Takis Angelides

Jan 17, 2025 | nature.com | Takis Angelides |Pranay Naredi |Arianna Crippa |Karl Jansen |Stefan Kuhn |Stefan Kühn | +1 more

AbstractWe explore the first-order phase transition in the lattice Schwinger model in the presence of a topological θ-term by means of the variational quantum eigensolver (VQE). Using two different fermion discretizations, Wilson and staggered fermions, we develop parametric ansatz circuits suitable for both discretizations, and compare their performance by simulating classically an ideal VQE optimization in the absence of noise.