[Theory-seminars] Theory Seminar Monday (hybrid) - Hersh Singh

[Zheng-Yang Li]

Dear all,

On Monday, February 24th, 2025 at 1:00PM EST, we will have a hybrid seminar given by Hersh Singh of Fermilab, in person in CC L102 and on the following Zoom link:

https://jlab-org.zoomgov.com/j/1603217363?pwd=uQDcZMymsGb7CXLmDhdDllamXDbKec.1

Please see below for the title and abstract.

Theory Seminar: February 24th, 1pm EST (hybrid)

Speaker: Hersh Singh (Fermilab)

Title: Improved Ginsparg-Wilson Hamiltonians and the Chiral Anomaly

Abstract: The Standard Model has resisted a nonperturbative definition for decades. This is due to the longstanding difficulty in formulating chiral gauge theories on the lattice. Attempts to understand the nature of global chiral symmetry on the lattice led to the Ginsparg-Wilson (GW) relation, which explained the good chiral properties of overlap and domain-wall fermions. The GW relation and its solutions have led to new theoretical insights on anomalies on the lattice as well as practical developments for studying theories with a global chiral symmetry, such as QCD, using lattice Monte Carlo methods. However, most of this past work has been done for lattice theories in Euclidean spacetime. The recent rapid developments in quantum technologies have necessitated similar developments in the Hamiltonian formulation, which is a more natural setup for quantum computing. In this talk, we review a formulation of Hamiltonian overlap fermions and describe how one can systematically improve its chiral properties. This sheds light on how the anomalous chiral symmetry manifests in a Hamiltonian Ginsparg-Wilson formulation and may lead to improvements in quantum algorithms for studying chiral fermions.

See you on Monday.

Best regards,

Joe, Zheng-Yang, and Gloria
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