  The 1+1D Ising model is an ideal benchmark for quantum algorithms, as it is
very well understood theoretically. This is true even when expanding the model
to include complex coupling constants. In this work, we implement quantum
algorithms designed for the simulation of open or complex coupling quantum
field theories on IBM devices with a focus on the measurement of the Lee-Yang
edge singularity. This feature corresponds (at large volumes) to a phase
transition, and our successful reproduction of the transition represents a
non-trivial test for current hardware and its ability to distinguish features
of interest in quantum field theories.
