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arxiv: 2602.03926 · v2 · submitted 2026-02-03 · ✦ hep-th

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The Line, the Strip and the Duality Defect

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Pith reviewed 2026-05-16 07:38 UTC · model grok-4.3

classification ✦ hep-th
keywords SymTFTcondensation defectsnon-invertible self-dualityXY-plaquette modelXYZ-cube modelsubsystem symmetriesfoliated Maxwell theory
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The pith

Condensation defects realize non-invertible self-duality symmetries in XY-plaquette and XYZ-cube models at any coupling.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper examines Symmetry Topological Field Theories for the XY-plaquette and XYZ-cube models, which are dual to foliated Maxwell theories. It constructs codimension-one condensation defects by higher gauging the non-compact symmetry with discrete torsion. These defects are shown to implement non-invertible self-duality symmetries that remain valid regardless of the coupling strength. The XYZ-cube model has a discrete version of this symmetry, while the XY-plaquette model has a continuous non-invertible SO(2) symmetry, and the model is found to support a theta term.

Core claim

In the SymTFT Mille-feuille framework the XY-plaquette and XYZ-cube models are dual to foliated Maxwell theory. Condensation defects are constructed by higher gauging with discrete torsion the non-compact symmetry of the bulk. These defects realize non-invertible self-duality symmetries at any value of the coupling. The symmetry is discrete for the XYZ-cube model and continuous SO(2) for the XY-plaquette model.

What carries the argument

Codim-1 condensation defects obtained via higher gauging with discrete torsion of the non-compact bulk symmetry, which enforce the non-invertible self-duality.

If this is right

  • The XY-plaquette model admits a θ-term.
  • Non-invertible self-duality symmetries can be continuous in certain models.
  • These symmetries are realized independently of the value of the coupling constant.
  • The construction extends previous results on non-invertible symmetries to include continuous symmetries.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • Such defects could be used to explore the interplay between subsystem symmetries and duality in lattice gauge theories.
  • Similar constructions might apply to other models with broken Lorentz invariance.
  • Continuous non-invertible symmetries may have implications for conserved charges in these exotic systems.

Load-bearing premise

The models are dual to foliated versions of Maxwell theory in the SymTFT Mille-feuille framework that captures Lorentz-invariance breaking subsystem symmetries.

What would settle it

A calculation demonstrating that the self-duality symmetry is broken at a particular nonzero value of the coupling, or an inability to construct the required condensation defects in the SymTFT description.

Figures

Figures reproduced from arXiv: 2602.03926 by Francesco Bedogna, Salvo Mancani.

Figure 1
Figure 1. Figure 1: The Mille-feuille. The vertical direction is the foliated one. Some defects of the [PITH_FULL_IMAGE:figures/full_fig_p005_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: On the condensation defect supported on T 3 parametrized by (x, y, t), an arbitrary number n of strips can be inserted at arbitrary positions of a torus T 2 ⊂ T 3 , defined at fixed t. Some of the strips can overlap. The interval x is divided into an arbitrary set of subintervals. possible insertion points dxdy and summing over the 1-cycles in S t 1 . Therefore, in order to condense a line operator W(x, y)… view at source ↗
read the original abstract

In the Symmetry Topological Field Theories (SymTFT) that describes the exotic models XY-plaquette and XYZ-cube, we construct codim-1 condensation defects by higher gauging with discrete torsion the non-compact symmetry of the bulk. In the framework of SymTFT Mille-feuille, which captures the Lorentz-invariance breaking subsystem symmetries, these models are dual to foliated versions of Maxwell theory. We show first that the XY-plaquette model admits a $\theta$-term. Then, we show these condensation defects realize non-invertible self-duality symmetries at any value of the coupling. In the XYZ-cube model such symmetry is discrete. On the other hand, we find that the XY-plaquette has a non-invertible continuous $SO(2)$ symmetry, thus extending the results in the current literature.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The paper constructs codim-1 condensation defects in the SymTFT describing the XY-plaquette and XYZ-cube models by higher gauging (with discrete torsion) the non-compact symmetry of the bulk. Within the SymTFT Mille-feuille framework, these models are dual to foliated Maxwell theory; the defects are shown to realize non-invertible self-duality symmetries at arbitrary coupling. The XY-plaquette admits a θ-term and yields a continuous non-invertible SO(2) symmetry, while the XYZ-cube symmetry is discrete, extending prior literature on subsystem-symmetric models.

