DATE2026.05.14 #Press Releases
Efficient storage and retrieval of quantum operations
Disclaimer: machine translated by DeepL which may contain errors.
Theoretical Proof that Quantum Memory Outperforms Classical Memory
Summary
Professor Murao and her research group focused on a quantum operation called the isometry operation, which represents the encoding of information. By analytically solving the problem of finding the optimal estimation accuracy of isometry operations, it was shown that the estimation of isometry operations has a limit called the standard quantum limit. Comparing this classical limit with existing quantum strategies showed the superiority of quantum strategies.
In particular, we proved that the number of calls to isometry operations can be reduced to the square root by using quantum strategies.
By providing an example of quantum information processing that rigorously proves the superiority of quantum memory, this research is expected to influence guidelines for academic and industrial applications of quantum computers. It is also expected to have relevance to techniques for enhancing confidentiality in quantum computation, since quantum strategies for storing and retrieving quantum operations allow unknown quantum operations to be performed without disclosing their contents.
Comparison of classical and quantum strategies for the storage and retrieval of quantum operations.
Publication Information
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Journal name Physical Review Letters Title of paper Quantum Advantage in Storage and Retrieval of Isometry ChannelsAuthors Satoshi Yoshida, Jisho Miyazaki, Mio Murao DOI 10.1103/fdvq-9m8m