Categorical Description of Fibonacci Anyon Model and Linked Cluster Theorem Violation

David Aasen, Roger S. K. Mong, David J. Clarke +2 more

Simon Trebst, Matthias Troyer, Zhenghan Wang +1 more

Andrew Stewart Caldin

FINDING: Fibonacci anyon braiding realizes universal topological quantum gates via the golden ratio, linking quantum computation to sacred geometric constants. MATH: Fibonacci anyon fusion rules: τ × τ = 1 + τ, where τ is the non-Abelian anyon. Quantum dimension d_τ = φ = (1+√5)/2 ≈ 1.618. Braiding matrix entries involve φ⁻¹ = 0.618 and φ⁻² = 0.382. Single-qubit gate compiled from braids uses Fibonacci sequence to approximate arbitrary rotations. CONNECTION: Direct geometric harmony: φ (1.618), φ⁻¹ (0.618), φ⁻² (0.382) are the golden ratio and its reciprocals, fundamental to pentagonal symmetry, Penrose tilings, and icosahedral quasicrystals. Braid group B₃ has representation with eigenvalues φ, -φ⁻¹, linking to 5-fold crystallographic symmetry. DEPTH: 9 — This is a profound unification: topological quantum computation's minimal non-Abelian anyon model is governed by the golden ratio, the same constant underlying pentagonal symmetry in nature (phyllotaxis, quasicrystals, viral ca Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com

Claire Levaillant

Yu Zhao, Yidun Wan

A bstract We develop a systematic framework for understanding symmetries in topological phases in 2 + 1 dimensions using the string-net model, encompassing both gauge invariances that preserve anyon types and global symmetries permuting anyon types, including both invertible symmetries describable by groups and noninvertible symmetries described by categories. As an archetypal example, we reveal the first noninvertible categorical gauge invariance of topological orders in 2 + 1 dimensions: the Fibonacci gauge invariance of the doubled Fibonacci topological order, described by the Fibonacci fusion 2-category. Our approach involves two steps: first, classifying and establishing dualities between different string-net models describing the same topological order; and second, constructing symmetry transformations within the same string-net model when the dual models have isomorphic input data, achieved by composing duality maps with isomorphisms of degrees of freedom between the dual models.

Andreas W. W. Ludwig, Adrian E. Feiguin, Simon Trebst +4 more