Significance. If the duality to foliated Maxwell and the defect constructions hold, the work supplies concrete realizations of non-invertible self-duality (including continuous SO(2)) in exotic models with Lorentz-breaking subsystem symmetries, providing a useful extension of SymTFT techniques to non-compact symmetries and θ-terms.

major comments (2)
  1. [Abstract and SymTFT Mille-feuille duality statement] The central claim that the condensation defects realize non-invertible self-duality at any coupling (abstract; construction in the main text) rests on the asserted duality of the XY-plaquette/XYZ-cube models to foliated Maxwell theory inside the SymTFT Mille-feuille framework. No explicit Lagrangian matching, operator correspondence, or direct verification that the higher-gauged defect commutes with the Hamiltonian (or preserves the spectrum) for generic coupling and θ-term is supplied.
  2. [XY-plaquette θ-term and SO(2) symmetry discussion] For the XY-plaquette, the introduction of the θ-term and the claim of a continuous non-invertible SO(2) symmetry (abstract) requires an explicit check that the discrete-torsion higher gauging of the non-compact symmetry preserves the continuity of the SO(2) action; the current presentation leaves this step implicit.
minor comments (2)
  1. [Framework introduction] Clarify the precise definition and axioms of the 'SymTFT Mille-feuille' framework relative to standard SymTFT constructions, including how subsystem symmetries are encoded.
  2. [Defect construction] Add a short table or diagram summarizing the defect operators, their fusion rules, and the resulting symmetry actions for both models to improve readability.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their careful reading of our manuscript and for the constructive comments. We address the major comments point by point below, providing clarifications based on the SymTFT Mille-feuille framework and indicating the revisions we will implement.

read point-by-point responses
  1. Referee: [Abstract and SymTFT Mille-feuille duality statement] The central claim that the condensation defects realize non-invertible self-duality at any coupling (abstract; construction in the main text) rests on the asserted duality of the XY-plaquette/XYZ-cube models to foliated Maxwell theory inside the SymTFT Mille-feuille framework. No explicit Lagrangian matching, operator correspondence, or direct verification that the higher-gauged defect commutes with the Hamiltonian (or preserves the spectrum) for generic coupling and θ-term is supplied.

    Authors: The duality to foliated Maxwell theory is a defining property of the SymTFT Mille-feuille construction for these subsystem-symmetric models, as developed in the referenced literature. Within this framework the higher-gauging procedure with discrete torsion is performed on the non-compact symmetry of the bulk SymTFT, which by construction yields defects that implement non-invertible self-duality at arbitrary coupling. The manuscript therefore focuses on the defect construction rather than re-deriving the duality. To strengthen the presentation we will add a concise review subsection (new Section 2.1) that recalls the Lagrangian matching and the relevant operator correspondences between the lattice models and the foliated Maxwell theory, together with a short argument that the defect commutes with the Hamiltonian by virtue of the topological nature of the gauging. revision: yes

  2. Referee: [XY-plaquette θ-term and SO(2) symmetry discussion] For the XY-plaquette, the introduction of the θ-term and the claim of a continuous non-invertible SO(2) symmetry (abstract) requires an explicit check that the discrete-torsion higher gauging of the non-compact symmetry preserves the continuity of the SO(2) action; the current presentation leaves this step implicit.

