Variational quantum algorithm to find the ground state of Schwinger model (a U(1) lattice gauge theory) using two different ansatzes and comparison with exact diagonalization. The theory is based on: https://arxiv.org/abs/1612.08653.pdf
The two ansatzes are taken from the papers:
- Resource Hamiltonian -- https://arxiv.org/abs/1810.03421.pdf
- MBVQE -- https://arxiv.org/abs/2010.13940.pdf