From the paper ... > With the current rate of progress in quantum computing technologies, 50-qubit systems will soon become a reality. To assess, refine and ad

From the paper ... > With the current rate of progress in quantum computing technologies, 50-qubit systems will soon become a reality. To assess, refine and advance the design and control of these devices, one needs a means to test and evaluate their fidelity. https://arxiv.org/abs/1710.05867 https://arxiv.org/abs/1710.05867 It is for testing new quantum computers. We can now use classical computers to simulate larger ( > 49-qubit ) quantum computers. Previously ... > Such calculations were previously thought to be impossible due to impracticable memory requirements.