Papers@20230813

High Energy Physics - Theory

[2308.03663] A Background Independent Algebra in Quantum Gravity https://arxiv.org/abs/2308.03663

Edward Witten

We propose an algebra of operators along an observer's worldline as a background-independent algebra in quantum gravity. In that context, it is natural to think of the Hartle-Hawking no boundary state as a universal state of maximum entropy, and to define entropy in terms of the relative entropy with this state. In the case that the only spacetimes considered correspond to de Sitter vacua with different values of the cosmological constant, this definition leads to sensible results.

[2308.04027] Feynman geometry https://arxiv.org/abs/2308.04027

General Relativity and Quantum Cosmology

[2308.05392] Spinning magnetized particles orbiting magnetized Schwarzschild black holes https://arxiv.org/abs/2308.05392

[2308.04692] Conformal geodesics and the evolution of spacetimes with positive Cosmological constant https://arxiv.org/abs/2308.04692

Mathematical Physics

[2308.03731] Quasi-classical approximation of monopole harmonics https://arxiv.org/abs/2308.03731

High Energy Physics - Phenomenology

[2308.05375] Electron $g-2$ corrections from axion dark matter https://arxiv.org/abs/2308.05375

Papers@20230806

High Energy Physics - Theory

[2307.15900] JT Gravity in de Sitter Space and the Problem of Time
https://arxiv.org/abs/2307.15900

[2308.00875] String Field Theory
https://arxiv.org/abs/2308.00875

Note: Review article for Oxford Research Encyclopedia of Physics 

[2307.16624] Fermions with $SU(1,n)$ Spacetime Symmetry
https://arxiv.org/abs/2307.16624

Quantum Physics

[2307.15426] Relativistic Covariance of Scattering
https://arxiv.org/abs/2307.15426

[2308.01166] Jordan Decomposition of Non-Hermitian Fermionic Quadratic Forms
https://arxiv.org/abs/2308.01166

Shunta Kitahama, Ryo Toyota, Hironobu Yoshida, Hosho Katsura

General Relativity and Quantum Cosmology

[2104.06848] Electromagnetic potentials in curved spacetimes
https://arxiv.org/abs/2104.06848

[gr-qc/9704059] Gravito-electromagnetism
https://arxiv.org/abs/gr-qc/9704059

Papers@20230728

hep-ph

[2307.13003] Quantum GravitoElectromagnetic Dynamics
https://arxiv.org/abs/2307.13003

Papers@20230721

0. はじめに

1. hep-th

[2307.06286] Entanglement Entropy and Algebra in Quantum Field Theory
https://arxiv.org/abs/2307.06286

☆
This essay is submitted for the degree of Master of Advanced Study in Mathematics 2023

[2307.08503] Geodesics motion of test particles around Schwarzschild-Klinkhamer wormhole with topological defects and gravitational lensing
https://arxiv.org/abs/2307.08503

[2307.10345] Towards a unitary formulation of quantum field theory in curved space-time II: the case of Schwarzschild black hole
https://arxiv.org/abs/2307.10345

2. gr-qc

[2104.01593v1] Electron-photon interaction in de Sitter ambient space formalism
https://arxiv.org/abs/2104.01593v1

☆

\ F. Jalilifard, Y. Ahmadi, M. V. Takook

[Submitted on 4 Apr 2021]

The electron-photon interaction (the spinor-vector field interaction) in the de Sitter ambient space formalism is investigated in the first (leading order) approximation. The interaction Lagrangian and the scattering matrix are presented. In this approximation, the scattering matrix can be written as a expansion of the interaction Lagrangian. The tree-diagram of electron-photon scattering amplitude is calculated. Finally the Minkowski limit is considered.

[2307.08108] De Sitter-Invariant Black Holes
https://arxiv.org/abs/2307.08108

[2307.09632v1] General Formalism of the Quantum Equivalence Principle
https://arxiv.org/abs/2307.09632v1

[2307.10199v1] New solution of Einstein-Yang-Mills equations
https://arxiv.org/abs/2307.10199v1

[2307.10970] Maxwell-Dirac system in cosmology
https://arxiv.org/abs/2307.10970

[2307.03830] 3d Quantum Gravity Partition Function at 3 Loops: a brute force computation
https://arxiv.org/abs/2307.03830

[2307.06690] Anti-de Sitterian "massive" elementary systems and their Minkowskian and Newtonian limits
https://arxiv.org/abs/2307.06690

[2307.00010] A review of the geometrical thermodynamics and its application to black holes
https://arxiv.org/abs/2307.00010

[2307.05367] Minimal Lengths in 3D via the Generalized Uncertainty Principle
https://arxiv.org/abs/2307.05367

3. その他

今週はその他は

n. おわりに

Papers@20230712

High Energy Physics - Theory

[2307.04929] Dual CFT on Nariai limit for Kerr-Newman-dS and Kerr-Sen-dS black holes
https://arxiv.org/abs/2307.04929

