Article
Physics, Particles & Fields
Christoph Chiaffrino, Olaf Hohm, Allison F. Pinto
Summary: This article discusses how to express the perturbative expansion of general gauge theories in terms of gauge invariant variables and illustrates this process with specific examples. The perturbation lemma provides an algorithmic procedure to determine the higher corrections of the gauge invariant variables.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Review
Physics, Multidisciplinary
G. Manolakos, P. Manousselis, D. Roumelioti, S. Stefas, G. Zoupanos
Summary: The article first reviews the theories in three and four dimensions, then details the construction of fuzzy gravity theories in three and four dimensions based on matrix models.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Particles & Fields
Nabamita Banerjee, Karan Fernandes, Arpita Mitra
Summary: The study explores the impact of electromagnetic interactions on classical soft theorems on asymptotically AdS backgrounds in 4 spacetime dimensions, revealing the perturbative corrections of 1/l(2) to known asymptotically flat spacetime soft factors. The leading soft factor is expected to be universal and applicable beyond tree level, enabling the derivation of a 1/l(2) corrected Ward identity based on the equivalence between large gauge Ward identities and soft theorems in asymptotically flat spacetimes.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Adrien Fiorucci, Romain Ruzziconi
Summary: The gravitational charge algebra of generic asymptotically locally (A)dS spacetimes is derived in n dimensions without further boundary conditions, resulting in finite expressions after removing divergences using holographic renormalization procedure. The charges associated with boundary diffeomorphisms are generally non-vanishing, non-integrable, and not conserved, while those associated with boundary Weyl rescalings are non-vanishing only in odd dimensions, with a field-dependent 2-cocycle present. The analysis is specialized to different boundary conditions, such as Dirichlet boundary conditions and leaky boundary conditions, leading to various results such as the Brown-Henneaux central extension and the Lambda-BMS asymptotic symmetry group. In the flat limit, the asymptotic symmetry group contracts to the BMS group in n dimensions.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Evgeny Buchbinder, Benjamin J. Stone
Summary: In this study, the mixed three-point correlation functions of the supercurrent and flavor current in three-dimensional 1 <= N <= 4 superconformal field theories were examined. The results showed that only parity-even structures appeared in the correlation functions, and it was also found that supersymmetry forbids parity-odd structures in three-point functions involving the supercurrent and flavor current multiplets.
Article
Physics, Particles & Fields
Kyoungho Cho, Kwangeon Kim, Kanghoon Lee
Summary: The paper introduces a novel off-shell recursion and graviton current for gravity in perturbative double field theory. By utilizing the perturbiner method, the graviton off-shell recursion is derived from the equations of motion for perturbative DFT, leading to explicit graviton off-shell currents. The classical double copy and KLT relation for gravity are discussed with insights into off-shell conservation of currents for nonlinear gauge choices.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Marc Geiller, Christophe Goeller, Nelson Merino
Summary: In three-dimensional gravity, there are two layers of dualities between diffeomorphisms and a notion of dual diffeomorphisms, as well as between first order curvature and torsion. These dualities are elegantly revealed when studying the Mielke-Baekler Lagrangian. Within each sector of the torsion/curvature duality, there exists a well-defined notion of dual diffeomorphism, forming a centerless double Virasoro algebra along with the usual diffeomorphisms.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Ali Seraj
Summary: Brans-Dicke theory's breathing mode leads to memory effects related to symmetry principles, as well as to the dual gauge theory and asymptotic symmetries.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Joydeep Chakravarty, Diksha Jain, Akhil Sivakumar
Summary: In this paper, we study the holography of information principle in a linearized setting about empty flat space and formulate it using Dirac brackets between boundary Hamiltonian and bulk operators. We find that, unlike in linearized massless gravity, the Dirac bracket of the relevant boundary observable with bulk operators vanishes in massive gravity, preventing the extraction of bulk information. We also argue that the lack of diffeomorphism invariance in massive gravity obscures the connection between local bulk operators and boundary observables, as reflected in the analysis of evaporating black holes in the islands proposal.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Review
Astronomy & Astrophysics
George Manolakos, Pantelis Manousselis, Danai Roumelioti, Stelios Stefas, George Zoupanos
Summary: This review revisits the recent research on matrix models for describing the gravitational interaction on noncommutative spaces. Inspired by the gauge-theoretic approach of ordinary gravity, the researchers modified the suggested methodology for the noncommutative framework to formulate the gauge theory. By using a covariant four-dimensional fuzzy space, they extended the gauge group to account for noncommutativity. Through symmetry breaking, they obtained an action that describes the minimal noncommutative extension.
