Quantum processor achieves record accuracy and stability

Quantum computing has taken a major step forward recently with IBM's new Heron processor. The main obstacle to the development of this technology has always been errors, which occur when quantum bits, or qubits, lose their information due to external disturbances. But the IBM team has now demonstrated that their system can operate with a record low error rate, allowing it to run longer and, above all, more complex algorithms.

The Heron processor has achieved a level of precision for two-qubit operations that surpasses all previous records for processors of this size. This means that calculations are correct 99.9 percent of the time, a key threshold for the transition to the era of “quantum exploitation,” where machines can run useful scientific simulations. The team has also managed to extend the coherence time, which in practice means that the processor can perform more consecutive operations before the quantum state collapses.

One of the biggest challenges in building larger quantum computers is so-called “crosstalk,” where an operation on one qubit inadvertently affects another. IBM’s new Heron architecture uses advanced isolation techniques to drastically reduce this noise. This allows researchers to connect multiple processors into a network without sacrificing the accuracy of individual components.

The results, published in the journal Nature, show that Heron can already solve some problems in so-called condensed matter physics that are extremely difficult for conventional computers. Although we have not yet achieved complete fault tolerance, IBM's achievement confirms that their strategy of modularly connecting quantum chips is the right path to a practical quantum computer. In the future, it will be able to simulate new materials or optimize complex logistics processes.