Comments about "Threshold theorem" in Wikipedia

This document contains comments about the article Threshold theorem in Wikipedia
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Introduction

In quantum computing, the threshold theorem (or quantum fault-tolerance theorem) states that a quantum computer with a physical error rate below a certain threshold can, through application of quantum error correction schemes, suppress the logical error rate to arbitrarily low levels.
The word can is very critical. What you need is that the number of errors is zero, including error correcting. If there are errors you calculation is wrong. In a PC the number of errors is actual zero. You cannot prove with mathematics that a quantum computer does not show any errors, because a quantum computer is a physical process. You can only demonstrate that by building a Quantum computer. The same with any digital computer or analog computer.

1. Explanation

2. Threshold value in practice

3. See also

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Created: 4 November 2023

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