Gauge Theories, Constrained Hamiltonians and Digital Quantum Computers

by Dr Dorota Maria Grabowska (University of Washington (US))

Thursday 25 May 2023, 10:00 → 11:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Constrained Hamiltonians are ubiquitous in fundamental physics, as any gauge theory – general relativity, electromagnetism, Yang–Mills, string theory – all result in such Hamiltonians. Unfortunately, implementing these Hamiltonians on digital quantum computers poses a number of difficulties, both theoretical and practical. In this talk, I will discuss our recent work on implementing 2+1 dimensional U(1) gauge theories onto quantum hardware. While this theory is not phenomenologically relevant to Standard Model physics, it is a fantastic toy model for non-Abelian gauge theories in higher dimensions. In particular, I will discuss the ways this theory demonstrates the many pitfalls of carrying out simulations of gauge theories in a resource-efficient manner.

CERN QTI.pdf