The processor has supported up to 72 qubits, forming a matrix with each other, and the error rate for data reading and logic operations is already quite low.
If we can control the error rate of the quantum processor at a sufficiently low level, we can surpass the traditional silicon computer and solve the so-called quantum supremacy when solving a clear computational problem.
To achieve this goal, we need a 49-qubit quantum processor with a circuit depth of more than 40 and a double qubit error rate of less than 0.5%.
Although no one has yet reached this point, the 72 qubits of the Google Bristlecone processor have crossed a threshold, and Google is cautiously optimistic that it is indeed capable of quantum hegemony.
But Google also acknowledged that quantum computers still need to iterate several times in order to surpass the current silicon computer.
Google said that the Bristlecone processor can be used as a test platform to study quantum system error rate, qubit technology scalability, and quantum simulation optimization, machine learning.
Earlier this year, Intel had released a 49-qubit processor that was considered a milestone.