Holographic duality from Howe duality: Chern-Simons gravity as an ensemble of code CFTs

• URL: http://arxiv.org/abs/2504.08724v1
• Date: Fri, 11 Apr 2025 17:40:52 GMT
• Title: Holographic duality from Howe duality: Chern-Simons gravity as an ensemble of code CFTs
• Authors: Anatoly Dymarsky, Johan Henriksson, Brian McPeak,
• Abstract summary: We discuss the holographic correspondence between 3d "Chern-Simons gravity" and an ensemble of 2d Narain code CFTs.<n>We show that the mathematical identity underlying this holographic duality can be understood and rigorously proven.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We discuss the holographic correspondence between 3d "Chern-Simons gravity" and an ensemble of 2d Narain code CFTs. Starting from 3d abelian Chern-Simons theory, we construct an ensemble of boundary CFTs defined by gauging all possible maximal subgroups of the bulk one-form symmetry. Each maximal non-anomalous subgroup is isomorphic to a classical even self-dual error-correcting code over $\mathbb Z_p\times \mathbb Z_p$, providing a way to define a boundary "code CFT." The average over the ensemble of such theories is holographically dual to Chern-Simons gravity, a bulk theory summed over 3d topologies sharing the same boundary. In the case of prime $p$, the sum reduces to that over handlebodies, i.e. becomes the Poincar\'e series akin to that in semiclassical gravity. As the main result of the paper, we show that the mathematical identity underlying this holographic duality can be understood and rigorously proven using the framework of Howe duality over finite fields. This framework is concerned with the representation theory of two commuting groups forming a dual pair: the symplectic group of modular transformations of the boundary, and an orthogonal group mapping codes to each other. Finally, we reformulate the holographic duality as an identity between different averages over quantum stabilizer states, providing an interpretation in terms of quantum information theory.

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