Article
Physics, Particles & Fields
J. Fernando Barbero G, Marc Basquens, Bogar Diaz, Eduardo J. S. Villasenor
Summary: We investigate the internally abelianized versions of gravitational theories and their possible interaction terms. In models of 2+1 and 3+1 dimensions, we find that some actions are inconsistent with their abelianized versions while others are consistent. This suggests a potential approach to quantizing Euclidean general relativity.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
H. Adami, A. Parvizi, M. M. Sheikh-Jabbari, V. Taghiloo, H. Yavartanoo
Summary: We study 3-dimensional gravity on a spacetime bounded by a generic 2-dimensional causal surface. We review the solution phase space specified by 4 generic functions over the causal boundary, construct the symplectic form over the solution space and the 4 boundary charges and their algebra. The boundary charges label boundary degrees of freedom. Three of these charges extend and generalize the Brown-York charges to the generic causal boundary, are canonical conjugates of boundary metric components and naturally give rise to a fluid description at the causal boundary. Moreover, we show that the boundary charges besides the causal boundary hydrodynamic description, also admit a thermodynamic description with a natural (geometric) causal boundary temperature and angular velocity. When the causal boundary is the asymptotic boundary of the 3d AdS or flat space, the hydrodynamic description respectively recovers an extension of the known conformal or conformal-Carrollian asymptotic hydrodynamics. When the causal boundary is a generic null surface, we recover the null surface thermodynamics of [1] which is an extension of the usual black hole thermodynamics description.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Evgeny Skvortsov, Richard Van Dongen
Summary: There is a natural L-infinity-algebra or Q-manifold associated with any (gauge) field theory. Perturbatively, it can be obtained by reducing the L-infinity-algebra behind the jet space BV-BRST formulation to its minimal model. We construct the minimal models of self-dual Yang-Mills and self-dual gravity theories explicitly, which also represent their equations of motion as Free Differential Algebras. The minimal model contains all relevant information about the field theory, such as actions, charges, anomalies, and can be understood in terms of the corresponding Q-cohomology.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Stefan Hollands, Aron D. Kovacs, Harvey S. Reall
Summary: This article investigates the second law of black hole mechanics in gravitational theories with higher derivative terms. The author describes a method for defining an entropy that satisfies the second law to linear and quadratic orders in perturbations, treating the higher derivative terms as effective field theory. Additionally, the author addresses some outstanding issues with the method, such as gauge invariance and its relation to the Iyer-Wald entropy.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Multidisciplinary Sciences
Roberto Percacci
Summary: This review discusses the similarities and differences between classical gravity and other known interactions. The low energy effective field theory of gravity is related to a non-linearly realized symmetry, similar to strong interactions. Additionally, like electroweak interactions, gravity is a gauge theory in Higgs phase with a massive connection. The possibility of finding a UV complete quantum field theoretic description for all interactions is also explored.
Article
Astronomy & Astrophysics
Ermis Mitsou, Giuseppe Fanizza, Nastassia Grimm, Jaiyul Yoo
Summary: Analytical computations in relativistic cosmology involve time evolution and observable reconstruction, which can be combined into a single computation in light-cone coordinates. This approach allows for a direct link between initial conditions and observables, bypassing the need for FLRW coordinates and providing good control over the geometrical interpretation of the involved quantities. Additionally, implementing statistical homogeneity on stochastic fluctuations is possible despite the coordinate system privileging the observer world-line.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Astronomy & Astrophysics
Sebastian Garcia-Saenz
Summary: Our analysis shows that coupling between vector fields described by the generalized Proca class of theories and a gravitational sector defined by a scalar-tensor theory of the degenerate type leads to the loss of at least one constraint associated with the scalar-tensor sector.
Article
Astronomy & Astrophysics
Lam Hui, Austin Joyce, Riccardo Penco, Luca Santoni, Adam R. Solomon
Summary: This article investigates the tidal response of asymptotically flat black holes in general relativity and finds that the response is zero due to the linear symmetries governing static perturbations around the black holes. These symmetries have a geometric origin and a ladder structure that can be used to construct the complete set of solutions and derive their general properties. It is shown that solutions spontaneously break the symmetries when they decay with radius and respect the symmetries when they are regular at the horizon. These properties imply that tidal response coefficients, including Love numbers, vanish, which is consistent with the absence of black holes with linear hair. Furthermore, the manifestation of these symmetries in the effective point particle description of a black hole is discussed, demonstrating that couplings associated with non-trivial tidal response and scalar hair must vanish for the symmetries to be preserved.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Claudia de Rham, Sebastian Garcia-Saenz, Lavinia Heisenberg, Victor Pozsgay
Summary: Proca-Nuevo is a non-linear theory of a massive spin-1 field that can be extended by adding operators from the Generalized Proca class. This extension maintains the primary constraint necessary for consistency and allows for interpolation between Generalized Proca operators and Proca-Nuevo ones. When mixed with gravity, the constraint is broken in a Planck scale suppressed way. The theory can be covariantized in models that allow for consistent and ghost-free cosmological solutions, and it accurately describes the dynamics and dispersion relations of perfect fluid matter. Specific solutions exhibit hot Big Bang scenarios with a late-time self-accelerating epoch, where gravitational waves behave similarly to General Relativity.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Ermis Mitsou, Jaiyul Yoo
Summary: This letter explores the effects of spatial gauge on bispectra in single-field inflationary models. The authors compute the variation of bispectra under a general spatial gauge transformation and derive a generalization of the consistency relations in the squeezed configuration. They find that the transformation only affects cases where the long mode is a scalar at leading order in the long wave-number.
