Enlarge / Two generations of Google’s Sycamore processor.Google Quantum AI
Today, Google announced a demonstration of quantum error correction on its next generation of quantum processors, Sycamore. The iteration on Sycamore isn’t dramatic—it’s the same number of qubits, just with better performance. And getting quantum error correction isn’t really the news—they’d managed to get it to work a couple of years ago.
Instead, the signs of progress are a bit more subtle. In earlier generations of processors, qubits were error-prone enough that adding more of them to an error-correction scheme caused problems that were larger than the gain in corrections.
→ Continue reading at Ars Technica