Article
Astronomy & Astrophysics
Alvaro Restuccia, Francisco Tello-Ortiz
Summary: An anisotropic model describing gravity-vector gauge coupling is proposed, based on the 4+1 dimensional non-projectable Ho.rava-Lifshitz gravity theory with a geometrical restriction. Renormalizability arguments require including interactions up to terms with z = 4 spatial derivatives on the geometrical tensor fields. The reduction to 3+1 dimensions results in a model invariant under FDiff and U(1) symmetry groups, propagating the same spectrum as the Einstein-Maxwell theory at the kinetic conformal point.
CLASSICAL AND QUANTUM GRAVITY
(2023)
Article
Physics, Particles & Fields
Alvaro Restuccia, Francisco Tello-Ortiz
Summary: This study obtained and analyzed a spherically symmetric solution of the field equations of the Horava-Lifshitz gravity-gauge vector interaction theory, describing a charged throat. The solution exists when a restriction on the relation between mass and charge is met, reducing to the Reissner-Nordstrom one as the coupling constants approach relativistic values. By introducing the correct charts, the solution can be described across the entire manifold, including the throat connecting different spacetimes.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Jan Ambjorn, Yuki Hiraga, Yoshiyasu Ito, Yuki Sato
Summary: By quantizing the two-dimensional projectable Horava-Lifshitz gravity with bi-local and spacelike wormhole interaction, we find that the resulting quantum Hamiltonian coincides with that obtained through summing over all genus in the string field theory, implying that the wormhole interaction can be interpreted as a splitting or joining interaction of one-dimensional strings.
Article
Astronomy & Astrophysics
Kyungmin Kim, John J. Oh, Chan Park, Edwin J. Son
Summary: The study revealed that neutron stars (NSs) with larger radii and heavier masses in Ho.rava-Lifshitz (HL) gravity remain stable without collapsing into black holes, showing a deviation from general relativity (GR) can change the typical features of NS structure.
Article
Astronomy & Astrophysics
Mohammad Bagher Jahani Poshteh, Robert B. Mann
Summary: The thermodynamics of z = 4 Ho.rava-Lifshitz black holes in 3 + 1 dimensions is studied in extended phase space. By using the scaling argument, the Smarr relation and the first law for the black hole solutions of z = 4 Ho.rava-Lifshitz gravity are found. It is discovered that the reverse isoperimetric inequality can be violated for certain types of horizons, leading to positive specific heat at constant pressure and volume. Two critical points are identified for z = 4 Hovara-Lifshitz black holes with hyperbolic horizons, exhibiting both Van der Waals and reverse Van der Waals behaviors.
Article
Astronomy & Astrophysics
Siddarth Ajith, Kent Yagi, Nicolas Yunes
Summary: This paper investigates the possibility of constraining the coupling constant lambda in Horava-Lifshitz gravity theory through neutron star observations. By constructing slowly-rotating and weakly tidally-deformed neutron stars and analyzing the results, it is found that the moment of inertia of neutron stars is independent of lambda, while tidal deformations are affected by khronometric gravity.
Article
Astronomy & Astrophysics
G. S. Vicente
Summary: This study considers classical and quantum Friedmann-Lemaitre-Robertson-Walker universes filled with noninteracting radiation and dust fluids within the framework of Horava-Lifshitz gravity theory. Analytical solutions for nonsingular quantum bounce and cyclic universes for open and closed spatial sections in terms of the parameters of Horava-Lifshitz theory were found. The Horava-Lifshitz theory was applied in its projectable version without the detailed balance condition, and canonical quantization was performed in the Wheeler-DeWitt approach of quantum cosmology for a minisuperspace model.
Article
Physics, Particles & Fields
Hongbo Cheng
Summary: This study investigates the Casimir force for parallel plates at finite temperature in the Horava-Lifshitz (HL) theory. It is found that the HL exponent cannot be chosen as an integer, otherwise the Casimir energy will be a constant, resulting in the disappearance of Casimir force between two parallel plates. Higher temperature weakens the attractive Casimir force, which is consistent with previous theoretical and experimental results. By appropriately selecting the HL factor, a thermally revised Casimir force similar to the standard results for parallel plates can be obtained.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Multidisciplinary
Behnam Pourhassan, Izzet Sakalli
Summary: This paper investigates the thermodynamics of the Horava-Lifshitz black hole at quantum scales, focusing on the non-perturbative quantum correction. The study reveals that the stability of different solutions, such as Kehagius-Sfetsos and Lu-Mei-Pop, is affected differently by the non-perturbative quantum correction. The Lu-Mei-Pop solution remains stable in the presence of the correction.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Astronomy & Astrophysics
Celia Escamilla-Rivera, Hernando Quevedo
Summary: Proposing an alternative cosmography using Horava-Lifshitz gravity as a model for quantum gravity, the study suggests that the Universe appears flat classically according to the ΛCDM model, but is actually curved from a quantum perspective. The findings indicate a non-flat scenario and a specific value for the Horava parameter that could be interpreted as a measure of a quantum effect.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Astronomy & Astrophysics
Hiroki Matsui, Shinji Mukohyama, Atsushi Naruko
Summary: The study shows that in many gravitational theories, the DeWitt wave function does not have the desired form when tensor perturbations are taken into account, but Hofava-Lifshitz gravity provides a satisfactory solution, especially an exact analytic expression for the DeWitt wave function of the universe with scale-invariant perturbations can be found in the limit of z = 3 anisotropic scaling.
Article
Physics, Multidisciplinary
J. Furtado, J. F. Assuncao, A. C. A. Ramos
Summary: This paper investigates the corrections from a Horava-Lifshitz extension of the complex scalar sector to Bose-Einstein condensation and thermodynamics parameters. The computations were done by analyzing the generating functional and extracting the thermodynamics parameters, including the Lifshitz scaling correction for the critical temperature T-c.
