Phys.org June 14, 2023
The widely accepted solution to noise in quantum computing is the implementation of fault-tolerant quantum circuits, which is out of reach for current processors. A team of researchers in the US (IBM -Yorktown Heights, NY, UC Berkeley) conducted experiments on a noisy 127-qubit processor and demonstrated the measurement of accurate expectation values for circuit volumes at a scale beyond brute-force classical computation. According to the researchers this represents evidence for the utility of quantum computing in a pre-fault-tolerant era. They established the accuracy of the measured expectation values by comparing them with the output of exactly verifiable circuits. In the regime of strong entanglement, the quantum computer provided correct results for which leading classical approximations break down. According to the researchers their experiments demonstrated a foundational tool for the realization of near-term quantum applications… read more. Open Access TECHNICAL ARTICLE
Zero-noise extrapolation with probabilistic error amplification. Credit: Nature volume 618, pages500–505, (2023)Â