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arxiv: 2605.28748 · v1 · pith:3MVFHWBPnew · submitted 2026-05-27 · ✦ hep-th · math-ph· math.MP· math.QA

Filtering out Erratic Observables: Wormholes from Gauging Nonlocal Symmetries

Pith reviewed 2026-06-29 11:02 UTC · model grok-4.3

classification ✦ hep-th math-phmath.MPmath.QA
keywords wormholesCFT dualitynonlocal symmetriesmonodromy databoundary gravitonsensemble averaginggauging symmetriesholographic gravity
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The pith

Gauging nonlocal symmetries generated by monodromy data in two CFTs filters erratic observables while preserving a wormhole Hilbert subspace.

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

The paper argues that wormhole contributions to the gravitational path integral reflect correlations among erratic large-N behaviors of dual CFTs. In (2+1)D gravity, boundary gravitons have a nontrivial center in their observable algebra, completed by an algebra of monodromy data representing one-sided black holes. Positivity restrictions on this data produce erratic observables that are removed by gauging the associated nonlocal symmetries. For two CFTs, the surviving subspace yields a filtered partition function that is an ensemble average over quantum gates entangling monodromy degrees of freedom, with preserved correlations appearing as wormhole terms.

Core claim

One-sided boundary gravitons are intrinsically incomplete with a nontrivial center in their observable algebra. Completions via asymptotic symmetries yield a commutant given by monodromy data. Gauging the nonlocal symmetries from these data filters erratic observables. For two CFTs this leaves a Hilbert subspace describing wormholes, with the filtered partition function as an ensemble average over entangling quantum gates on the monodromy degrees of freedom.

What carries the argument

Monodromy observable algebra that completes the boundary gravitons and generates nonlocal symmetries lacking local currents; gauging the global part of these symmetries filters the Hilbert space to retain wormhole contributions.

If this is right

  • For one CFT, gauging the nonlocal symmetries removes all black hole states.
  • The filtered partition function of CFTs exhibits an apparent ensemble averaging.
  • The correlation between the erratic observables of two CFTs is preserved and contributes to the filtered partition function as a wormhole term.
  • Only positivity-restricted monodromy data is needed to describe Lorentzian multi-boundary wormholes.
  • The filtered partition function of two CFTs is an ensemble average over quantum gates entangling the monodromy degrees of freedom.

Where Pith is reading between the lines

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

  • This construction may extend to higher-dimensional holography if analogous nonlocal symmetries can be identified in the dual CFTs.
  • It suggests wormholes can arise as a consequence of symmetry gauging rather than purely from summing over geometries in the path integral.
  • Solvable CFT models could provide a direct test of whether the ensemble average over entangling gates reproduces known wormhole geometries.
  • The entangling gates on monodromy data may link to quantum information interpretations of black hole interiors.

Load-bearing premise

The commutant of the boundary graviton observable algebra is an observable algebra of monodromy data interpreted as an effective description of one-sided black holes, and only the positivity-restricted data is needed to describe Lorentzian multi-boundary wormholes.

What would settle it

An explicit calculation of the gauged partition function for a concrete pair of CFTs that fails to reproduce the wormhole term expected from the gravitational path integral.

Figures

Figures reproduced from arXiv: 2605.28748 by Qi-Feng Wu.

Figure 2.1
Figure 2.1. Figure 2.1: The outer solid circle represents the asymptotic boundary where Eq. (2.34) holds. [PITH_FULL_IMAGE:figures/full_fig_p013_2_1.png] view at source ↗
Figure 2.2
Figure 2.2. Figure 2.2: The outer black circle represents the asymptotic boundary. The green dot represents [PITH_FULL_IMAGE:figures/full_fig_p014_2_2.png] view at source ↗
Figure 2.3
Figure 2.3. Figure 2.3: The outer black circle represents the asymptotic boundary. The green dot represents [PITH_FULL_IMAGE:figures/full_fig_p016_2_3.png] view at source ↗
Figure 3.1
Figure 3.1. Figure 3.1: The outer black circle represents the asymptotic boundary. The green dot represents [PITH_FULL_IMAGE:figures/full_fig_p021_3_1.png] view at source ↗
Figure 3.2
Figure 3.2. Figure 3.2: The outer black circle represents the asymptotic boundary. The green dot rep [PITH_FULL_IMAGE:figures/full_fig_p025_3_2.png] view at source ↗
Figure 4.1
Figure 4.1. Figure 4.1: Erratic behavior of the real part of q˜ in the large N limit (GN → 0). Eqs. (4.34) and (4.39) imply that the modular dual operators m˜e, m˜f , and mKe are singular in the large N limit (k → ∞). The modular dual algebra Uq˜(sl(2, R)) does not have a classical limit (ℏ → 0) either, because the dual quantization parameter (4.40) is not analytic at ℏ = 0. See [PITH_FULL_IMAGE:figures/full_fig_p035_4_1.png] view at source ↗
Figure 6.1
Figure 6.1. Figure 6.1: On the left is a schematic illustration of a bulk Cauchy slice dual to one CFT. The [PITH_FULL_IMAGE:figures/full_fig_p045_6_1.png] view at source ↗
Figure 6.2
Figure 6.2. Figure 6.2: On the left is a schematic illustration of a bulk Cauchy slice dual to two CFTs. [PITH_FULL_IMAGE:figures/full_fig_p052_6_2.png] view at source ↗
read the original abstract