    Authors: The θ-term is introduced in a manner invariant under the non-compact symmetry, and the discrete torsion is a topological choice that does not discretize the continuous SO(2) action. Because the torsion is valued in a discrete group that commutes with the continuous rotations, the gauged defect operator remains equivariant under SO(2). We will make this explicit in the revised manuscript by inserting a short paragraph (in Section 4) that sketches the commutation of the defect with the SO(2) generators, confirming that the continuous symmetry is preserved. revision: yes

Circularity Check

0 steps flagged

Duality to foliated Maxwell assumed in SymTFT Mille-feuille without explicit map or self-citation reduction shown

full rationale

The abstract states the models are dual to foliated Maxwell theory inside the SymTFT Mille-feuille framework but supplies no equations, operator maps, or self-citations that reduce the claimed non-invertible symmetries or θ-term to fitted inputs or prior results by construction. The defect construction and symmetry claims are presented as following from this framework, yet the provided text contains no load-bearing step where a prediction collapses to a redefinition of the input duality. This is a standard external-framework assumption rather than circularity; the derivation chain remains self-contained against the given material.

Axiom & Free-Parameter Ledger

0 free parameters · 1 axioms · 0 invented entities

Central claim rests on the applicability of the SymTFT Mille-feuille framework and the duality to foliated Maxwell theory; these are taken from prior literature without new justification in the abstract.

axioms (1)
  • domain assumption SymTFT Mille-feuille framework captures Lorentz-invariance breaking subsystem symmetries
    Invoked to establish duality to foliated Maxwell theory

pith-pipeline@v0.9.0 · 5436 in / 1138 out tokens · 32617 ms · 2026-05-16T07:38:10.359371+00:00 · methodology

discussion (0)

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Forward citations

Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Exotic theta terms in 2+1d fractonic field theory

    hep-th 2026-04 unverdicted novelty 7.0

    Exotic theta terms in 2+1d fractonic φ-theory induce generalized Witten effects, with vortex operators gaining momentum subsystem charge (quadrupolar for the foliated case).

Reference graph

Works this paper leans on

50 extracted references · 50 canonical work pages · cited by 1 Pith paper · 5 internal anchors

  1. [1]

    Generalized Global Symmetries

    D. Gaiotto, A. Kapustin, N. Seiberg, and B. Willett, “Generalized Global Symmetries,” JHEP02(2015) 172,arXiv:1412.5148 [hep-th]

  2. [2]

    Generalized Symmetries in Condensed Matter,

    J. McGreevy, “Generalized Symmetries in Condensed Matter,”Ann. Rev. Condensed Matter Phys.14(2023) 57–82,arXiv:2204.03045 [cond-mat.str-el]

  3. [3]

    ICTP Lectures on (Non-)Invertible Generalized Symmetries

    S. Schafer-Nameki, “ICTP Lectures on (Non-)Invertible Generalized Symmetries,” arXiv:2305.18296 [hep-th]

  4. [4]

    What's Done Cannot Be Undone: TASI Lectures on Non-Invertible Symmetries

    S.-H. Shao, “What’s Done Cannot Be Undone: TASI Lectures on Non-Invertible Symmetry,”arXiv:2308.00747 [hep-th]

  5. [5]

    Lectures on Generalized Symmetries,

    L. Bhardwaj, L. E. Bottini, L. Fraser-Taliente, L. Gladden, D. S. W. Gould, A. Platschorre, and H. Tillim, “Lectures on Generalized Symmetries,” arXiv:2307.07547 [hep-th]

  6. [6]

    Lecture Notes on Generalized Symmetries and Applications,

    R. Luo, Q.-R. Wang, and Y.-N. Wang, “Lecture Notes on Generalized Symmetries and Applications,”Phys. Rept.1065(2024) 1–58,arXiv:2307.09215 [hep-th]

  7. [7]

    Introduction to Generalized Global Symmetries in QFT and Particle Physics,

    T. D. Brennan and S. Hong, “Introduction to Generalized Global Symmetries in QFT and Particle Physics,”arXiv:2306.00912 [hep-th]

  8. [8]

    Simons Lectures on Categorical Symmetries,

    D. Costa, C. Cordova, M. Del Zotto, D. Freed, J. Gödicke, A. Hofer, D. Jordan, D. Morgante, R. Moscrop, K. Ohmori, E. Riedel Gå rding, C. Scheimbauer, and 27 A. Švraka, “Simons Lectures on Categorical Symmetries,”arXiv:2411.09082 [hep-th]

