The Cosmological Constant from a Quantum Gravitational $θ$-Vacua and the Gravitational Hall Effect
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| Format: | Preprint |
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2025
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| author | Alexander, Stephon Bernardo, Heliudson Hui, Aaron |
| author_facet | Alexander, Stephon Bernardo, Heliudson Hui, Aaron |
| contents | We provide a new perspective on the cosmological constant by exploring the background-independent Wheeler-DeWitt quantization of general relativity. The Chern-Simons-Kodama state of quantum gravity, a generalization of the Hartle-Hawking and Vilenkin states, has a striking structural similarity to the topological field theory of the quantum Hall effect. As a result, we study the gravitational topological $θ$-sectors in analogy to Yang-Mills theory. We find that the cosmological constant $Λ$ is intimately linked to the $θ$-parameter by $θ=12π^2/(Λ\ell^2_{\rm Pl}) \mod 2π$ due to the fact that Chern-Simons-Kodama state must live in a particular $θ$-sector. This result is shown in the canonical, non-perturbative formalism. Furthermore, we explain how the physics of the Hamiltonian constraint is analogous to the quantum Hall effect, with the cosmological constant playing the role of a quantum gravitational Hall resistivity. These relations suggest that $Λ$ is topologically protected against perturbative graviton loop corrections, analogous to the robustness of quantized Hall conductance against disorder in a metal. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_14886 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The Cosmological Constant from a Quantum Gravitational $θ$-Vacua and the Gravitational Hall Effect Alexander, Stephon Bernardo, Heliudson Hui, Aaron General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Mesoscale and Nanoscale Physics High Energy Physics - Theory Quantum Physics We provide a new perspective on the cosmological constant by exploring the background-independent Wheeler-DeWitt quantization of general relativity. The Chern-Simons-Kodama state of quantum gravity, a generalization of the Hartle-Hawking and Vilenkin states, has a striking structural similarity to the topological field theory of the quantum Hall effect. As a result, we study the gravitational topological $θ$-sectors in analogy to Yang-Mills theory. We find that the cosmological constant $Λ$ is intimately linked to the $θ$-parameter by $θ=12π^2/(Λ\ell^2_{\rm Pl}) \mod 2π$ due to the fact that Chern-Simons-Kodama state must live in a particular $θ$-sector. This result is shown in the canonical, non-perturbative formalism. Furthermore, we explain how the physics of the Hamiltonian constraint is analogous to the quantum Hall effect, with the cosmological constant playing the role of a quantum gravitational Hall resistivity. These relations suggest that $Λ$ is topologically protected against perturbative graviton loop corrections, analogous to the robustness of quantized Hall conductance against disorder in a metal. |
| title | The Cosmological Constant from a Quantum Gravitational $θ$-Vacua and the Gravitational Hall Effect |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Mesoscale and Nanoscale Physics High Energy Physics - Theory Quantum Physics |
| url | https://arxiv.org/abs/2506.14886 |