Threshold Estimate for Fault Tolerant Quantum Computing
نویسنده
چکیده
I make a rough estimate of the accuracy threshold for fault tolerant quantum computing with concatenated codes. First I consider only gate errors and use the depolarizing channel error model. I will follow P.Shor [1] for fault tolerant error correction (FTEC) and the fault tolerant implementation of elementary operations on states encoded by the 7-qubit code. A simple computer simulation suggests a threshold for gate errors of the order ǫ ≈ 10 or better. I also give a simple argument that the threshold for memory errors is about 10 times smaller, thus ǫ ≈ 10.
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