Jet: Fast quantum circuit simulations with parallel task-based tensor-network contraction

We introduce a new open-source software library Jet, which uses task-based parallelism to obtain speed-ups in classical tensor-network simulations of quantum circuits. These result from i) the increased introduced by mapping simulation framework, ii) novel method reusing shared work between contraction tasks, and iii) concurrent tensor networks on all available hardware. demonstrate advantages our benchmarking code several Sycamore-53 Gaussian boson sampling (GBS) supremacy circuits against other simulators. also provide compare theoretical performance estimates for GBS first time.