Quantum and tensor network simulation of an abelian lattice field theory

Paolo Stornati (ICFO – Institute of Photonic Sciences, Castelldefels)

Abstract:

 In recent years, quantum simulators have emerged as a promising pathway to circumvent various problems in quantum field theory simulations. In this talk, I will present recent results of the study of a qubit-regularized U(1) lattice gauge theory in 2+1 spacetime dimensions, including the presence of a chemical potential for non-local winding excitations corresponding to integer-valued electric flux in either spatial direction. After an introduction to the qubit formulation given by the quantum link model, I will introduce basic concepts of tensor network (and more precisely DMRG) simulations. The results I will show are yet another motivation for keep on improving quantum simulator, as they are a potential candidate for non-perturbative quantum simulation of models that cannot be simulated with the state-of-the-art Monte Carlo techniques, e.g. where sign problem is present.

This will be an online meeting. For the Zoom link please contact Simone Romiti (romiti@hiskp.uni-bonn.de) 

Seminar Room II, HISKP (3.013)

 

---