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Topological Quantum Computing Open Quantum Systems Decoherence

Twin Phases: Phase Transitions Without Hidden Symmetry Breaking

arXiv

Authors: Alison Warman, Yuhan Gai, Sakura Schafer-Nameki

Year

2026

Paper ID

68053

Status

Preprint

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~2 min

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Abstract

We introduce the concept of twin phases for a symmetry mathcal{S}, defined as inequivalent phases, whose order parameters are part of the same generalized charge under mathcal{S}. Stable, direct transitions between such twin phases are never spontaneous-symmetry-breaking transitions, even after (partially) gauging the initial symmetry mathcal{S}: they are phase transitions without hidden symmetry breaking. We illustrate this with an (anomalous) finite group symmetry in 1+1d, which exhibits such intrinsically beyond Landau transitions.

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We introduce the concept of twin phases for a symmetry mathcalS, defined as inequivalent phases, whose order parameters are part of the same generalized charge under mathcalS.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2605.31601 [2] arXiv https://arxiv.org/abs/2605.31601 [3] Publisher https://arxiv.org/abs/2605.31601

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