Engineering superconducting qubit arrays for Quantum Supremacy

Using qubits to perform a classically intractable computation is a key milestone in quantum computing, and is known as “Quantum Supremacy”. I will outline our experiment to achieve this where moderate-depth pseudo-random circuits are programmed to entangle an array of qubits, and the sampled output distribution is benchmarked against a classical simulation. A system larger than 50 qubits with low errors can no longer be checked, as the exponentially scaling Hilbert space becomes too large for state-of-the-art supercomputers. I will describe our experimental progress towards building and operating a sufficiently large 2D array of nearest-neighbor coupled Xmon transmon qubits with fidelities needed for “Quantum Supremacy.”