Symmetry-Protected Quantum Computing using Metamaterials

Abstract

We propose a new architecture for practical quantum computing that combines three established principles: symmetry protection of relative-motion qubits via the generalized Kohn theorem, control via twisted-light orbital angular momentum, and metamaterial nanofocusing (e.g. using Weyl-semimetal plasmonics). Crucially, the core mechanism is generic: it applies to any current or future quantum computing system involving parabolic confinement, including cold atoms, ions, and semiconductor dots.

Invited talk at META (International conference on Metamaterials, Photonic Crystals and Plasmonics), Dublin, July 14-17, 2026