Breakthrough in quantum computing: logical qubit survival rate reaches 96% on IBM Heron processor
An important step has been taken toward creating fault-tolerant quantum computers. A joint group of researchers from the University of Sydney and IBM has introduced a new error correction mechanism that has increased the preservation of logical qubits to 96% on the IBM Quantum Heron r2 processor. This is a significant achievement, given that the previous rate did not exceed 90%.
The Problem of "Idle Noise"
The main obstacle to the stable operation of quantum systems is the so-called "idle noise." In modern devices, intermediate measurements of qubits must be regularly performed to correct errors. However, during these pauses, the remaining components of the processor lose stability, generating new failures. This effect is amplified at each stage of computation, making the system unreliable.
New Architecture of Correction Circuits
To solve this problem, physicists completely redesigned the architecture of error correction circuits. The main goal was to radically reduce the time computation stops. 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 correction cycle was raised from less than 90% to 96%.
Project leader Stephen Bartlett emphasized that forced idle time of components becomes a "serious obstacle" to reliable operation. Although the result was obtained in laboratory conditions on a single processor, such research is critically important for the entire industry. Scalability and fault tolerance remain the main barriers to the practical use of quantum computers.
Let me remind you that IBM has already planned to achieve the first confirmed cases of quantum advantage by the end of 2026. Achieving a 96% survival rate of logical qubits is not just a laboratory success, but a real step toward making quantum computing stable and commercially viable. From my point of view, this is one of the most significant results in the field of error correction in recent years, bringing us closer to the era of practical quantum computing.