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arxiv: 1210.4626 · v3 · submitted 2012-10-17 · 🪐 quant-ph

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Time-optimal quantum computation

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classification 🪐 quant-ph
keywords quantumcomputationmeasurementclassicalerrorexecutionfault-tolerantgates
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Given any quantum error correcting code permitting universal fault-tolerant quantum computation and transversal measurement of logical X and Z, we describe how to perform time-optimal quantum computation, meaning the execution of an arbitrary Clifford circuit followed by a layer of independent T gates and any necessary feedforward measurement determined corrective S gates all in the time of a single physical measurement. We assume fast classical processing and classical communication, and argue the reasonableness of this assumption. This enables fault-tolerant quantum computation to be performed orders of magnitude faster than previously thought possible, with the execution time independent of the error correction strength.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Magic state cultivation: growing T states as cheap as CNOT gates

    quant-ph 2024-09 unverdicted novelty 7.0

    Magic state cultivation prepares high-fidelity T states with an order of magnitude fewer qubit-rounds than prior distillation methods by gradually growing them within a surface code under depolarizing noise.

  2. Fast measurement of neutral atoms with a multi-atom gate

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    A multi-atom Rydberg gate with N ancillae enables N-fold photon collection for fast neutral-atom measurement, achieving infidelity below 10^{-3} in 6 μs with N=5 in Cs-Rb simulations.

  3. Securing Elliptic Curve Cryptocurrencies against Quantum Vulnerabilities: Resource Estimates and Mitigations

    quant-ph 2026-03 conditional novelty 6.0

    Resource estimates show Shor's algorithm can break 256-bit ECDLP with fewer than 1450 logical qubits and 90 million Toffoli gates on fast-clock quantum hardware, enabling on-spend attacks on cryptocurrency mempools.

  4. Space-Time Tradeoffs of Pauli-Based Computation in Distributed qLDPC Architectures

    quant-ph 2026-05 unverdicted novelty 5.0

    Large qLDPC blocks in distributed quantum computing enable Pauli-based computation to run up to 10x faster than surface codes for optimization algorithms by using spare nodes to bypass serialization bottlenecks.