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Milestone Achieved in New Quantum Computing Architecture


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Artistic rendering shows two qubits with long coherence time and strong coupling.

The team has not yet fully optimized their electron qubit and will continue to work on extending its coherence time even further, as well as entangling two or more qubits.

Credit: Dafei Jin/Argonne National Laboratory, University of Notre Dame

Scientists at the U.S. Department of Energy's Argonne National Laboratory and Stanford University have extended the coherence time for a unique class of quantum bit (qubit) to 0.1 milliseconds, topping the previous record by nearly 1,000-fold.

A single electron trapped on an ultraclean solid-neon surface within a vacuum forms the qubit; the neon ensures a long coherence time by protecting against environmental interference.

Argonne's Dafei Jin said, "Rather than 10 to 100 operations over the coherence times of conventional electron-charge qubits, our qubits can perform 10,000 with very high precision and speed."

The researchers made the qubit sufficiently scalable to link with other qubits, demonstrating that two-electron qubits can pair to the same superconducting circuit to enable information transfer.

From Argonne National Laboratory
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Abstracts Copyright © 2023 SmithBucklin, Washington, D.C., USA


 

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