[2307.03830] 3d Quantum Gravity Partition Function at 3 Loops: a brute force computation
https://arxiv.org/abs/2307.03830

General Relativity and Quantum Cosmology

[2307.04800] Quantum thermodynamics of de Sitter space
https://arxiv.org/abs/2307.04800

[2307.04743] Geometric post-Newtonian description of massive spin-half particles in curved spacetime
https://arxiv.org/abs/2307.04743

[2307.05243] Inconsistency with De Sitter Spacetime of "Gravitational Pair Production and Black Hole Evaporation"
https://arxiv.org/abs/2307.05243

Mathematical Physics

[2307.04666] Phase space for gravity with boundaries
https://arxiv.org/abs/2307.04666

[2307.05001] The Riemannian curvature identities on Almost Complex Calabi-Yau manifolds with torsion
https://arxiv.org/abs/2307.05001

Papers@20230711

High Energy Physics - Theory

[2307.01841] Traces and Time: a de Sitter Black Hole correspondence
https://arxiv.org/abs/2307.01841

[2307.01274] Supersymmetric localization of (higher-spin) JT gravity: a bulk perspective
https://arxiv.org/abs/2307.01274

[2307.01254] Riemann zeros as quantized energies of scattering with impurities
https://arxiv.org/abs/2307.01254

We construct a physical model of a single particle interacting with impurities spread on a circle, where the quantized energies coming from a Bethe Ansatz equation correspond to the non-trivial zeros of the Riemann ζ-function.

General Relativity and Quantum Cosmology

[2307.02589] The Motion of Test Bodies around Kerr Black Holes
https://arxiv.org/abs/2307.02589

Doctoral thesis

[2307.02567] Spin as a probe of axion physics in general relativity
https://arxiv.org/abs/2307.02567

Mathematical Physics

Only bookmarks.

Papers@20230703

General Relativity and Quantum Cosmology

[2306.15453] Spherical particle orbits around a rotating black hole in massive gravity
https://arxiv.org/abs/2306.15453

In this paper, we present a rotating de Rham-Gabadadze-Tolley black hole with a positive cosmological constant in massive gravity, achieved by applying a modified Newman-Janis algorithm. The black hole exhibits stable orbits of constant radii, prompting a numerical study on the behavior of the solutions to a nonic equation governing the radii of planar orbits around the black hole. Additionally, we investigate the stability of orbits near the event horizon and provide a comprehensive analytical examination of the solutions to the angular equations of motion. This is followed by simulating some spherical particle orbits around the black hole.

☆

[2306.13134] Coupling Metric-Affine Gravity to the Standard Model and Dark Matter Fermions
https://arxiv.org/abs/2306.13134

General Relativity (GR) exists in different formulations, which are equivalent in pure gravity. Once matter is included, however, observable predictions generically depend on the version of GR. In order to quantify the resulting ambiguity, we employ metric-affine gravity, which encompasses as special cases the metric, Palatini, Einstein-Cartan and Weyl formulations. We first discuss the interaction of fermions with torsion and non-metricity, also commenting on projective symmetry. With a view towards the Standard Model, we then construct a generic model of (complex) scalar, fermionic and gauge fields coupled to GR and derive an equivalent metric theory, which features numerous new interaction terms. As a first observable consequence, we point out that a gravitational mechanism for producing dark matter in the form of singlet fermions can be used to distinguish between metric gravity and other formulations of GR.

[2306.16746] Note About Canonical Formalism for Gravity with Dynamical Determinant of Metric
https://arxiv.org/abs/2306.16746

In this short note we perform canonical analysis of the theory invariant under restricted diffeomorphism so that the action contains kinetic term for determinant of metric. We find corresponding Hamiltonian and determine structure of constraints.

High Energy Physics - Theory

[2306.16810] More On Pure Gravity with a Negative Cosmological Constant
https://arxiv.org/abs/2306.16810

We identify an ambiguity in the Chern-Simons formulation of three-dimensional gravity with negative cosmological constant that originates in an outer automorphism of the Lie algebra sl(2,R). It has important consequences for the stability of the theory in a space-time with boundary. We revisit the classical equivalence of three-dimensional gravity with a boundary Liouville theory both on and off the mass shell. Moreover, we provide further details on the quantum equivalence, the gauge symmetry that renders the spectrum diagonal, as well as the relation between asymptotically AdS3 metrics and polar boundary conditions. We thus set the proposal that the Liouville conformal field theory serves as a definition of a unitary theory of pure gravity in three dimensions with negative cosmological constant on a more stable footing.

[2306.13143] Bubbles of cosmology in AdS/CFT
https://arxiv.org/abs/2306.13143

[2306.15105] Holography and Correlation Functions of Huge Operators: Spacetime Bananas
https://arxiv.org/abs/2306.15105

Quantum Physics

[2306.14625] On the relation between quantum walks and absolute zeta functions
https://arxiv.org/abs/2306.14625