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University of Innsbruck: Quantum cloud computing with a self-test

quantum experiment © IQOQI Innsbruck / Harald Ritsch

The research group led by Rainer Blatt and Peter Zoller reported about how they simulated phenomena in particle physics with up to 20 quantum bits and how the quantum simulator verified the results by itself for the first time in the scientific journal Nature. At present, many scientists are dealing with the question of how "quantum superiority" can be used on hardware which is already available today.

Three years ago, physicists at the University of Innsbruck simulated the spontaneous creation of a pair of elementary particles with a digital quantum computer. However, many quantum bits which are not yet available in today's quantum computers were necessary for complex simulations due to the error rate. The analogue replication of quantum systems in a quantum computer are also subject to strict limits. Based on a new method, researchers led by Christian Kokail, Christine Maier, Rick van Bijnen and Christian Roos at the Institute for Quantum Optics and Quantum Information (IQOQI) of the Austrian Academy of Sciences have now shattered these limits. They use a programmable trapped ion quantum computer with 20 quantum bits as a quantum co-processor, enabling quantum-mechanical calculations exceeding the limits of conventional computers to be outsourced.

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