Article
Physics, Particles & Fields
Andreas Blommaert, Luca Iliesiu, Jorrit Kruthoff
Summary: This study focuses on factorizing theories of dilaton gravity with a universal bilocal interaction. These theories have discrete spectra, distinguished only by their local dilaton potentials. The authors show how such theories can be used to construct all alpha-states in the Hilbert space of baby universes in ordinary JT gravity. They also find that different classes of these theories with different local potentials are non-perturbatively equivalent and have identical discrete spectra, demonstrating the equivalence of different bulk descriptions in giving rise to the same boundary theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Daniel Elander, Michele Frigerio, Marc Knecht, Jean-Loic Kneur
Summary: This article continues the study of strongly-coupled, approximately scale-invariant gauge theories with a large number of flavours, focusing on their application in the composite-Higgs scenario. By extending the holographic models, the authors compute the spectrum of composite fermionic states and observe the presence of light fermionic bound states in certain regions of parameter space. Additionally, a dense spectrum of states is observed in the presence of multi-scale dynamics induced by a large backreaction of bulk scalars on the geometry. The linear coupling between composite and elementary fermions is also studied, revealing that it can be dangerously irrelevant in certain circumstances. Finally, the partially composite spectrum is computed and its potential phenomenological implications, such as for top-quark partners, are assessed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Baur Mukhametzhanov
Summary: We study the factorization problem in holographic toy models, SYK and Matrix Models. In theories with fixed couplings, we introduce a fictitious ensemble averaging using a projector onto fixed couplings. By computing the squared partition function, we find that for a typical choice of fixed couplings, it can be approximated by a wormhole term plus a pair of linked half-wormholes. This resolves the factorization problem. We also propose the form of the pair of linked half-wormholes contribution in a matrix model with an arbitrary potential.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Elena Caceres, Rodrigo Castillo Vasquez, Alejandro Vilar Lopez
Summary: The study derives the holographic entanglement entropy functional for a gravitational theory up to cubic order in the Riemann tensor, showcasing the differences between minimal and non-minimal splittings. The results are applied to specific examples and show that causal wedge inclusion is respected for a wide range of values of the cubic coupling.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Vijay Balasubramanian, Matthew DeCross, Arjun Kar, Yue (Cathy) Li, Onkar Parrikar
Summary: This study uses the SYK family of models to investigate the complexity of time evolution in free, integrable, and chaotic systems. The study reveals how the complexity growth is eventually truncated by the appearance and accumulation of conjugate points, leading to different behaviors in different types of systems.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Yi-Yu Lin, Jia-Rui Sun, Yuan Sun, Jie-Chen Jin
Summary: This study provides a bit thread description of the AdS/BCFT setup, characterizing the specific entanglement details between different parts of the system with an entanglement island. The research also distinguishes between the fine-grained PEE and the semi-classical PEE in the context of an island.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Sangmin Choi, Finn Larsen
Summary: We discuss AdS(2) quantum gravity from an unconventional perspective which focuses on bulk geometry. Our approach avoids divergences and renormalization by omitting the dilaton of JT-gravity and considering AdS(2) without boundaries. This results in the standard Schwarzian theory. Our derivation relies on the conventional AdS/CFT correspondence and effective quantum field theory, providing advantages such as clarifying the symmetry breaking pattern and treating non-compact AdS(2) topology on equal footing with compact Riemann surfaces.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Felipe Rosso, Gustavo J. Turiaci
Summary: In this paper, we analyze the deformations of N = 1 Jackiw-Teitelboim supergravity by adding a gas of defects and compute the partition function using a topological expansion. We find that it matches the perturbative expansion of a random matrix model, providing a non-perturbative completion of the N = 1 dilaton-supergravity theories. We also show that the negative spectral density problem can be resolved using the matrix model description through a phase transition.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Budhaditya Bhattacharjee, Chethan Krishnan, Debajyoti Sarkar
