马承德  助理教授学术报告

Title: Lattice Chiral Fermion without Hermiticity

Speaker: Chen-Te Ma

Affiliation: Shree Guru Gobind Singh Tricentenary University, India

Time: 16:00-17:00, Friday,  22nd May, 2026 (UTC+8, Beijing Time)

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

Inviter: Jie Gu（顾杰）

Abstract

Lattice quantum field theory enables numerical studies of strongly interacting systems. However, fermions on a lattice suffer from the fermion doubling problem, where naive discretization produces unphysical extra particles. This issue arises because the lattice derivative produces a sine function with multiple zeros, resulting in multiple low-energy modes. The Nielsen–Ninomiya theorem elucidates that this dilemma cannot be circumvented within a Hermitian framework without compromising essential physical principles. In this talk, I introduce a simple alternative approach based on a one-sided (non-Hermitian) lattice derivative that naturally avoids doubling while preserving the correct continuum limit. I will also present numerical results for interacting models, demonstrating consistency with theoretical expectations.

Speaker

Chen-Te Ma is a tenure-track Assistant Professor at Shree Guru Gobind Singh Tricentenary University. 

He was previously a tenure-track Assistant Professor at Great Bay University. He held postdoctoral positions at Iowa State University, South China Normal University, and the University of Cape Town. He received his Ph.D. and M.S. degrees from National Taiwan University and his B.S. degree from Fu Jen Catholic University.

His research interests include string theory, holography, AdS/CFT correspondence, quantum chaos, quantum entanglement, random matrix theory, double field theory, and lattice field theory.

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