CAS Cold Atom Unveils 200-Qubit Hanyuan-2 Quantum Computer as Dual Cores Target Error Reduction
Updated
Updated · Livescience.com · Jun 9
CAS Cold Atom Unveils 200-Qubit Hanyuan-2 Quantum Computer as Dual Cores Target Error Reduction
3 articles · Updated · Livescience.com · Jun 9
Summary
Hanyuan-2 combines two independently controllable neutral-atom arrays into a 200-qubit machine—100 rubidium-87 atoms and 100 rubidium-85 atoms—that can run in parallel or pair a main core with an auxiliary core.
CAS Cold Atom says that dual-core design tackles single-core bottlenecks by separating tasks and letting the arrays support error correction, aiming to improve stability, efficiency and scalability.
More than 500 optical tweezers, a reported 100-second qubit lifetime and power use below 7 kilowatts are meant to let the rack-mounted system operate without the cryogenic infrastructure used by superconducting quantum computers.
Key performance details remain unclear: the company did not disclose benchmark results such as error rates, and it is unknown whether qubits can be entangled across the two cores—critical to judging whether it functions as a true 200-qubit system.
Is China's 'dual-core' quantum computer a true breakthrough, or clever marketing for two separate machines?
As China controls critical quantum minerals, is the West's technological lead built on a fragile supply chain?
China’s Hanyuan-2 200-Qubit Dual-Core Quantum Computer: Breakthrough or Hype?
Overview
In early 2026, CAS Cold Atom Technology unveiled the Hanyuan-2 atomic quantum computer, introducing a novel 'dual-core' architecture that integrates two complete neutral atom arrays—one with rubidium-85 and one with rubidium-87—within a single cabinet-scale machine. This design allows the arrays to work independently or together, aiming to overcome challenges like qubit interference and stability found in single-array systems. Notably, Hanyuan-2 operates without the need for ultra-low temperature cooling, making it more practical for deployment. However, the lack of published performance benchmarks has led to skepticism about its true capabilities and impact.