paper

Universal quantum computing using symmetry-protected topologically ordered states

arXiv:1711.00094 · doi:10.1103/PhysRevA.97.022305

Abstract

Measurement-based quantum computation describes a scheme where entanglement of resource states is utilized to simulate arbitrary quantum gates via local measurements. Recent works suggest that symmetry-protected topologically non-trivial, short-ranged entanged states are promising candidates for such a resource. Miller and Miyake [NPJ Quantum Information 2, 16036 (2016)] recently constructed a particular symmetry-protected topological state on the Union-Jack lattice and established its quantum computational universality. However, they suggested that the same construction on the triangular lattice might not lead to a universal resource. Instead of qubits, we generalize the construction to qudits and show that the resulting qudit nontrivial symmetry-protected topological states are universal on the triangular lattice, for being a prime number greater than 2. The same construction also holds for other 3-colorable lattices, including the Union-Jack lattice.

22 pages, 23 figures

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