Article
Astronomy & Astrophysics
R. Maluf, Juliano C. S. Neves
Summary: This work introduces black hole solutions with a cosmological constant in bumblebee gravity, where the nonzero vacuum expectation value of the bumblebee field leads to Lorentz symmetry violation. These solutions are spherically symmetric black holes with an effective cosmological constant, supported by an anisotropic energy-momentum tensor. The study calculates the shadow angular radius for the proposed black hole solution, establishing a relationship between the bumblebee field and the shadow angular size for the first time.
Article
Astronomy & Astrophysics
Mihailo Dordevic, Tijana Radenkovic, Pavle Stipsic, Marko Vojinovic
Summary: When discussing gauge symmetries of any theory, the triviality of Henneaux-Teitelboim transformations on-shell often leads to their underappreciation or complete ignorance. However, these gauge transformations are crucial in understanding the structure of the full gauge symmetry group, particularly with regard to the subgroup of diffeomorphisms. The review focuses on the Henneaux-Teitelboim transformations and resulting gauge group in the general case, as well as their role in the applications to nBF models, relevant for higher gauge theories and quantum gravity constructions.
Article
Physics, Particles & Fields
Sylvain Carrozza, Philipp A. Hohn
Summary: We introduce a general framework for realizing edge modes as dynamical reference frames in gauge field theory, providing an explicit interpretation. By isolating the subsector of the global theory compatible with gauge-invariant boundary conditions for dynamics in a bounded region, we establish consistent variational principles and boundary actions. The resulting dynamics for the subregion manifest as edge modes, which are influenced by boundary symmetries.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Enore Guadagnini, Federico Rottoli, Frank Thuillier
Summary: This paper discusses topological gauge theories in three dimensions defined by metric-independent Lagrangians. It has been claimed that the functional integration necessarily depends nontrivially on the gauge-fixing metric. However, this paper demonstrates that the partition function and the mean values of the gauge-invariant observables do not really depend on the gauge-fixing metric.
MODERN PHYSICS LETTERS A
(2022)
Article
Physics, Particles & Fields
Chikun Ding, Yu Shi, Jun Chen, Yuebing Zhou, Changqing Liu, Yuehua Xiao
Summary: In this study, an exact rotating BTZ-like black hole solution is obtained by solving the gravitational field equations and bumblebee motion equations. The Lorentz symmetry is violated only in the radial direction and requires a linear functional potential for the bumblebee field. The black hole has two horizons and an ergosphere, which depend on the bumblebee coupling constant. The entropy-area relation, first law of thermodynamics, and Smarr formula can still be established in this LV spacetime due to the coupling between the bumblebee field and the Ricci tensor.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Particles & Fields
Pablo Mora
Summary: I discuss how the factorization of the invariant trace used to define Chern-Simons branes introduces new relationships between the coupling constants of extended objects of diverse dimensions in a space-time with a Chern-Simons action for a space-time group. The suitable choice of these coupling constants results in an enhanced gauge invariance due to an extension of the Inflow mechanism. I also comment on the potential relevance of these models in fundamental physics.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Physics, Multidisciplinary
Xiaoyang Huang
Summary: We present effective field theories for dipole symmetric topological matters described by the Chern-Simons theory. Our framework includes both U(1) and dipole gauge fields, enabling only the highest multipole symmetry to support the 't Hooft anomaly. We demonstrate that the dipolar Chern-Simons theory can exist in any dimension with appropriate point group symmetries, and the bulk-edge correspondence can depend on the boundary. Additionally, we propose an analogy between the dipole anomaly and the torsional anomaly, as well as generalize particle-vortex duality to dipole phase transitions. Our framework can also couple dipole symmetry to curved spacetime, leading to a proposal for anomalous dipole hydrodynamics. Furthermore, we show that the fracton-elasticity duality naturally arises from a non-abelian Chern-Simons theory in 3D.
Article
Astronomy & Astrophysics
Pedro D. S. Silva, Leticia Lisboa-Santos, Manoel M. Ferreira, Marco Schreck
Summary: In this study, we investigate the effects of CPT-odd Maxwell-Carroll-Field-Jackiw (MCFJ) electrodynamics and its dimension-5 extension on the optical activity of continuous media. The results show that refractive indices and propagation modes exhibit diversity under different background conditions, with richer phenomenology observed in the higher-derivative model. These findings have implications for Weyl semimetals.
Article
Astronomy & Astrophysics
Nikhil Karthik, Rajamani Narayanan
Summary: This paper reviews the derivation of the Overlap fermion formalism in a torus of three space-time dimensions, and demonstrates how to construct different continuum topological gauge actions using the Overlap fermion determinants. Numerical simulations show that the lattice formalism accurately reproduces the continuum expectations under specific background fields.
