(SciTechDaily) A new test to check if a quantum computer is giving correct answers to questions beyond the scope of traditional computing could help the first quantum computer that can outperform a classical computer to be realized.
By creating a protocol that allows a quantum computer to check its own answers to difficult problems, the scientists from the University of Warwick have provided a means to confirm that a quantum computer is working correctly without excessive use of resources.
The researchers have developed a protocol to quantify the effects of noise on the outputs of quantum computers. Noise is defined as anything that affects a quantum machine’s hardware but is beyond the user’s control, such as fluctuations in temperature or flaws in the fabrication. This can affect the accuracy of a quantum computer’s results.

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