aiqbench takeQuantum Computing

This research presents a significant efficiency gain for quantum read-only memory (QROM) by utilizing dense encoding to store two bits per dirty qubit rather than one. By leveraging both Z and X bases, the new method halves the Toffoli count compared to previous SelectSwap techniques, offering crucial optimization for qubit-constrained systems.

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Quantum memory gets a boost from encoding data more efficiently

Quantum ZeitgeistOctober 19, 20263 min read

Quantum read only memory (QROM) efficiency improves with a new dense encoding construction, reducing Toffoli count to N/λ—a 2x boost over SelectSwap.

Danial Motlagh of has developed a new method for quantum read only memory (QROM) that halves its computational cost. The work introduces a dense encoding construction of QROM, where two bits of classical information are stored in each dirty qubit by using both the Z and X bases. On its own, dense encoding provides a 2× improvement over SelectSwap by reducing the leading Toffoli count to…

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