In a series of experiments performed at UW-Madison, the research team characterized a quantum testbed device, finding that fluctuations in the electrical charge of multiple quantum bits, or “qubits” - the basic unit of a quantum computer - can be highly correlated, as opposed to completely random and independent. The results will likely impact future quantum system architecture, such as putting quantum computers behind lead shielding or underground, introducing heatsinks or dampers to quickly absorb energy and isolate qubits, and alter the types of materials used in quantum systems. Other co-authors included researchers at the University of Wisconsin-Madison, Fermi National Accelerator Laboratory, Google, Stanford University and international universities.ĭuBois said the team’s findings had never been experimentally proven in a multi-qubit device before. This must be understood in order to build a functioning quantum system. In a new paper published in Nature and co-authored by LLNL physicist Jonathan DuBois, scientists examined quantum computing stability, particularly what causes errors and how quantum circuits react to them. RESEARCH INSTITUTION NEWS: Research by a Lawrence Livermore National Laboratory (LLNL) physicist and a host of collaborators is shedding new light on one of the major challenges to realizing the promise and potential of quantum computing - error correction. The team also linked tiny error-causing perturbations in the qubits’ charge state to the absorption of cosmic rays. In experiments performed at the University of Wisconsin-Madison, researchers found that fluctuations in the electrical charge of multiple quantum bits, or “qubits,” can be highly correlated, as opposed to completely random and independent.
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