Universal representation of the long-range entanglement in the family of Toric Code states

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Authors: Mohammad Hossein Zarei, Mohsen Rahmani Haghighi
Cited by: 0

Abstract

Abstract Toric Code, a cornerstone of the topological order, admits numerous realizations on different planar graphs. We prove that all these realizations share a single, universal entanglement structure in a sense that any Toric Code state can be generated by applying a fixed set of non-local unitaries between similar quasi-one-dimensional quantum ladders. In particular, we consider Toric Code states corresponding to various planar graphs and apply non-local dientanglers to qubits corresponding to non-contractible cycles that satisfy a topological constraint. We demonstrate that, independent of the geometry of the underlying graph, disentanglers convert Toric Code states into a tensor product of Kitaev's Ladder states. This exact and graph-independent construction reveals that the long-range entanglement characterizing the Toric Code's topological phase has a precise decomposable structure in a sense that it arises entirely from a specific pattern of entanglement between lower-dimensional subsystems. This structural insight opens new avenues for classification and simulation of topological orders.

Fields of Study & Subjects

Quantum many-body systems Topological Materials and Phenomena Quantum Information and Cryptography

Publication details

Journal / source
Europhysics Letters (EPL)
Volume
155
Issue
5
Pages
58001–58001
Publication date
29 June 2026
Language
EN