Coherent control of a hybrid superconducting circuit made with van der Waals heterostructures*

In this talk, we present the demonstration of a superconducting transmon qubit realized using a graphene-based weak-link junction. The graphene is encapsulated by hexagonal Boron Nitride (hBN), forming a van der Waals heterostructure. Applying a voltage to a backgate in proximity to the weak-link junction enables voltage tunability of the qubit frequency. We present the coherent control of this qubit, and discuss the promise and the challenges if building superconducting qubits with such van der Waals heterostructures.