The wormhole contribution to the gravitational path integral may be interpreted as smooth remnant of correlations among the erratic large-$N$ behaviors of dual CFTs. In this work, we investigate this idea in (2+1)-dimensional gravity. We show that one-sided boundary gravitons are intrinsically incomplete in the sense that the associated observable algebra has a nontrivial center regardless of choices of boundary conditions. Based on asymptotic symmetries, we bootstrap a general Poisson bracket to construct completions of the boundary gravitons. In the simplest completion, the commutant of the boundary graviton observable algebra is given by an observable algebra of monodromy data which we interpret as an effective description of one-sided black holes. We show that, to describe Lorentzian multi-boundary wormholes, only the monodromy data with a positivity restriction is needed. The positivity restriction results in emergent erratic large-$N$ behaviors for some observables. We filter out the erratic observables by restricting to a subspace on which they act trivially. The monodromy observables generate nonlocal symmetries lack of corresponding local currents. We show that gauging the nonlocal symmetries is equivalent to filtering out the erratic observables. For one CFT, gauging the nonlocal symmetries at the quantum level removes all black hole states. Filtering the partition function of CFTs leads to an apparent ensemble averaging. For two CFTs, a Hilbert subspace describing wormholes survives after gauging global part of the nonlocal symmetries. The filtered partition function of the two CFTs is an ensemble average over quantum gates entangling the monodromy degrees of freedom the two CFTs. The correlation between the erratic observables of the two CFTs is preserved, which contributes to the filtered partition function as a wormhole term.

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 claims that in (2+1)D gravity the observable algebra of one-sided boundary gravitons is incomplete, possessing a nontrivial center independent of boundary conditions. A general Poisson bracket is bootstrapped from asymptotic symmetries to complete the algebra; its commutant is identified with an algebra of monodromy data, interpreted as an effective description of one-sided black holes. Only the positivity-restricted subset of this data is required for Lorentzian multi-boundary wormholes. This restriction produces emergent erratic large-N observables that are filtered by restricting to the subspace on which they act trivially. The monodromy observables generate nonlocal symmetries without local currents; gauging these symmetries is equivalent to the filtering procedure. For a single CFT, gauging removes all black-hole states. For two CFTs, gauging the global part of the nonlocal symmetries leaves a surviving Hilbert subspace whose filtered partition function is an ensemble average over quantum gates that entangle the monodromy degrees of freedom, with the preserved correlations between erratic observables contributing the wormhole term.

Significance. If the central identification of the commutant and the equivalence between gauging and filtering are rigorously established, the work supplies a CFT-side mechanism that derives wormhole contributions directly from the gauging of nonlocal symmetries, thereby linking ensemble averaging to the survival of a wormhole subspace without invoking the gravitational path integral. The bootstrapping of the Poisson bracket and the use of positivity restrictions to select the Lorentzian sector constitute a concrete technical proposal that could be tested against known AdS3 wormhole geometries.

