Quantum computing is of high interest because it promises to perform at least some kinds of
computations much faster than classical computers. Arute et al. 2019 (informally, “the Google
Quantum Team”) report the results of experiments that purport to demonstrate “quantum
supremacy” – the claim that the performance of some quantum computers is better than that of
classical computers on some problems. Do these results close the debate over quantum
supremacy? We argue that they do not. In the following, we provide an overview of the Google
Quantum Team’s experiments, then identify some open questions in the quest to demonstrate
quantum supremacy