Quantum computing: logical qubit survival rate reaches 96% on IBM Heron processor
A group of researchers, in collaboration with IBM, has achieved significant progress in the field of quantum computing, increasing the survival rate of logical qubits to 96% on the latest IBM Heron r2 processor. This was made possible by developing an innovative error correction mechanism that addresses one of the key challenges of modern quantum systems.
The main obstacle to creating reliable quantum computers capable of operating in fault-tolerant computing (FTQC) mode is the so-called "idle noise." This effect occurs during moments when the system performs intermediate measurements of qubits to correct errors, leading to instability in other processor components and the emergence of new faults.
A New Approach to Error Correction Circuit Architecture
To overcome this problem, physicists completely redesigned the architecture of error correction circuits, radically reducing computation downtime. The new method was tested on the advanced 156-qubit superconducting quantum processor IBM Quantum Heron r2. Thanks to algorithm optimization, the survival rate of logical qubits per error correction cycle was raised from less than 90% to an impressive 96%.
As noted by project leader and Sydney Nano director Stephen Bartlett, this process occurs repeatedly at each stage of computation, and the forced idle time of other elements becomes a serious obstacle to reliable operation. Although the result was achieved in laboratory conditions on a single processor, research in this direction is critically important for the entire industry, as scalability and fault tolerance remain the main barriers to the practical application of quantum computing.
It is worth noting that IBM has already advanced in quantum error correction and plans to achieve the first confirmed cases of quantum advantage by the end of 2026. This breakthrough brings us closer to this goal, demonstrating that the technology is gradually moving from the laboratory stage into real-world practice.
Expert opinion: Achieving a 96% survival rate for logical qubits is a significant step forward, but for full-fledged fault-tolerant computing, we will need a figure close to 99.99%. Nevertheless, each such advance brings us closer to the era of practical quantum computers capable of solving problems inaccessible to classical systems.