Quantum technologies—and quantum computers in particular—have the potential to shape the development of technology in the future. Scientists believe that quantum computers will help them solve problems that even the fastest supercomputers are unable to handle yet. Large international IT companies and countries like the United States and China have been making significant investments in the development of this technology. But because quantum computers are based on different laws of physics than conventional computers, laptops, and smartphones, they are more susceptible to malfunction.
An interdisciplinary research team led by Professor Jens Eisert, a physicist at Freie Universität Berlin, has now found ways of testing the quality of quantum computers. Their study on the subject was recently published in the scientific journal. These scientific quality control tests incorporate methods from physics, computer science, and mathematics.
But quantum computers have one major weakness:"They are hyper sensitive when it comes to sources of interference. If a quantum computer is not sufficiently shielded from its environment, then the properties responsible for its computational power disappear. The 'quantum advantages,' as we call them, tend to dissipate. In other words, it just won't work," he adds.
These data provide a whole host of diagnostic information that can be used, for example, to find out how well quantum gates work, if there are any interference factors, or whether certain parts interact with each other unintentionally.
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