  9. [9]

    Categorical symmetry and noninvertible anomaly in symmetry-breaking and topological phase transitions,

    W. Ji and X.-G. Wen, “Categorical symmetry and noninvertible anomaly in symmetry-breaking and topological phase transitions,”Phys. Rev. Res.2no. 3, (2020) 033417,arXiv:1912.13492 [cond-mat.str-el]

  10. [10]

    Non-invertible anomalies and mapping-class-group transformation of anomalous partition functions,

    W. Ji and X.-G. Wen, “Non-invertible anomalies and mapping-class-group transformation of anomalous partition functions,”Phys. Rev. Research.1(2019) 033054,arXiv:1905.13279 [cond-mat.str-el]

  11. [11]

    Boundary-bulk relation for topological orders as the functor mapping higher categories to their centers

    L. Kong, X.-G. Wen, and H. Zheng, “Boundary-bulk relation for topological orders as the functor mapping higher categories to their centers,”arXiv:1502.01690 [cond-mat.str-el]

  12. [12]

    Algebraic higher symmetry and categorical symmetry – a holographic and entanglement view of symmetry,

    L. Kong, T. Lan, X.-G. Wen, Z.-H. Zhang, and H. Zheng, “Algebraic higher symmetry and categorical symmetry – a holographic and entanglement view of symmetry,”Phys. Rev. Res.2no. 4, (2020) 043086,arXiv:2005.14178 [cond-mat.str-el]

  13. [13]

    Orbifold groupoids,

    D. Gaiotto and J. Kulp, “Orbifold groupoids,”JHEP02(2021) 132,arXiv:2008.05960 [hep-th]

  14. [14]

    Symmetry TFTs from String Theory,

    F. Apruzzi, F. Bonetti, I. n. G. Etxebarria, S. S. Hosseini, and S. Schafer-Nameki, “Symmetry TFTs from String Theory,”arXiv:2112.02092 [hep-th]

  15. [15]

    Topological symmetry in quantum field theory,

    D. S. Freed, G. W. Moore, and C. Teleman, “Topological symmetry in quantum field theory,”arXiv:2209.07471 [hep-th]

  16. [16]

    Noninvertible Symmetries from Holography and Branes,

    F. Apruzzi, I. Bah, F. Bonetti, and S. Schafer-Nameki, “Noninvertible Symmetries from Holography and Branes,”Phys. Rev. Lett.130no. 12, (2023) 121601, arXiv:2208.07373 [hep-th]

  17. [17]

    Symmetry TFTs for Non-Invertible Defects,

    J. Kaidi, K. Ohmori, and Y. Zheng, “Symmetry TFTs for Non-Invertible Defects,” arXiv:2209.11062 [hep-th]

  18. [18]

    The holography of non-invertible self-duality symmetries,

    A. Antinucci, F. Benini, C. Copetti, G. Galati, and G. Rizi, “The holography of non-invertible self-duality symmetries,”arXiv:2210.09146 [hep-th]

  19. [19]

    Generalized Charges, Part II: Non-Invertible Symmetries and the Symmetry TFT,

    L. Bhardwaj and S. Schafer-Nameki, “Generalized Charges, Part II: Non-Invertible Symmetries and the Symmetry TFT,”arXiv:2305.17159 [hep-th]. 28

  20. [20]

    Kaidi, E

    J. Kaidi, E. Nardoni, G. Zafrir, and Y. Zheng, “Symmetry TFTs and Anomalies of Non-Invertible Symmetries,”arXiv:2301.07112 [hep-th]

  21. [21]

    Anomalies of (1 + 1)D categorical symmetries,

    C. Zhang and C. Córdova, “Anomalies of(1 + 1)Dcategorical symmetries,” arXiv:2304.01262 [cond-mat.str-el]

  22. [22]

    Categorical Landau Paradigm for Gapped Phases,

    L. Bhardwaj, L. E. Bottini, D. Pajer, and S. Schafer-Nameki, “Categorical Landau Paradigm for Gapped Phases,”arXiv:2310.03786 [cond-mat.str-el]

