Thomas Dumitrescu 副教授学术报告

Title: Aspects of QED in 2+1 Dimensions

Speaker: Thomas Dumitrescu

Affiliation: University of California, Los Angeles, USA（美国加利福尼亚大学洛杉矶分校）

Time: 10:00-11:00 am, Friday, December 12th, 2025 (UTC+8, Beijing Time)

Venue: Zoom Meeting (ID: 385 442 0225; Passcode: yauc)

Inviter: Zhijin Li (李志金)

Abstract

I will discuss massless Dirac fermions interacting with a relativistic photon in 2+1 spacetime dimensions. After reviewing what is known about the dynamics of this strongly-coupled theory in the Lorentz-invariant vacuum, I will study it in the presence of a uniform magnetic field. When the field is sufficiently strong, this problem can be solved exactly. The resulting ground state spontaneously breaks some of the global symmetries, and we can precisely compute the spectrum of excitations and the low-energy effective action in this state.

Speaker

Assoc. Prof. Thomas Dumitrescu, PhD from Princeton University (advisor: Nathan Seiberg), Postdoc at Harvard University (2013-2018), since then at the Mani L. Bhaumik Institute for Theoretical Physics at UCLA (currently as Associate Professor).

The seminar will be broadcasted online by Zoom.

Interested people are free to join, without registration in advance.

The Zoom info is

URL: https://us02web.zoom.us/j/3854420225?pwd=SXY4eWJKOTBFZWJDaE16aXpTamY1QT09

Meeting ID: 385 442 0225

Passcode: yauc