Researchers at the University of Regensburg and their international partners have found a way to significantly reduce errors in quantum bits. In an experiment, they demonstrated that a single additional measurement before a series of quantum operations can cut the error rate by more than half. The results have been published in Applied Physics Reviews.
Quantum computers are widely regarded as a promising technology for solving problems beyond the reach of today's computers. One of their main challenges, however, is that their fundamental building blocks, known as quantum bits, are extremely sensitive to disturbances.
A quantum bit, usually shortened to qubit, is the basic unit of information in a quantum computer and plays a role similar to that of a bit in a conventional computer. While classical bits store information as either 0 or 1, qubits are realized by physical systems governed by the laws of quantum mechanics. In this study, the qubit consisted of a tiny superconducting electrical circuit on a chip that was controlled using microwave signals.
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