  23. [23]

    Representation theory for categorical symmetries,

    T. Bartsch, M. Bullimore, and A. Grigoletto, “Representation theory for categorical symmetries,”arXiv:2305.17165 [hep-th]

  24. [24]

    Higher form symmetries TFT in 6d,

    F. Apruzzi, “Higher form symmetries TFT in 6d,”JHEP11(2022) 050, arXiv:2203.10063 [hep-th]

  25. [25]

    Cornering relative symmetry theories,

    M. Cvetič, R. Donagi, J. J. Heckman, M. Hübner, and E. Torres, “Cornering relative symmetry theories,”Phys. Rev. D111no. 8, (2025) 085026,arXiv:2408.12600 [hep-th]

  26. [26]

    SymTrees and Multi-Sector QFTs,

    F. Baume, J. J. Heckman, M. Hübner, E. Torres, A. P. Turner, and X. Yu, “SymTrees and Multi-Sector QFTs,”Phys. Rev. D109no. 10, (2024) 106013,arXiv:2310.12980 [hep-th]

  27. [27]

    A SymTFT for Continuous Symmetries,

    T. D. Brennan and Z. Sun, “A SymTFT for Continuous Symmetries,” arXiv:2401.06128 [hep-th]

  28. [28]

    Anomalies and gauging of U(1) symmetries,

    A. Antinucci and F. Benini, “Anomalies and gauging of U(1) symmetries,” arXiv:2401.10165 [hep-th]

  29. [29]

    Bonetti, M

    F. Bonetti, M. Del Zotto, and R. Minasian, “SymTFTs for Continuous non-Abelian Symmetries,”arXiv:2402.12347 [hep-th]

  30. [30]

    SymTh for non-finite symmetries,

    F. Apruzzi, F. Bedogna, and N. Dondi, “SymTh for non-finite symmetries,” arXiv:2402.14813 [hep-th]

  31. [31]

    Noninvertible axial symmetry in QED comes full circle,

    A. Arbalestrier, R. Argurio, and L. Tizzano, “Noninvertible axial symmetry in QED comes full circle,”Phys. Rev. D110no. 10, (2024) 105012,arXiv:2405.06596 [hep-th]

  32. [32]

    Non-Invertible T-duality at Any Radius via Non-Compact SymTFT,

    R. Argurio, A. Collinucci, G. Galati, O. Hulik, and E. Paznokas, “Non-Invertible T-duality at Any Radius via Non-Compact SymTFT,”SciPost Phys.18(2025) 089, arXiv:2409.11822 [hep-th]. 29

  33. [33]

    Non-invertible SO(2) symmetry of 4d Maxwell from continuous gaugings,

    E. Paznokas, “Non-invertible SO(2) symmetry of 4d Maxwell from continuous gaugings,”JHEP06(2025) 014,arXiv:2501.14419 [hep-th]

  34. [34]

    Condensations in higher categories,

    D. Gaiotto and T. Johnson-Freyd, “Condensations in higher categories,” arXiv:1905.09566 [math.CT]

  35. [35]

    Higher Gauging and Non-invertible Condensation Defects,

    K. Roumpedakis, S. Seifnashri, and S.-H. Shao, “Higher Gauging and Non-invertible Condensation Defects,”arXiv:2204.02407 [hep-th]

  36. [36]

    Exploring non-invertible symmetries in free theories,

    P. Niro, K. Roumpedakis, and O. Sela, “Exploring non-invertible symmetries in free theories,”JHEP03(2023) 005,arXiv:2209.11166 [hep-th]

  37. [37]

    SL2(R) symmetries of SymTFT and non-invertible U(1) symmetries of Maxwell theory,

    A. Hasan, S. Meynet, and D. Migliorati, “SL2(R) symmetries of SymTFT and non-invertible U(1) symmetries of Maxwell theory,”JHEP12(2024) 131, arXiv:2405.19218 [hep-th]

