TECH

Hanyuan-2: the Chinese Quantum project hat could reduce one of computing's biggest problems
A new quantum machine developed in China has brought an unexpected combination of unprecedented architecture, lower operational complexity, and an approach that could alter the course of advanced computing.
The technological dispute between China and the United States has long since ceased to involve only chips, artificial intelligence, or satellites. Now, a new frontier is quietly gaining strength: quantum computers. And it was precisely in this scenario that a Chinese company presented a system that attracted attention not only for its power, but mainly for the completely different way it was built. The project opens up an uncomfortable question in the sector: will the next great quantum revolution come from a path that the West did not expect?
The new system was developed by CAS Cold Atom Technology, a company based in Wuhan specializing in quantum technologies, and was named Hanyuan-2.
At first glance, the number of cubits is already impressive. The machine works with 200 cubits divided into two independent matrices of 100 units each. But what really differentiates the project is not just the quantity.
The computer uses two separate sets of rubidium atoms, organized in distinct structures that can operate simultaneously or assume different functions within quantum processing. In certain tasks, one matrix acts as the main computational core, while the other functions as support to stabilize more delicate operations.
This approach creates a kind of "quantum dual brain," something unprecedented in this technological segment. And the most important detail appears precisely there.
Current quantum computers face a gigantic problem: cubits are extremely unstable. Small external interferences can generate errors capable of compromising entire calculations. Therefore, one of the industry's biggest obsessions is finding ways to create more reliable logical cubits.
Logical cubits function as protected versions of traditional physical cubits. Instead of relying on a single vulnerable unit, the system distributes information across multiple cubits simultaneously, allowing it to detect and correct faults.
For years, this seemed unfeasible on a large scale because it required an absurd number of physical cubits to generate just a few stable logical cubits.
Now, the architecture presented by Hanyuan-2 suggests that this barrier may begin to diminish.
The most surprising detail: it doesn't need extreme temperatures. There is another aspect of the project that has attracted even more attention within the quantum industry.
The new computer does not depend on extreme cryogenic cooling...Today, the world's best-known quantum systems — including those developed by giants like IBM and Google — need to operate at temperatures close to absolute zero. This requires extremely expensive structures, enormous cooling systems, and highly controlled environments.
Hanyuan-2 follows a completely different path. Instead of using ultra-frozen superconducting cubits, it uses neutral atoms controlled by lasers. The entire system operates with relatively low energy consumption and without the need for liquid nitrogen or gigantic cryogenic facilities.
In practice, this means something potentially revolutionary: quantum computers that are much easier to install and operate outside of specialized laboratories.
Experts see this approach as one of the most promising routes to making quantum computing more scalable in the future. And this helps explain why neutral atoms have started to gain so much ground in recent years.
How the dual-core architecture works...Each core of the Hanyuan-2 operates as a complete and autonomous quantum processor.
The company claims that the two can work in parallel, sharing computational loads like a traditional CPU, or in "main and auxiliary" mode, in which one array performs the calculation while the other performs real-time error correction.
Ge Guiguo, senior specialist at CAS Cold Atom Technology, told the Science and Technology Daily that this is the first time a quantum processor has migrated from a single-core to a dual-core design, a deliberate comparison to the evolution of classical CPUs.
"For the first time in the world, a quantum processor has advanced from a single-core to a dual-core architecture, marking a significant advance in quantum computing design"...Ge Guiguo, according to the Science and Technology Daily interview replicated by the Global Times.
The proposal of two cooperating arrays within a machine is more reminiscent of modular quantum computing than the multi-core approach of classical processors.
IBM and Atom Computing already work with architectures based on processor interconnection, while QuEra and Pasqal scale single arrays with connectivity between modules.
Neutral atoms and consumption below 7 kW...The Hanyuan-2 platform captures neutral atoms with laser beams, a technique that avoids the near-absolute zero cooling required by superconducting processors like those from IBM and Google.
Because they have no electrical charge, atoms can be within a few micrometers of each other in optical traps and still be manipulated as qubits. Tang Biao, general manager of CAS Cold Atom Technology, described the equipment as a compact cabinet with a small laser cooling system and total consumption of less than 7 kW.
For comparison, superconducting quantum processors typically require dilution coolers that maintain temperatures close to 15 millikelvin, with power consumption that can exceed tens of kilowatts in the cryogenic stage alone.
The energy advantage of neutral atoms is the main technical argument repeatedly made by CAS Cold Atom Technology.
The quantum race between China and the United States enters a new phase...Until recently, most Chinese advances in quantum computing were linked to superconducting cubits, a technology similar to that used by American companies. But the Hanyuan-2 shows that China is also advancing rapidly on another front considered extremely strategic.
The development is happening in parallel with the Chinese effort to reduce external technological dependencies, especially in critical components linked to quantum infrastructure and advanced connectivity systems.
More than just a new computer, the launch symbolizes something bigger.
It shows that different countries have begun to pursue completely distinct technological paths to achieve so-called quantum supremacy.
And perhaps that's the most interesting part of the whole story. The quantum race no longer seems like a competition to build only more powerful machines.
Now, it has also become a competition to discover which architecture will be able to survive in the real world.
mundophone