major comments (2)
  1. [Abstract / Poisson-bracket bootstrap section] Abstract and the section on the Poisson-bracket bootstrap: the claim that a general Poisson bracket can be bootstrapped such that the commutant of the completed boundary-graviton algebra is exactly the monodromy-data algebra is stated without explicit bracket relations, without an independent verification that the center remains nontrivial for arbitrary boundary conditions, and without a check that the positivity restriction selects the correct Lorentzian sector. This identification is load-bearing for every subsequent step (erratic observables, filtering, gauging equivalence, and the two-CFT wormhole term).
  2. [Section on gauging nonlocal symmetries] The paragraph asserting equivalence between gauging nonlocal symmetries and filtering erratic observables: the manuscript equates the two operations at the quantum level but supplies no explicit operator-level map or Hilbert-space projection that demonstrates the equivalence holds after completion of the algebra.
minor comments (2)
  1. Notation for the monodromy observables and the positivity restriction should be introduced with a clear definition of the inner product or trace used to impose positivity.
  2. The manuscript would benefit from an explicit comparison of the filtered two-CFT partition function with known ensemble-averaged expressions in the literature on JT gravity or AdS3 wormholes.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the careful reading and for highlighting the need for greater explicitness in the technical foundations. We address each major comment below and will incorporate the requested clarifications and verifications in a revised manuscript.

read point-by-point responses
  1. Referee: [Abstract / Poisson-bracket bootstrap section] Abstract and the section on the Poisson-bracket bootstrap: the claim that a general Poisson bracket can be bootstrapped such that the commutant of the completed boundary-graviton algebra is exactly the monodromy-data algebra is stated without explicit bracket relations, without an independent verification that the center remains nontrivial for arbitrary boundary conditions, and without a check that the positivity restriction selects the correct Lorentzian sector. This identification is load-bearing for every subsequent step (erratic observables, filtering, gauging equivalence, and the two-CFT wormhole term).

    Authors: We agree that the bootstrap section requires explicit bracket relations and independent checks to support the central identification. In the revision we will insert the explicit Poisson brackets obtained from the asymptotic symmetry generators, demonstrate that the resulting center is nontrivial for general boundary conditions by varying the fall-off parameters, and add a direct comparison of the positivity-restricted monodromy data against known Lorentzian multi-boundary wormhole solutions in AdS3. These additions will be placed immediately after the bootstrap construction. revision: yes

  2. Referee: [Section on gauging nonlocal symmetries] The paragraph asserting equivalence between gauging nonlocal symmetries and filtering erratic observables: the manuscript equates the two operations at the quantum level but supplies no explicit operator-level map or Hilbert-space projection that demonstrates the equivalence holds after completion of the algebra.

    Authors: We acknowledge that an explicit operator-level demonstration is currently absent. In the revised manuscript we will supply a concrete map: we define the gauging operation as the projection onto the joint kernel of the nonlocal symmetry generators and show that this coincides with the subspace on which the erratic observables act as the identity. The resulting filtered Hilbert space and partition function will be written explicitly for both the single-CFT and two-CFT cases. revision: yes

Circularity Check

0 steps flagged

No significant circularity; derivation is a self-contained mathematical construction

full rationale

The paper bootstraps a Poisson bracket from asymptotic symmetries to complete the boundary graviton observable algebra, shows its commutant is a monodromy algebra, selects the positivity-restricted subset as necessary to describe Lorentzian multi-boundary wormholes, establishes equivalence between gauging nonlocal symmetries and filtering erratic observables, and derives that the filtered two-CFT partition function preserves correlations as a wormhole term. No quoted step reduces a claimed prediction or result to an input by definition, fitted parameter, or self-citation chain; the positivity choice is presented as a derived requirement for the target sector rather than an ansatz that encodes the wormhole output in advance. The central identification is offered as a consequence of the bootstrap, making the overall chain independent of the final interpretive label.

Axiom & Free-Parameter Ledger

0 free parameters · 2 axioms · 2 invented entities

The central claim rests on standard 3D gravity assumptions plus newly introduced entities whose independent evidence is not supplied outside the paper's own construction.

axioms (2)
  • domain assumption One-sided boundary gravitons are intrinsically incomplete: their observable algebra has a nontrivial center regardless of boundary conditions.
    Invoked at the start of the abstract to motivate the completion step.
  • domain assumption Asymptotic symmetries permit bootstrapping a general Poisson bracket that constructs completions of the boundary graviton algebra.
    Used to introduce the monodromy data as the commutant.
invented entities (2)
  • Monodromy data observables no independent evidence
    purpose: Serve as the commutant completing the boundary graviton algebra and provide an effective description of one-sided black holes.
    Introduced via the Poisson bracket construction and given the black-hole interpretation.
  • Nonlocal symmetries generated by monodromy observables no independent evidence
    purpose: Lack local currents; their gauging is equivalent to filtering erratic observables and produces the wormhole term.
    Defined as the symmetries whose gauging implements the filtering.

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