Article
Astronomy & Astrophysics
Hugo Garcia-Compean, Daniel Mata-Pacheco
Summary: This study investigates the vacuum transition probabilities for a Friedmann-Lemaitre-Robertson-Walker universe with positive curvature in Horava-Lifshitz gravity, considering the presence of a scalar field potential. The Hamiltonian approach to the Wheeler-DeWitt equation is used to compute the transition probabilities. The study provides analytic expressions for the transition probabilities in two scenarios and discusses the infrared and ultraviolet limits in comparison to general relativity. Phenomenological implications, including a potential resolution of the initial singularity, are briefly discussed.
Article
Astronomy & Astrophysics
Ewa Czuchry
Summary: The standard ΛCDM model has unresolved issues like the initial singularity, which require modifications to general relativity. However, the Horava-Lifshitz theory offers an alternative with a bounce of the universe instead of an initial singularity. This review discusses previous works on the stability of this bounce in different formulations of the HL theory.
Article
Astronomy & Astrophysics
Paul Martens, Hiroki Matsui, Shinji Mukohyama
Summary: In this paper, we introduce a well-tempered DeWitt wave function that vanishes at the classical big-bang singularity in Horava-Lifshitz (HL) cosmology. Through analytical and numerical methods, we demonstrate that in HL gravity, the DeWitt wave function for tensor perturbation is well-defined at the singularity and behaves well up to the finite size of the Universe.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Nicola Dondi, Ioannis Kalogerakis, Domenico Orlando, Susanne Reffert
Summary: In studying the O(2N) model at criticality in three dimensions, researchers found the large-charge expansion to be an asymptotic series, and used resurgence techniques to investigate non-perturbative corrections and extend the validity of the effective field theory (eft) to any charge value. They also conjectured the general form of the non-perturbative behavior of conformal dimensions for any N value, showing good agreement with previous lattice data.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
Simeon Hellerman, Shunsuke Maeda, Domenico Orlando, Susanne Reffert, Masataka Watanabe
Summary: In this study, the ratio of pairs of adjacent correlators of Coulomb-branch operators in SU(2) N = 2 sqcd with four flavors was investigated within the large quantum number expansion framework. Utilizing the order-by-order S-duality invariance of the large-R-charge expansion, the dependence of the leading large- behavior on the marginal coupling tau was computed ab initio, showing excellent agreement with numerical estimates from localization.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Domenico Orlando, Susanne Reffert, Tim Schmidt
Summary: We discuss the O(2N) vector model in three dimensions. By working in a double-scaling limit of large N and large charge, we are able to study the model away from the critical point and track the RG flow from the UV to the IR. The crucial observation is that the effective potential, at leading order in N but exact to all orders in perturbation theory, is the Legendre transform of the grand potential at fixed charge.
Article
Physics, Particles & Fields
Rafael Moser, Domenico Orlando, Susanne Reffert
Summary: In this note, we discuss the phase space of the O(2N) vector model with a quadratic and a quartic interaction. By using large charge methods, we write the large-N effective potential in dimensions 2 < D < 4 and 4 < D < 6. Based on a simple discussion of the convexity properties of the grand potential, we find that the behavior of the model is very different in the two regimes. In the regime 2 < D < 4, the theory is well-behaved, while in the regime 4 < D < 6, the model leads to a complex CFT in the UV, consistent with previous results. Additionally, we discover a new metastable massive phase in the high-energy regime of the theory on the cylinder.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Simeon Hellerman, Domenico Orlando, Vito Pellizzani, Susanne Reffert, Ian Swanson
Summary: This study examines the conformal dimensions of charge-Q operators in nonrelativistic conformal field theories from the perspective of the non-linear sigma model. It discusses the renormalization of edge divergences and computes the one-loop Q(0)log Q contribution to the ground-state energy in 3 spatial dimensions.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Nicola Dondi, Ioannis Kalogerakis, Rafael Moser, Domenico Orlando, Susanne Reffert
Summary: We systematically study the correlators of a generic conformal field theory with a global O(2) symmetry in a sector of large global charge. Our focus is on three-and four-point correlators with conserved current insertions sandwiched between spinful excited states corresponding to phonons over the large-charge vacuum. We also discuss loop corrections to the scaling dimensions and observe the presence of multiple logarithms in even dimensions.
Article
Astronomy & Astrophysics
Thiago Araujo, Omar Celikbas, Domenico Orlando, Susanne Reffert
Summary: In this study, we examine two-dimensional conformal field theories with large global charge. We find that the large-charge sector can be used in a double-scaling limit, and investigate the general features of the spectrum of models that can be described by a nonlinear sigma model in a Wentzel-Kramers-Brillouin approximation.
Article
Astronomy & Astrophysics
Domenico Orlando, Susanne Reffert, Francesco Sannino
Summary: This study investigates the properties of near-conformal dynamics in a large charge region approaching the lower boundary of the conformal window from the chirally broken phase, using the example of SU(2) color theory and the chirally broken phase to study the impact of charge and dependence on the fermion mass term.
Article
Astronomy & Astrophysics
Domenico Orlando, Vito Pellizzani, Susanne Reffert
Summary: This paper discusses a nonrelativistic system at large charge where Schrodinger symmetry is slightly broken by an explicit mass term for the dilaton field, nonlinearly realizing nonrelativistic scale invariance. The large-charge formalism is developed from the linear sigma model perspective, identifying a root Q log Q term as a signature of the explicit breaking, which can be distinguished from effects coming from breakdown of the EFT at the edge of the particle cloud over a large range of orders of magnitude.
