Past Events

Gravity, Quantum Geometry and Field Theory Unit (Reiko Toriumi)

Past Events

[Seminar] An Invitation to Topological String Theory (Dr. Kento Osuga, University of Sheffield, UK)

2021-01-21

L4F01 (Lab 4, floor F)

Title: An Invitation to Topological String Theory

Abstract: I will introduce the beauty of interplay among quantum field theory in various dimensions. More concretely, I will give an elementary review of fascinating relations among topological A-models and B-models, Chern-Simons theory, Seiberg-Witten theory, and matrix models. This talk will be designed for nonexperts so everyone in theoretical physics is welcome to join, including students. Research talks with more technical details may follow next week (and onwards) if there are interests.

Visit: Dr. Kento Osuga (Postdoctoral Research Associate, University of Sheffield)

2021-01-12 to 2021-02-25

Visit: Dr. Kento Osuga (Postdoctoral Research Associate, University of Sheffield)

[Zoom Seminar] Tensor Field Theories: Renormalization and Random Geometry (Dr. Nicolas Delporte, Toriumi Unit)

2020-11-30

Zoom or L4F01 (Lab 4, Floor F)

Title: Tensor Field Theories: Renormalization and Random Geometry

Abstract: In the talk, I will share an overview of my research during my PhD thesis. After a practically-minded introduction to renormalization and conformal field theories (CFT), we will see the essential tools developed for tensor models and their large-$N$ expansion. In the second part, I will focus on results of $d>1$ tensor field theories: melonic CFTs, breaking of symmetries. In the last part, we will revive an old approach to study and renormalize an interacting scalar quantum field theory on Galton-Watson random trees, through random walks, which may prove useful for tensor models to escape the melonic large-$N$ limit.

Zoom:

https://oist.zoom.us/j/94081328725?pwd=aFBTdkUvZTdXVU1BYTd6bTUvZHJKdz09

Meeting ID: 940 8132 8725
Passcode: 609087

Colored Tensor Models Review by Yi-Shan

2020-11-26

Discussion Room Level F

Presentation

Colored Tensor Models Review by Yi-Shan

2020-11-16

L4F01

Weekly presentaion

Faculty Lunchtime Seminar: Quantum Gravity, Quantum Observables, Wilson Loops, and Geometric Flux (Prof. Reiko Toriumi, OIST)

2020-11-10

L4E48, Lab 4, OIST

Title: Quantum Gravity, Quantum Observables, Wilson Loops, and Geometric Flux

Abstract: I will brainstorm and introduce you to the type of problems that I tend to think about in quantum gravity. The title suggests some of the key concepts that I will visit in this talk in order to arrive at the recent interesting result that my collaborators and I discovered, namely, the notion of geometric flux in gravity.