China's 'Jiuzhang 4' Quantum Computer Achieves 10^54 Speedup Over Supercomputers

USTC researchers unveiled Jiuzhang 4, a programmable photonic quantum prototype with 1,024 squeezed-state inputs and 8,176 modes.

The system can handle up to 3,050 photons and uses improved optical sources and interferometer design to cut photon loss.

Published in Nature, it reportedly achieves a 10^54 speedup over classical supercomputing on Gaussian boson sampling tasks.

The result is a major step forward for low-loss photonic quantum hardware and reinforces China’s lead in quantum advantage demonstrations.