Summary: This paper discusses various aspects of the HKLL bulk reconstruction for the free scalar field in AdSd+1. The authors consider the spacelike reconstruction kernel for the non-normalizable mode in global coordinates, constructing it as a mode sum. They propose a chordal Green's function approach to reproduce it in even bulk dimensions, putting the global AdS results for the non-normalizable mode on par with results for the normalizable mode in the literature. Explicit mode sum results in Poincaré AdS are presented for both normalizable and non-normalizable kernels in general even and odd dimensions. These results can be rewritten to match the global AdS results through an antipodal mapping and a remainder for generic scaling dimension delta. The construction of the non-normalizable mode is motivated by understanding linear wave equations in general spacetimes from a holographic perspective. The authors note interesting features within AdS/CFT when the scaling dimension delta is in the Breitenlohner-Freedman window.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Eivind Jorstad, Robert C. Myers, Shan-Ming Ruan
Summary: We study holographic complexity in de Sitter spacetime and find that it exhibits universal behavior in different approaches. Specifically, holographic complexity shows 'hyperfast' growth and appears to diverge with a universal power law at a finite critical time. We introduce a cutoff surface to regulate this divergence, and the subsequent growth of holographic complexity is linear in time.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Stefano Antonini, Gregory Bentsen, ChunJun Cao, Jonathan Harper, Shao-Kai Jian, Brian Swingle
Summary: This paper investigates the effects of local projective measurements on the dual spacetime in holography. It is found that such measurements destroy parts of the bulk geometry and result in post-measurement bulk spacetimes that are cut off by end-of-the-world branes. The preserved portions of the bulk geometry depend on the size of the measured region and the state being projected. Furthermore, measurements teleport part of the bulk information originally encoded in the measured region into the complementary region.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Yi-Yu Lin, Jie-Chen Jin
Summary: In this paper, we introduce a property of bit threads called thread/state correspondence, which has not been explicitly proposed before. By using this correspondence, we can construct explicit expressions for the SS states corresponding to a set of bulk extremal surfaces in the holographic SS correspondence. Furthermore, we demonstrate the close relationship between the holographic qubit threads model and holographic tensor networks, kinematic space, and spacetime connectivity.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Marcelo Botta Cantcheff
Summary: We derive a prescription to compute the expansion of states describing spacetimes with general spatial topology in arbitrary dimension, which coincides with the Schmidt decomposition for large N. The coefficients of the expansion are given by n-point correlation functions on a specific Euclidean geometry. We show that this applies to all spacetimes that admit a Hartle-Hawking type of wave functional and can be mapped to CFT states defined on the asymptotic boundary through a standard hypothesis on the spatial topology. It is also observed that these states exhibit quantum coherence properties. By applying this as holographic engineering, one can construct an emergent space geometry with a predetermined topology by preparing an entangled state of the dual quantum system. As an example, we calculate the expansion and characterize a spacetime with an initial spatial topology of a genus one handlebody.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Edgar Shaghoulian, Leonard Susskind
Summary: This paper expands on two recent proposals to generalize the Ryu-Takayanagi and Hubeny-Rangamani-Takayanagi formulas to de Sitter space, referred to as the monolayer and bilayer proposals. These proposals replace the boundary of AdS with the boundaries of static-patches or event horizons. The paper applies the rules of each proposal to various cases and demonstrates that they produce expected results. While the monolayer and bilayer proposals often yield the same results, they disagree in one specific situation. A better understanding of the thermodynamic limit of holographic systems is needed to definitively decide between the two.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Edgar Shaghoulian
Summary: This paper explores whether the central dogma of cosmological horizons has any support and proposes consistent answers with the quantum theory of de Sitter space, including a vanishing total entropy, an entropy of A/4G(N) on a single static patch, increasing entropy of a subregion as the region size grows, an island-like transition at half the horizon size, and a de Sitter version of the Hartman-Maldacena transition.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