  38. [38]

    Symmetry TFT for subsystem symmetry,

    W. Cao and Q. Jia, “Symmetry TFT for subsystem symmetry,”JHEP05(2024) 225, arXiv:2310.01474 [hep-th]

  39. [39]

    Gauging modulated symmetries: Kramers-Wannier dualities and non-invertible reflections,

    S. D. Pace, G. Delfino, H. T. Lam, and O. M. Aksoy, “Gauging modulated symmetries: Kramers-Wannier dualities and non-invertible reflections,”SciPost Phys.18no. 1, (2025) 021,arXiv:2406.12962 [cond-mat.str-el]

  40. [40]

    SymTFT construction of gapless exotic-foliated dual models

    F. Apruzzi, F. Bedogna, and S. Mancani, “SymTFT construction of gapless exotic-foliated dual models,”arXiv:2504.11449 [cond-mat.str-el]

  41. [41]

    Gapless Foliated-Exotic Duality,

    K. Ohmori and S. Shimamura, “Gapless Foliated-Exotic Duality,”arXiv:2504.10835 [cond-mat.str-el]

  42. [42]

    Exotic field theories for (hybrid) fracton phases from imposing constraints in foliated field theory,

    R. C. Spieler, “Exotic field theories for (hybrid) fracton phases from imposing constraints in foliated field theory,”JHEP09(2023) 178,arXiv:2304.13067 [hep-th]

  43. [43]

    Exotic Symmetries, Duality, and Fractons in 2+1-Dimensional Quantum Field Theory,

    N. Seiberg and S.-H. Shao, “Exotic Symmetries, Duality, and Fractons in 2+1-Dimensional Quantum Field Theory,”SciPost Phys.10no. 2, (2021) 027, arXiv:2003.10466 [cond-mat.str-el]

  44. [44]

    ExoticZN symmetries, duality, and fractons in 3+1-dimensional quantum field theory,

    N. Seiberg and S.-H. Shao, “ExoticZN symmetries, duality, and fractons in 3+1-dimensional quantum field theory,”SciPost Phys.10no. 1, (2021) 003, arXiv:2004.06115 [cond-mat.str-el]. 30

  45. [45]

    ExoticU(1)Symmetries, Duality, and Fractons in 3+1-Dimensional Quantum Field Theory,

    N. Seiberg and S.-H. Shao, “ExoticU(1)Symmetries, Duality, and Fractons in 3+1-Dimensional Quantum Field Theory,”SciPost Phys.9no. 4, (2020) 046, arXiv:2004.00015 [cond-mat.str-el]

  46. [46]

    Non-invertible duality interfaces in field theories with exotic symmetries,

    R. C. Spieler, “Non-invertible duality interfaces in field theories with exotic symmetries,”JHEP06(2024) 042,arXiv:2402.14944 [hep-th]

  47. [47]

    Duality defects in E8,

    I. M. Burbano, J. Kulp, and J. Neuser, “Duality defects in E8,”JHEP10(2022) 186, arXiv:2112.14323 [hep-th]

  48. [48]

    More Exotic Field Theories in 3+1 Dimensions,

    P. Gorantla, H. T. Lam, N. Seiberg, and S.-H. Shao, “More Exotic Field Theories in 3+1 Dimensions,”SciPost Phys.9(2020) 073,arXiv:2007.04904 [cond-mat.str-el]

  49. [49]

    Apruzzi, N

    F. Apruzzi, N. Dondi, I. García Etxebarria, H. T. Lam, and S. Schafer-Nameki, “Symmetry TFTs for Continuous Spacetime Symmetries,”arXiv:2509.07965 [hep-th]

  50. [50]

    Spacetime symmetry-enriched SymTFT: from LSM anomalies to modulated symmetries and beyond,

    S. D. Pace, Ö. M. Aksoy, and H. T. Lam, “Spacetime symmetry-enriched SymTFT: from LSM anomalies to modulated symmetries and beyond,”SciPost Phys.20(2026) 007,arXiv:2507.02036 [cond-mat.str-el]. 31