Article
Physics, Particles & Fields
James Bonifacio, Kurt Hinterbichler, Austin Joyce, Diederik Roest
Summary: This study examines certain aspects of the special galileon and DBI theories in curved space. For the special galileon theory, a new compact expression for its Lagrangian in de Sitter space is discovered, along with a field redefinition that relates it to the previous, more complex formulation. This field redefinition simplifies into the well-studied galileon duality redefinition in the flat space limit. For the DBI theory in de Sitter space, the brane and dilaton formulations are discussed and strong evidence is presented to suggest that they are related by a field redefinition. Additionally, an interpretation of the symmetries of these theories in terms of broken diffeomorphisms of de Sitter space is provided.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Sebastian Garcia-Saenz, Aaron Held, Jun Zhang
Summary: This study investigates perturbations of massive and massless vector fields on a Schwarzschild black-hole background, with a focus on non-minimal coupling between the vector field and the curvature. The quasi-normal mode spectrum of the vector field is determined, and solutions corresponding to quasi-bound states and static configurations are considered.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Ermis Mitsou, Jaiyul Yoo
Summary: In cosmology, new types of coordinate transformations have emerged, which introduce ambiguity in cosmological modeling. However, this ambiguity is irrelevant for comparing models with observations, as the cosmological observable relations are invariant under all these transformations. It is important to consider all relativistic contributions to observables, which is not commonly done in the literature.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Astronomy & Astrophysics
Jaiyul Yoo, Nastassia Grimm, Ermis Mitsou
Summary: This study investigates the three-point correlation function of observed matter density fluctuations in a squeezed triangular configuration in a Lambda CDM universe under a single-field inflationary scenario. The study finds that the theoretical descriptions of galaxy bias in general relativity are incomplete due to ambiguities in spatial gauge choice, and a proper relativistic description of galaxy bias is needed for definitive conclusions in galaxy clustering. Additionally, it demonstrates that gauge-invariant calculations of cosmological observables are unaffected by extra coordinate transformations and that relativistic effects associated with light propagation cancel each other.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Austin Joyce, Alberto Nicolis, Alessandro Podo, Luca Santoni
Summary: The text discusses the subtleties of renormalization that arise when deriving a low-energy effective action by integrating out heavy fields of a more complete theory. It provides a concrete example of applying this method to derive the U(1) Goldstone low-energy effective theory and the one-loop equation of state for the superfluid phase of (complex) phi(4). Additionally, it analyzes a renormalizable scalar SO(N) theory at finite chemical potential, demonstrating the absence of the original SO(N) symmetry in the effective theory for the gapless Goldstone.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Daniel Baumann, Wei-Ming Chen, Carlos Duaso Pueyo, Austin Joyce, Hayden Lee, Guilherme L. Pimentel
Summary: This paper studies rational correlators, including those of gauge fields, gravitons, and the inflaton. By analytic continuation, using the constraints of unitarity and recursion relations, the singularities of correlators can be revealed, and the full correlators can be efficiently bootstrapped in flat space.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Lam Hui, Austin Joyce, Riccardo Penco, Luca Santoni, Adam R. Solomon
Summary: We study the near-zone symmetries of a massless scalar field on four-dimensional black hole backgrounds and provide a geometric understanding that unifies various recently discovered symmetries as part of an SO(4, 2) group. A subset of these symmetries corresponds to the static sector and leads to the ladder symmetries responsible for the vanishing of Love numbers. We compare different near-zone approximations in the literature for the Kerr case and focus on the implementation that retains the symmetries of the static limit. We also describe the relation to spin-1 and 2 perturbations.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Sebastian Garcia-Saenz, Lucas Pinol, Sebastien Renaux-Petel, Denis Werth
Summary: We demonstrate that the contribution of the primordial trispectrum to the scalar-induced stochastic gravitational wave background is limited in conventional inflationary scenarios. Scale-invariant theories with regular or local trispectrum shapes cannot significantly contribute due to their smallness compared to the relative one-loop correction of the scalar power spectrum. Additionally, a toy model for a scale-dependent scalar spectrum confirms the robustness of our no-go result.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Particles & Fields
Kurt Hinterbichler, Diego M. Hofman, Austin Joyce, Gregoire Mathys
Summary: We study effective field theories (EFTs) with biform symmetries, characterized by conserved electric current and, in certain cases, a topological magnetic current with an anomalous conservation law. We prove that the mixed anomaly uniquely determines the two-point function between the electric and magnetic currents, and show the presence of a massless mode protected by the anomaly. Additionally, the anomaly leads to a universal form of the EFT dominated by a relevant term resembling the linear Einstein action.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Particles & Fields
Noah Bittermann, Austin Joyce
Summary: We study the structure of the flat space wavefunctional in scalar field theories with nonlinearly realized symmetries. These symmetries imply soft theorems that are satisfied by wavefunction coefficients in the limit where one of the external momenta is scaled to zero. We combine these soft theorems with information about the singularity structure of the wavefunction to bootstrap the wavefunction coefficients of these theories, and systematize this construction through recursion relations.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
