Quantum simulation of the Schwinger model with a topological term

by Dr Lento Nagano (The University of Tokyo)

Tuesday 18 Jul 2023, 22:00 → 23:00 Europe/Berlin

Zoom

In this talk, I will explain applications of quantum algorithms to the 1+1d gauge theory, known as the Schwinger model.

The Schwinger model is a good benchmark model, since some analytic results are available in a certain parameter region, while it exhibits nontrivial phenomena, such as confinement.

In particular, we can include a topological term in the Lagrangian, which cannot be treated by the conventional Monte-Carlo method and allows us to investigate the effects of probe charges and an external electric field.

In this way, we study the following two examples; potential energy in the presence of two probe charges via adiabatic state preparation and real-time evolution in the presence of the external field via variational quantum algorithms.

For both cases, we test our protocols using the classical simulator and observe a nice agreement with exact diagonalization.

 

Zoom-Meeting
https://desy.zoom.us/j/62137287810?pwd=SlU3NlpqbTFObXlhbjN4Rm9tcE95dz09

Meeting-ID: 621 3728 7810
Code: 146526