Author

T. Mooney

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Preprint Aug 2026

Fast GHZ encoding with $1-o(1)$ fidelity

We prove that $(1-o(1))$-fidelity $N$-qubit Greenberger--Horne--Zeilinger (GHZ) encoding can be performed in time $O(\log N/N)$ using all-to-all 2-local Hamiltonians with bounded 2-qubit interaction terms. This saturates the theoretical lower bound $\Omega(\log N/N)$, and by rescaling, also saturates the lower bound on...

Laura Shou, T. Mooney, Twesh Upadhyaya et al. · 1 citation