Exact quantum circuits for a Heisenberg triangle with Dzyaloshinskii-Moriya interaction
The paper constructs exact quantum circuits for a three-spin triangle with Dzyaloshinskii–Moriya (DM) interaction, which combines isotropic exchange and DM coupling. By using basis changes, they showed pure DM evolution can be achieved with few gates. These exact circuits reproduce the full evolution operator at any time without increasing gate count, offering a way to simulate larger systems more efficiently.