Article
Physics, Multidisciplinary
Taro Kimura, Fabrizio Nieri
Summary: By studying 5d supersymmetric gauge theories with unitary groups in the omega background and intersecting defects, we reveal the relationship between instanton and generalized vortex calculus. In a simplified scenario, we identify the dual supergroup theory for intersecting defects as the supergroup version of refined Chern-Simons theory via open/closed duality.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2021)
Article
Physics, Particles & Fields
Junho Hong, James T. Liu
Summary: The sub-leading structures of the free energy in N = 3 Chern-Simons-matter quiver gauge theories with gauge group U(N)(r) (r >= 2) were investigated using saddle point approximation and ideal Fermi-gas model for computing the partition function. A comparison of the resulting expressions for the free energy suggested a potential universal 1/6 log N correction. The study also indicated a connection between the sub-leading correction of the planar free energy in the large 't Hooft parameter limit and higher-derivative corrections to the tree-level holographic dual free energy in massive Type IIA theory.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Mathematics
Sergey Grigorian
Summary: This paper studies the properties of smooth loops and their associated tangent algebras, including a loop analog of the Maurer-Cartan equation, expanding on Lie groups. It introduces a loop bundle as an associated bundle to a particular principal bundle, defines the torsion of a loop bundle structure based on a connection on the principal bundle, and explores aspects of non-associative gauge theory. The paper illustrates how some properties of G(2)-structures can be understood from this more general setting.
ADVANCES IN MATHEMATICS
(2021)
Article
Physics, Particles & Fields
Sohan Kumar Jha, Anisur Rahaman
Summary: The study explores Lorentz violation in the bumblebee gravity model and its effects on shadow features and radiation emission rate in rotating black hole spacetime.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Mathematics, Applied
Jishan Fan, Tohru Ozawa
Summary: In this study, we establish uniform-in-epsilon regularity estimates for local strong solutions to the Chern-Simons-Schrodinger equations in R-2. We then demonstrate the global well-posedness of strong solutions to the limit problem when epsilon equals zero.
Article
Astronomy & Astrophysics
Caroline P. Felix, Chung Wen Kao
Summary: In this paper, the authors solve the gap equation of the Yang-Mills-Gribov-Zwanziger-Chern-Simons theory by considering the first order in the Chern-Simons topological mass term. Three possible solutions to the gap equation are found, with two of them being eliminated by the regime of the theory. The study also concludes that there is no weak-coupling regime in this case.
Article
Astronomy & Astrophysics
R. Casana, J. S. Rodrigues, F. E. P. dos Santos
Article
Physics, Particles & Fields
Chikun Ding, Changqing Liu, R. Casana, A. Cavalcante
EUROPEAN PHYSICAL JOURNAL C
(2020)
Article
Optics
Pedro D. S. Silva, Rodolfo Casana, Manoel M. Ferreira
Summary: The effects of extended constitutive relations on the propagation of waves in bi-isotropic and bi-anisotropic media are investigated using a classical general approach. The study considers different magnetoelectric parameters represented by symmetric and antisymmetric tensors and evaluates the refractive indices, propagation modes, and anisotropy/birefringence effects. The findings provide insights into the identification of the type of bi-anisotropic medium examined and discuss energy propagation in these anisotropic media.
Article
Astronomy & Astrophysics
V Almeida, R. Casana, E. da Hora, S. Krusch
Summary: We investigate the existence of vortex configurations in two gauged-CP(2) models extended via the inclusion of magnetic impurities. The study shows that these configurations possess a self-dual structure and exhibit quantized characteristics in terms of total energy and electric charge when coupled to the Maxwell term or the Chern-Simons action. Furthermore, the introduction of a Gaussian-type impurity leads to nonmonotonic solutions in the self-dual equations.
Article
Astronomy & Astrophysics
Rodolfo Casana, Andre C. Santos
Summary: The study introduces self-dual (topological) solitons in a gauged version of the baby Skyrme model with the Born-Infeld term governing the gauge field dynamics. By successfully implementing the Bogomol'nyi-Prasad-Sommerfield formalism, the study establishes a lower bound for energy and respective self-dual equations with solutions saturating such limit. The energy lower bound is quantized and proportional to the topological charge of the Skyrme field, while the total magnetic flux remains nonquantized.
Article
Astronomy & Astrophysics
Rodolfo Casana, Andre C. Santos, M. L. Dias
Article
Astronomy & Astrophysics
Rodolfo Casana, Andre C. Santos, Claudio F. Farias, Alexsandro L. Mota
Article
Physics, Multidisciplinary
R. Casana, N. H. Gonzalez-Gutierrez, E. da Hora
Article
Astronomy & Astrophysics
Rodolfo Casana, Andre C. Santos, Claudio F. Farias, Alexsandro L. Mota
Article
Astronomy & Astrophysics
J. Andrade, R. Casana, E. da Hora, C. dos Santos
Article
Astronomy & Astrophysics
R. Casana, M. L. Dias, E. da Hora
Article
Astronomy & Astrophysics
Rodolfo Casana, Manoel M. Ferreira, Leticia Lisboa-Santos, Frederico E. P. dos Santos, Marco Schreck
Article
Astronomy & Astrophysics
R. Casana, A. Cavalcante, F. P. Poulis, E. B. Santos
Article
Astronomy & Astrophysics
Jonas B. Araujo, Rodolfo Casana, Manoel M. Ferreira
Article
Astronomy & Astrophysics
V. Almeida, R. Casana, E. da Hora
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
