2019/12/16 by Richard C. Brower, Cameron V. Cogburn, A. Liam Fitzpatrick +2 · 48 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Gauge theory #Lattice (music) #Lattice field theory #Mathematical physics #Noncommutative and Quantum Gravity Theories #Physics #Quantum #Quantum gravity #Quantum mechanics #Theoretical physics #hep-lat #hep-th
paper · pdf · doi:10.1103/physrevd.103.094507
published in Physical review. D/Physical review. D. 103(9) (American Physical Society) · 36 pages, 12 figures
arxiv created 2019/12/16 · openalex created_date 2019/12/26 · openalex publication_date 2021/05/14 · arxiv updated 2021/05/19 · openalex updated_date 2026/08/05
Holographic conformal field theories (CFTs) are usually studied in a limit where the gravity description is weakly coupled. By contrast, lattice quantum field theory can be used as a tool for doing computations in a wider class of holographic CFTs where nongravitational interactions in AdS become strong, and gravity is decoupled. We take preliminary steps for studying such theories on the lattice by constructing the discretized theory of a scalar field in AdS2 and investigating its approach to the continuum limit in the free and perturbative regimes. Our main focus is on finite sublattices of maximally symmetric tilings of hyperbolic space. Up to boundary effects, these tilings preserve the triangle group as a large discrete subgroup of AdS2, but have a minimum lattice spacing that is comparable to the radius of curvature of the underlying spacetime. We quantify the effects of the lattice spacing as well as the boundary effects, and find that they can be accurately modeled by modifications within the framework of the continuum limit description. We also show how to do refinements of the lattice that shrink the lattice spacing at the cost of breaking the triangle group symmetry of the maximally symmetric tilings.