Google Achieves Breakthrough in Quantum Error Correction with 101-Qubit Surface Code, d=5 Surface Codes Excel

Aug 27, 2024, 01:34 AM

Google Quantum AI has achieved a significant breakthrough in quantum error correction by implementing a 101-qubit surface code, which is below the surface code threshold. This advancement demonstrates that a logical qubit composed of 101 physical qubits can last 2.4 times longer than the best physical qubit. The research highlights that increasing the distance in the quantum code results in a substantial reduction in the logical error rate, with d=5 surface codes being twice as good as d=3, effectively doubling the performance with each increment.