Chinese Researchers Achieve Quantum Advantage With Optical Circuit
A team in China claims quantum advantage by performing a calculation 100 trillion times faster than a supercomputer using Gaussian boson sampling. The experiment utilizes a complex optical setup with 100 inputs and outputs to achieve this groundbreaking milestone.
A team of Chinese researchers achieves a major milestone in quantum computing by demonstrating quantum advantage through a technique called Gaussian boson sampling (GBS). Using a complex optical circuit, the team performs a specific calculation 100 trillion times faster than the world's most powerful classical supercomputers. This breakthrough places China alongside the very few nations that have successfully demonstrated this level of quantum computational dominance.
The experiment relies on an intricate optical setup featuring 100 inputs, 100 outputs, 300 beam splitters, and 75 mirrors arranged in a random pattern. Instead of traditional single photons, the system uses single mode squeezed states of light that interact in ways that are incredibly difficult for conventional computers to simulate. Because of their bosonic nature, photons arriving at a beam splitter simultaneously follow the exact same path, creating a computational problem that classical machines simply cannot process efficiently.
While the GBS system completes the complex calculation in just 200 seconds, the researchers estimate that China's fastest supercomputer, Sunway TaihuLight, takes approximately 2.5 billion years to arrive at the same result. Beyond simply proving quantum advantage, researchers Jian-Wei Pan and Chao-Yang Lu suggest that this specific optical approach holds potential for practical, real-world applications in the future.