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13/14 PSI - Quantum Field Theory I - Lecture 10

Freddy Cachazo Perimeter Institute for Theoretical Physics

October 22, 2013

PIRSA:13100035
Algebraic structures in massive (2,2) theories

Davide Gaiotto Perimeter Institute for Theoretical Physics

October 22, 2013

PIRSA:13100117
Exact Results In Two-Dimensional (2,2) Supersymmetric Gauge Theories With Boundary

Kentaro Hori University of Tokyo

October 22, 2013

PIRSA:13100116
Conformal symmetry and cosmology

Austin Joyce University of Chicago
October 22, 2013

PIRSA:13100070
Astrophysics
13/14 PSI - Statistical Mechanics - Lecture 11

Anton Burkov University of Waterloo

October 22, 2013

PIRSA:13100059
Exact results for boundaries and domain walls in 2d supersymmetric theories

Takuya Okuda University of Tokyo

October 22, 2013

PIRSA:13100115
13/14 PSI - Quantum Field Theory I - Lecture 9

Freddy Cachazo Perimeter Institute for Theoretical Physics

October 21, 2013

PIRSA:13100034
Coisotropic branes, surface defects and mirror symmetry

Emanuel Diaconescu

October 21, 2013

PIRSA:13100113
Hybrid conformal field theories

October 21, 2013

PIRSA:13100114
13/14 PSI - Statistical Mechanics - Lecture 10

Anton Burkov University of Waterloo

October 21, 2013

PIRSA:13100058
Some simple extensions of Mathieu Moonshine

Shamit Kachru Stanford University

October 21, 2013

PIRSA:13100112
Topics in QFT on Flat and Curved Spacetimes - Lecture 9

Ugo Moschella University of Insubria

October 21, 2013

PIRSA:13100013

13/14 PSI - Quantum Field Theory I - Lecture 10

Freddy Cachazo Perimeter Institute for Theoretical Physics

October 22, 2013

PIRSA:13100035
Algebraic structures in massive (2,2) theories

Davide Gaiotto Perimeter Institute for Theoretical Physics

October 22, 2013

PIRSA:13100117

I will review some ongoing work on the low energy properties of D-branes/boundary conditions in massive two-dimensional field theories with (2,2) supersymmetry.
Exact Results In Two-Dimensional (2,2) Supersymmetric Gauge Theories With Boundary

Kentaro Hori University of Tokyo

October 22, 2013

PIRSA:13100116

We compute the partition function on the hemisphere of a class of two-dimensional (2,2) supersymmetric field theories including gauged linear sigma models. The result provides a general exact formula for the central charge of the D-brane placed at the boundary. It takes the form of Mellin-Barnes integral and the question of its convergence leads to the grade restriction rule concerning branes near the phase boundaries. We find expressions in various phases including the large volume formula in which a characteristic class called the Gamma class shows up. The two sphere partition function factorizes into two hemispheres glued by inverse to the annulus. The result can also be written in a form familiar in mirror symmetry, and suggests a way to find explicit mirror correspondence between branes.
Conformal symmetry and cosmology

Austin Joyce University of Chicago
October 22, 2013

PIRSA:13100070
Astrophysics
We will explore the role that conformal symmetries may play in cosmology. First, we will discuss the symmetries underlying the statistics of the primordial perturbations which seeded the temperature anisotropies of the Cosmic Microwave Background. I will show how symmetry considerations lead us to three broad classes of theories to explain these perturbations: single-field inflation, multi-field inflation, and the conformal mechanism. We will discuss the symmetries in each case and derive their model-independent consequences. Finally, we will examine the possibility of violating the null energy condition with a well-behaved quantum field theory.
13/14 PSI - Statistical Mechanics - Lecture 11

Anton Burkov University of Waterloo

October 22, 2013

PIRSA:13100059
Exact results for boundaries and domain walls in 2d supersymmetric theories

Takuya Okuda University of Tokyo

October 22, 2013

PIRSA:13100115

We apply supersymmetric localization to N=(2,2) gauged linear sigma models on a hemisphere, with boundary conditions, i.e., D-branes, preserving B-type supersymmetries. We explain how to compute the hemisphere partition function for each object in the derived category of equivariant coherent sheaves, and argue that it depends only on its K theory class. The hemisphere partition function computes exactly the central charge of the D-brane, completing the well-known formula obtained by an anomaly inflow argument. We also formulate supersymmetric domain walls as D-branes in the product of two theories. We exhibit domain walls that realize the sl(2) affine Hecke algebra. Based on arXiv:1308.2217.
13/14 PSI - Quantum Field Theory I - Lecture 9

