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

USTC researchers unveiled Jiuzhang 4, a new photonic quantum prototype using 1,024 squeezed-vacuum inputs across 8,176 optical modes.

The system reportedly solves Gaussian boson sampling tasks far faster than classical machines, including the El Capitan supercomputer.

The work, published in Nature, relies on low-loss optical design to reduce photon loss and scale up the experiment.

It strengthens China’s case for leading in quantum advantage demonstrations, though the result is for a narrow benchmark, not general-purpose computing.