Science, Space and Technology News 2024
Researchers have developed a new error-correction system for quantum computers, using qLDPC codes and reconfigurable atom arrays to reduce the physical qubit requirements, enhancing scalability and efficiency. Credit: SciTechDaily.com
“With this proposed blueprint, we’ve reduced the overhead required for quantum error correction, which opens new avenues for scaling up quantum computers,” said Liang Jiang, professor of molecular engineering and senior author of the new work, published inWhile standard computers rely on digital bits — in an on or off position — to encode data, qubits can exist in states of superposition, giving them the ability to tackle new computational problems.
“The problem with this is that you need a huge resource overhead,” said Xu. “In some of these systems, you need one thousand physical qubits for every logical qubit, so in the long run we don’t think we can scale this up to very large computers.”In their new system, Jiang, Xu, and colleagues at Harvard University, Caltech, University of Arizona, and QuEra Computing aimed to instead use qLDPC codes to correct errors.
“With today’s reconfigurable atom array systems, we can control and manipulate more than a thousand physical qubits with high fidelity and connect qubits separated by a large distance,” said Harry Zhou of Harvard University and QuEra Computing. “By matching the structure of quantum codes and these hardware capabilities, we can implement these more advanced qLDPC codes with only a few control lines, putting the realization of them within reach with today’s experimental systems.
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