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Xanadu's new algorithmic techniques for Quantum Read-Only Memory (QROM) significantly lower the non-Clifford gate costs required to load classical data, directly reducing hardware runtime and qubit overhead. By combining sequential bit packing with dense encoding in multiple Pauli bases, this approach achieves nearly a four-fold reduction in Toffoli gates compared to standard benchmarks. This advancement is critical for scaling fault-tolerant quantum algorithms that rely on large lookup tables, such as those used in molecular simulation or financial modeling.
Xanadu Cuts Quantum Read-Only Memory Costs by ~4x via Dense Encoding
Xanadu has achieved a nearly 4-fold reduction in Quantum Read-Only Memory (QROM) costs by developing an algorithmic technique that reduces the non-Clifford gate cost. This was accomplished through two innovations: Sequential Bit Packets and SelectCopy, and Dense Encoding in Z and X Bases. These advancements significantly cut hardware runtimes and qubit requirements for loading classical data into quantum computers. The post Xanadu Cuts Quantum Read-Only Memory Costs by ~4x via Dense Encoding appeared first on Quantum Computing Report.
Toffoli reduction relative to SelectSwap with D = 256 available dirty qubits. In a pair of research papers published on arXiv, Xanadu Lead Quantum Scientist Danial Motlagh and co-author Matthew Pocrnic have demonstrated an algorithmic technique that reduces the non-Clifford gate cost of Quantum Read-Only Memory (QROM) by…
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