Andreev Interferometers based on Quantum Point Contacts*

Two dimensional systems proximitized with superconductors have been demonstrated to serve as versatile platform for studying Andreev physics. Here, we create several superconducting interferometers involving two planar Josephson junctions. We probe the limits of balancing such a circuit – that is minimizing the difference of their respective Andreev energies – in addition to demonstrating a dynamic and reversible superconducting diode effect. We compare these results to a simple model that highlights the contribution from high channel transparencies as well as its impact on the higher Josephson harmonics.