Ecuadorian scientists face long prison sentences in politically charged case over COVID-19 tests

2021 ◽  
Keyword(s):  
Charged Case

scholarly journals Charged anti-de Sitter BTZ black holes in Maxwell-f(T) gravity

2018 ◽  
Vol 33 (13) ◽  
pp. 1850076 ◽  
Author(s):  
G. G. L. Nashed ◽  
S. Capozziello
Keyword(s):  
Black Holes ◽  
Special Form ◽  
Energy Content ◽  
Equations Of Motion ◽  
Main Task ◽  
Cauchy Horizon ◽  
De Sitter ◽  
Vector Form ◽  
Charged Case ◽  
General Vector

Inspired by the Bañados, Teitelboim and Zanelli (BTZ) formalism, we discuss the Maxwell-[Formula: see text] gravity in [Formula: see text] dimensions. The main task is to derive exact solutions for a special form of [Formula: see text], with [Formula: see text] being the torsion scalar of Weitzenböck geometry. To this end, a triad field is applied to the equations of motion of charged [Formula: see text] and sets of circularly symmetric noncharged and charged solutions have been derived. We show that, in the charged case, the monopole-like and the [Formula: see text] terms are linked by a correlative constant despite the known results in teleparallel geometry and its extensions.[Formula: see text] Furthermore, it is possible to show that the event horizon is not identical with the Cauchy horizon due to such a constant. The singularities and the horizons of these black holes are examined: they are new and have no analogue in the literature due to the fact that their curvature singularities are soft. We calculate the energy content of these solutions by using the general vector form of the energy–momentum within the framework of [Formula: see text] gravity. Finally, some thermodynamical quantities, like entropy and Hawking temperature, are derived.

EXACT SOLUTIONS OF THE EINSTEIN–MAXWELL EQUATIONS IN CHARGED PERFECT FLUID SPHERES FOR THE GENERALIZED TOLMAN–OPPENHEIMER–VOLKOFF EQUATIONS

2013 ◽  
Vol 22 (02) ◽  
pp. 1350009 ◽  
Author(s):  
LI ZOU ◽  
FANG-YU LI ◽  
HAO WEN
Keyword(s):  
Cosmological Constant ◽  
Exact Solutions ◽  
Perfect Fluid ◽  
Maxwell Equations ◽  
Constant Density ◽  
New Exact Solutions ◽  
First Time ◽  
Classical Constant ◽  
Fluid Spheres ◽  
Charged Case

Exact solutions of the Einstein–Maxwell equations for spherically symmetric charged perfect fluid have been broadly studied so far. However, the cases with a nonzero cosmological constant are seldom focused. In the present paper, the Tolman–Oppenheimer–Volkoff (TOV) equations have been generalized from the neutral case of hydrostatic equilibrium to the charged case of hydroelectrostatic equilibrium, and base on it, for the first time we find a series of new exact solutions of Einstein–Maxwell's equations with a nonzero cosmological constant for static charged perfect fluid spheres. Moreover, two special TOV equations and two classical constant density interior solutions are also given.

Bonnichsen v. United States: Time, Place, and the Search for Identity

2005 ◽  
Vol 12 (2) ◽  
pp. 249-263 ◽  
Author(s):  
Sarah Harding
Keyword(s):  
United States ◽  
Cultural Identity ◽  
The United States ◽  
Decision Makers ◽  
Native Hawaiians ◽  
Ninth Circuit ◽  
Court Of Appeals ◽  
Clash Of Cultures ◽  
Definition Of ◽  
Charged Case

On its surface, Bonnichsen v. United States is an administrative law case, reviewing a decision by the Secretary of the Interior regarding the appropriate reach of a specific set of legislative and regulatory rules. As such, Judge Gould, writing for a panel of the Ninth Circuit of the United States Court of Appeals (Ninth Circuit) decided that the secretary's office had overstepped its bounds; in short, its interpretation of the rules in question was not reasonable. But underneath the legal categories, Bonnichsen is a much more complicated and politically charged case. It is about competing conceptions of history and spirituality. It is about sovereignty (although that word is not uttered once in the decision, aside from reciting a definition of Native Hawaiians) and the clash of cultures. It is less about the standards for decision making and more about who the appropriate decision makers are. It is a case about a man who lived 9,000 years ago and about how today we should understand his cultural identity.

