The Jiuzhang 4.0 can manipulate and detect 3,050 photons at once, which is 10 times more than its predecessor. Jiuzhang 4.0, China’s latest photonic quantum computer, is staking a claim to quantum supremacy. The photonic supercomputer completed a complex calculation in microseconds, which the world’s fastest supercomputer would take 10^42 years to complete. Often referred to as the next frontier of computing, quantum computers are being sought to complete calculations that are impossible for classical computers. Scientists hope that quantum computers will help us solve problems like climate change and accelerate drug discovery. At the core of quantum computing are...