time: 8:00 PM

Speaker(s): Steven Girvin, Yale University**Description:**The first quantum revolution brought us the great technological advances of the 20

^{th}century—the transistor, the laser, the atomic clock and GPS, the global positioning system. A ‘second quantum revolution’ is now underway based on our relatively new understanding of how information can be stored, manipulated and communicated using strange quantum hardware that is neither fully digital nor fully analog. We now realize that 20^{th}century hardware does not take full advantage of the power of quantum mechanics. While we do not yet fully understand all aspects of this power, it may lead to computational capabilities exponentially beyond those of today’s computers. Even more remarkable than the concept of quantum computation, is the concept of quantum error correction. Rapid theoretical and experimental progress has brought us to the threshold of the era of practical quantum error correction, and it may soon become possible to carry out nearly perfect computations using imperfect hardware. This talk will give a gentle introduction to the basic concepts that underlie this quantum information revolution.

**Monday, April 27, 2020**

Gravity Initiative Lunch

“TBA”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 12:30 PM

Speaker(s): Fani Dosopoulou, Princeton University

**Tuesday, April 28, 2020**

Pheno & Vino Seminar

“TBA”

Location: Jadwin Hall Room 303

Time: 4:00 PM

Speaker(s): Siddharth Mishra-Sharma, New York University

**Thursday, April 30, 2020**

Hamilton Colloquium Series

“TBA”

Location: Jadwin Hall Room A10

Time: 4:00 PM

Speaker(s): Jenny Greene, Princeton University

**Monday, May 4, 2020**

Gravity Initiative Workshop

“Exploring Supermassive Black Holes”

Location: Jadwin Hall, PCTS Seminar Room, 4th Floor

Time: 8:00 AM

**Description:**

**Monday, May 4, 2020**

Princeton Gravity Initiative / PCTS Workshop

“Exploring Supermassive Black Holes”

Location: Jadwin Hall, Princeton Gravity Initiative, 4th Floor

Time: 8:00 AM

**Description:****Speakers:**

Fabio Antonini

Julie Comerford

Suvi Gezari

Yuri Levin

Xin Liu

Chung-Pei Ma

Brian Metzger

Diego Munoz

Smadar Naoz

**Tuesday, May 5, 2020**

Gravity Initiative Workshop

“Exploring Supermassive Black Holes”

Location: Jadwin Hall, PCTS Seminar Room, 4th Floor

Time: 8:00 AM

**Description:**

**Wednesday, May 6, 2020**

Gravity Initiative Workshop

“Exploring Supermassive Black Holes”

Location: Jadwin Hall, PCTS Seminar Room, 4th Floor

Time: 8:00 AM

**Description:**

**Monday, July 13, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Monday, July 13, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Tuesday, July 14, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Tuesday, July 14, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Wednesday, July 15, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Wednesday, July 15, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Thursday, July 16, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Thursday, July 16, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Friday, July 17, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Friday, July 17, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Saturday, July 18, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Saturday, July 18, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Sunday, July 19, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Sunday, July 19, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Monday, July 20, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Monday, July 20, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Tuesday, July 21, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Tuesday, July 21, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Wednesday, July 22, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Wednesday, July 22, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Thursday, July 23, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Thursday, July 23, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Friday, July 24, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**

**Friday, July 24, 2020**

PiTP 2020

Time: 7:00 AM

**Description:**