IBM's Quantum Computer Smashes Classical Counterpart with Record-Breaking Performance

IBM's commercial quantum computer has achieved a significant milestone in the 'quantum advantage' arms race, processing one million samples in just 19 seconds. This feat is estimated to be equivalent to around 110 years of computing time for a classical supercomputer.

The experiment was conducted using IBM's Nighthawk r2 processor, which consists of 120 qubits and is commercially accessible through the company's cloud platform. Researchers selected 61 qubits and subjected them to random circuits of increasing complexity, up to 40 cycles, and found that the optimal performance occurred at 36 cycles.

The team used a technique called tensor-network contraction to estimate the computational cost of simulating the quantum circuit on a classical computer, finding that it would require around 1.2 × 10²⁷ operations. This is significantly more than the peak performance of the world's fastest supercomputer at the time, Frontier.

The results demonstrate that quantum computers can outperform classical computers for certain tasks and have been made publicly available on arXiv, allowing others to test and replicate the findings.