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Quantum Random Walks Hit Exponentially Faster

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abstract

We show that the hitting time of the discrete time quantum random walk on the n-bit hypercube from one corner to its opposite is polynomial in n. This gives the first exponential quantum-classical gap in the hitting time of discrete quantum random walks. We provide the framework for quantum hitting time and give two alternative definitions to set the ground for its study on general graphs. We then give an application to random routing.

fields

quant-ph 1

years

2025 1

verdicts

UNVERDICTED 1

representative citing papers

Lazy Quantum Walks with Native Multiqubit Gates

quant-ph · 2025-11-26 · unverdicted · novelty 4.0

Simulations of small lazy quantum walks on neutral atoms show a fidelity advantage for native multiqubit Rydberg gates over decomposed two-qubit sequences at certain gate-error regimes.

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  • Lazy Quantum Walks with Native Multiqubit Gates quant-ph · 2025-11-26 · unverdicted · none · ref 6 · internal anchor

    Simulations of small lazy quantum walks on neutral atoms show a fidelity advantage for native multiqubit Rydberg gates over decomposed two-qubit sequences at certain gate-error regimes.