Year: 2026
Type: preprint
Abstract: We present the first analytical determination of the exact accessible dimension for every fixed architecture of arbitrary two-qubit gates on three qubits. Every reduced six-slot support word is locally universal, including the alternating nearest-neighbor line. Thus, any obstruction to global universality with six two-qubit gates must go beyond parameter counting, connectivity, and differential rank.
Source: arXiv (Cornell University)
Author: Cha, HyunHo
Institution: Seoul National University
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7204919197
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