(2024-03-12) Seminar: Alexey Koshelev -- Infinite derivative gravity, String Field Theory and stubs


Alexey Koshelev  助理教授学术报告

Title: Infinite derivative gravity, String Field Theory and stubs

Speaker: Alexey Koshelev

Affiliation: School of Physical Science and Technology, ShanghaiTech University(上海科技大学物质科学与技术学院)

Time: 16:00-17:00, Tuesday, 12th March, 2024 (UTC+8, Beijing Time)

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

Inviter: Zhijin Li (李志金)


In my talk I will explain how infinite derivatives naturally arise in consideration of quantum properties of general gravity theories. I will construct the most general propagator around Minkowski and (anti)-de Sitter backgrounds proving that an infinite tower of derivatives is inevitable in order to exorcise ghosts. Then I will show that this construction has a direct relation to strings, especially to string field theory. I will elaborate on the issue of ghosts and on a connection with a recent idea of stubs in QFT and SFT.


Prof. Alexey Koshelev graduated from Moscow State University in 2000 and received his Ph.D. degree in Theoretical physics from Steklov Mathematical Institute of Russian Academy of Sciences in 2003.

He did postdoctoral research in the University of Crete, the Free University of Brussels, and was a PI in the University of Beira Interior.

He moved to ShanghaiTech University in early 2023 as the PI Assistant Professor leader of the newly forming Fundamental Physics group.


The seminar will be broadcasted online by Zoom.

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

The Zoom info is


Meeting ID: 385 442 0225

Passcode: yauc