The interpretation of the C metric. The charged case whene 2 ≤m 2

1995 ◽  
Vol 27 (7) ◽  
pp. 735-749 ◽  
Author(s):  
F. H. J. Cornish ◽  
W. J. Uttley
Keyword(s):  
Charged Case

scholarly journals SPECTRA OF BLACK HOLE IN DE SITTER SPACETIME WITH HIGHLY DAMPED QUASINORMAL MODES: HIGH OVERTONE CASE

2012 ◽  
Vol 27 (23) ◽  
pp. 1250123 ◽  
Author(s):  
MOLIN LIU ◽  
XUEHUI HU ◽  
JUNWANG LU ◽  
JIANBO LU
Keyword(s):  
Black Hole ◽  
Quasinormal Modes ◽  
De Sitter Spacetime ◽  
De Sitter ◽  
Flat Spacetime ◽  
Sitter Spacetime ◽  
Spacetime Structure ◽  
Electrically Charged ◽  
High Overtone ◽  
Charged Case

Motivated by recent physical interpretation on quasinormal modes presented by Maggiore [Phys. Rev. Lett. 100, 141301 (2008)], the adiabatic quantity method given by Kunstatter [Phys. Rev. Lett. 90, 161301 (2003)] is used to calculate the spectrums of a non-extremal Schwarzschild de Sitter black hole in this paper, as well as electrically charged case. According to highly damped Konoplya and Zhidenko's numerical observational results for high overtone modes [JHEP 06, 037 (2004)], we found that the asymptotic non-flat spacetime structure leads to two interesting facts: (i) near inner event horizon, the area and entropy spectrums, which are given by Aen= 8 n1πℏ, Sen= 2πn1ℏ, are equally spaced accurately. (ii) However, near outer cosmological horizon the spectrums, which are in the form of [Formula: see text], are not markedly equidistant. Finally, we also discuss the electrically charged case and find that the black holes in de Sitter spacetime have similar quantization behavior no matter with or without charge.

THE ROLE OF THE ELECTROMAGNETIC FIELD IN DISSIPATIVE COLLAPSE

2013 ◽  
Vol 22 (14) ◽  
pp. 1350087 ◽  
Author(s):  
S. THIRUKKANESH ◽  
M. GOVENDER
Keyword(s):  
Electromagnetic Field ◽  
Evolution Equation ◽  
Temporal Evolution ◽  
Spherically Symmetric ◽  
Junction Conditions ◽  
Symmetric Spacetime ◽  
Charged Case ◽  
Spherically Symmetric Spacetime

In this paper, we investigate the effect of charge on the collapse of a radiating, shearing sphere. The junction conditions required for the smooth matching of a general spherically symmetric spacetime (in the absence of rotation) to the exterior Vaidya–Reissner–Nordström leads to a temporal evolution equation at the boundary of the collapsing star. We are in a position to integrate these equations in the presence of charge and shear. The solutions obtained here are new and generalize recent treatments of dissipative, shearing collapse to the charged case.

scholarly journals Complement to thermodynamics of dyonic Taub-NUT-AdS spacetime

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Robert B. Mann ◽  
Leopoldo A. Pando Zayas ◽  
Miok Park
Keyword(s):  
Heat Capacity ◽  
Gauge Field ◽  
Regularity Condition ◽  
Magnetic Charge ◽  
Temperature Limit ◽  
Regularity Conditions ◽  
Zero Temperature ◽  
Ads Spacetime ◽  
Distinct Features ◽  
Charged Case

Abstract We examine the thermodynamics of Euclidean dyonic Taub-Nut/Bolt-AdS4 black holes for a variety of horizon geometries to understand how gauge field regularity conditions influence the thermodynamic relations. We find several distinct features that distinguish the NUT-charged case from its dyonic Reissner-Nordstrom counterpart. For the Nut solution, the gauge field vanishes at the horizon and so regularity is ensured. For the Bolt solution we find that the norm of the gauge field is required to vanish at the horizon in order to satisfy both regularity and the first law of thermodynamics. This regularity condition yields a constraint on the electric and magnetic charges and so reduces cohomogeneity of the system; for spherical horizons, the regularity condition removing the Misner string singularity further reduces cohomogeneity. We observe that bolt solutions with increasing electric charge have positive heat capacity, but upon turning on the magnetic charge to make the solution dyonic, we find that the properties of the uncharged one are retained, having both positive and negative heat capacity. We also study the extremal Bolt solution, finding that Misner string disappears at the horizon in the zero temperature limit. We find that the extremal solution has finite-temperature-like behaviour, with the electric potential playing a role similar to temperature.

scholarly journals Charging up the functional bootstrap

2021 ◽  
Vol 2021 (10) ◽  
Author(s):  
Kausik Ghosh ◽  
Apratim Kaviraj ◽  
Miguel F. Paulos
Keyword(s):  
Analytic Functional ◽  
Direct Sum ◽  
Free Fields ◽  
Analytic Functionals ◽  
Charged Case

Abstract We revisit the problem of bootstrapping CFT correlators of charged fields. After discussing in detail how bounds for uncharged fields can be recycled to the charged case, we introduce two sets of analytic functional bases for correlators on the line. The first, which we call “simple”, is essentially a direct sum of analytic functionals for the uncharged case. We use it to establish very general bounds on the OPE density appearing in charged correlators. The second basis is dual to generalized free fields and we explain how it is related to a charged version of the Polyakov bootstrap. We apply these functionals to map out the space of correlators and obtain new improved bounds on the 3d Ising twist defect.

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