Freddy Cachazo Perimeter Institute for Theoretical Physics

October 21, 2013

PIRSA:13100034
Coisotropic branes, surface defects and mirror symmetry

Emanuel Diaconescu

October 21, 2013

PIRSA:13100113
Hybrid conformal field theories

October 21, 2013

PIRSA:13100114

I will discuss a class of limiting points in the moduli space of d=2 (2,2) superconformal field theories. These SCFTs arise as IR limits of "hybrid" UV theories constructed as a fibration of a Landau-Ginzburg theory over a base Kaehler geometry. A significant generalization of Landau-Ginzburg and large radius geometric limit points, the hybrid theories can be used to probe general features of (2,2) and (0,2) SCFT moduli spaces.
13/14 PSI - Statistical Mechanics - Lecture 10

Anton Burkov University of Waterloo

October 21, 2013

PIRSA:13100058
Some simple extensions of Mathieu Moonshine

Shamit Kachru Stanford University

October 21, 2013

PIRSA:13100112

Mathieu Moonshine is a striking and unexpected relationship between the sporadic simple finite group M24 and a special Jacobi form, the elliptic genus, which arises naturally in studies of nonlinear sigma models with K3 target. In this talk, we first discuss its predecessor (Monstrous Moonshine), then discuss the current evidence in favor of Mathieu Moonshine. We also discuss extensions of this story involving `second quantized mirror symmetry,' relating heterotic strings on K3 to type II strings on Calabi-Yau threefolds.
Topics in QFT on Flat and Curved Spacetimes - Lecture 9

Ugo Moschella University of Insubria

October 21, 2013

PIRSA:13100013

Title	Date	Collection	Type	Info
13/14 PSI - Quantum Field Theory I - Lecture 10	2013‑10‑22	13/14 PSI - Quantum Field Theory I	Course	View details
Algebraic structures in massive (2,2) theories	2013‑10‑22	Physics Around Mirror Symmetry	Conference	View details
Exact Results In Two-Dimensional (2,2) Supersymmetric Gauge Theories With Boundary	2013‑10‑22	Physics Around Mirror Symmetry	Conference	View details
Conformal symmetry and cosmology	2013‑10‑22	Cosmology and Gravitation	Scientific Series	View details
13/14 PSI - Statistical Mechanics - Lecture 11	2013‑10‑22	13/14 PSI - Statistical Mechanics	Course	View details
Exact results for boundaries and domain walls in 2d supersymmetric theories	2013‑10‑22	Physics Around Mirror Symmetry	Conference	View details
13/14 PSI - Quantum Field Theory I - Lecture 9	2013‑10‑21	13/14 PSI - Quantum Field Theory I	Course	View details
Coisotropic branes, surface defects and mirror symmetry	2013‑10‑21	Physics Around Mirror Symmetry	Conference	View details
Hybrid conformal field theories	2013‑10‑21	Physics Around Mirror Symmetry	Conference	View details
13/14 PSI - Statistical Mechanics - Lecture 10	2013‑10‑21	13/14 PSI - Statistical Mechanics	Course	View details
Some simple extensions of Mathieu Moonshine	2013‑10‑21	Physics Around Mirror Symmetry	Conference	View details
Topics in QFT on Flat and Curved Spacetimes - Lecture 9	2013‑10‑21	Topics in QFT on Flat and Curved Spacetimes	Course	View details

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Format results

13/14 PSI - Quantum Field Theory I - Lecture 10

Algebraic structures in massive (2,2) theories

Exact Results In Two-Dimensional (2,2) Supersymmetric Gauge Theories With Boundary

Conformal symmetry and cosmology

13/14 PSI - Statistical Mechanics - Lecture 11

Exact results for boundaries and domain walls in 2d supersymmetric theories

13/14 PSI - Quantum Field Theory I - Lecture 9

Coisotropic branes, surface defects and mirror symmetry

Hybrid conformal field theories

13/14 PSI - Statistical Mechanics - Lecture 10

Some simple extensions of Mathieu Moonshine

Topics in QFT on Flat and Curved Spacetimes - Lecture 9

13/14 PSI - Quantum Field Theory I - Lecture 10

Algebraic structures in massive (2,2) theories

Exact Results In Two-Dimensional (2,2) Supersymmetric Gauge Theories With Boundary

Conformal symmetry and cosmology

13/14 PSI - Statistical Mechanics - Lecture 11

Exact results for boundaries and domain walls in 2d supersymmetric theories

13/14 PSI - Quantum Field Theory I - Lecture 9

Coisotropic branes, surface defects and mirror symmetry

Hybrid conformal field theories

13/14 PSI - Statistical Mechanics - Lecture 10

Some simple extensions of Mathieu Moonshine

Topics in QFT on Flat and Curved Spacetimes - Lecture 9