scholarly journals Asymptotic symmetry algebras of conformal gravity in four dimensions

2017 ◽  
Author(s):  
Iva Lovrekovic
Keyword(s):  
Conformal Gravity ◽  
Asymptotic Symmetry ◽  
Four Dimensions ◽  
Symmetry Algebras

scholarly journals Canonical charges and asymptotic symmetry algebra of conformal gravity

2015 ◽  
Vol 91 (10) ◽  
Author(s):  
Maria Irakleidou ◽  
Iva Lovrekovic ◽  
Florian Preis
Keyword(s):  
Symmetry Algebra ◽  
Conformal Gravity ◽  
Asymptotic Symmetry

scholarly journals Asymptotic symmetry of four dimensional Einstein-Yang-Mills and Einstein-Maxwell theory

2022 ◽  
Vol 2022 (1) ◽  
Author(s):  
Nabamita Banerjee ◽  
Tabasum Rahnuma ◽  
Ranveer Kumar Singh
Keyword(s):  
Asymptotic Symmetry ◽  
Maxwell Theory ◽  
Asymptotically Flat ◽  
Yang Mills ◽  
Alternative Approach ◽  
Pure Gravity ◽  
Asymptotic Symmetries ◽  
Symmetry Algebras

Abstract Asymptotic symmetry plays an important role in determining physical observables of a theory. Recently, in the context of four dimensional asymptotically flat pure gravity and $$ \mathcal{N} $$ N = 1 supergravity, it has been proposed that OPEs of appropriate celestial amplitudes can be used to find their asymptotic symmetries. In this paper we find the asymptotic symmetry algebras of four dimensional Einstein-Yang-Mills and Einstein-Maxwell theories using this alternative approach, namely using the OPEs of their respective celestial amplitudes. The algebra obtained here are in agreement with the known results in the literature.

scholarly journals Topological conformal gravity in four dimensions

1993 ◽  
Vol 401 (1-2) ◽  
pp. 206-238 ◽  
Author(s):  
Malcolm J. Perry ◽  
Edward Teo
Keyword(s):  
Conformal Gravity ◽  
Four Dimensions

scholarly journals THE CLIFFORD SPACE GEOMETRY OF CONFORMAL GRAVITY AND U(4) × U(4) YANG–MILLS UNIFICATION

2010 ◽  
Vol 25 (01) ◽  
pp. 123-143 ◽  
Author(s):  
CARLOS CASTRO
Keyword(s):  
Dimensional Space ◽  
Star Product ◽  
Unified Theory ◽  
Grand Unified Theory ◽  
Conformal Gravity ◽  
Four Dimensions ◽  
Yang Mills ◽  
C Algebra ◽  
The Standard Model ◽  
Dimensional Space Time

It is shown how a conformal gravity and U (4) × U (4) Yang–Mills grand unification model in four dimensions can be attained from a Clifford gauge field theory in C-spaces (Clifford spaces) based on the (complex) Clifford Cl (4, C) algebra underlying a complexified four-dimensional space–time (eight real dimensions). Upon taking a real slice, and after symmetry breaking, it leads to ordinary gravity and the Standard Model in four real dimensions. A brief conclusion about the noncommutative star-product deformations of this Grand Unified Theory of gravity with the other forces of Nature is presented.

scholarly journals A note on Kerr/CFT and Wald entropy discrepancy in high derivative gravities

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Hai-Shan Liu ◽  
H. Lü
Keyword(s):  
High Derivative ◽  
Einstein Gravity ◽  
Asymptotic Symmetry ◽  
Five Dimensions ◽  
Curvature Invariants ◽  
Symmetry Algebras

Abstract We examine the Kerr/CFT correspondence in Einstein gravity extended with quadratic curvature invariants. We consider two explicit examples in four and five dimensions and compute the central charges of the asymptotic symmetry algebras of the near horizon geometries, using the improved version of the BBC formalism that encompasses the information of the Lagrangian. We find that the resulting Cardy entropy differs from the Wald entropy, caused by the Riemann-squared RμνρσRμνρσ term.

scholarly journals Asymptotic symmetry algebra of conformal gravity

2017 ◽  
Vol 96 (10) ◽  
Author(s):  
Maria Irakleidou ◽  
Iva Lovrekovic
Keyword(s):  
Symmetry Algebra ◽  
Conformal Gravity ◽  
Asymptotic Symmetry

scholarly journals On rigidity of 3d asymptotic symmetry algebras

2019 ◽  
Vol 2019 (3) ◽  
Author(s):  
A. Farahmand Parsa ◽  
H. R. Safari ◽  
M. M. Sheikh-Jabbari
Keyword(s):  
Asymptotic Symmetry ◽  
Symmetry Algebras

scholarly journals P–V criticality of conformal gravity holography in four dimensions

2018 ◽  
Vol 33 (05) ◽  
pp. 1850030 ◽  
Author(s):  
Parthapratim Pradhan
Keyword(s):  
Equation Of State ◽  
Critical Ratio ◽  
Conformal Gravity ◽  
De Sitter ◽  
Extended Phase ◽  
Reduced Pressure ◽  
Spacetime Geometry ◽  
Four Dimensions ◽  
Main Work ◽  
Reverse Isoperimetric Inequality

We examine the critical behavior, i.e. P–V criticality of conformal gravity (CG) in an extended phase space in which the cosmological constant should be interpreted as a thermodynamic pressure and the corresponding conjugate quantity as a thermodynamic volume. The main potential point of interest in CG is that there exists a nontrivial Rindler parameter [Formula: see text] in the spacetime geometry. This geometric parameter has an important role to construct a model for gravity at large distances where the parameter “[Formula: see text]” actually originates. We also investigate the effect of the said parameter on the black hole (BH) thermodynamic equation of state, critical constants, Reverse Isoperimetric Inequality, first law of thermodynamics, Hawking–Page phase transition and Gibbs free energy for this BH. We speculate that due to the presence of the said parameter, there has been a deformation in the shape of the isotherms in the P–V diagram in comparison with the charged-anti de Sitter (AdS) BH and the chargeless-AdS BH. Interestingly, we find that the critical ratio for this BH is [Formula: see text], which is greater than the charged AdS BH and Schwarzschild–AdS BH, i.e. [Formula: see text]. The symbols are defined in the main work. Moreover, we observe that the critical ratio has a constant value and it is independent of the nontrivial Rindler parameter [Formula: see text]. Finally, we derive the reduced equation of state in terms of the reduced temperature, the reduced volume and the reduced pressure, respectively.

scholarly journals Conformal Gravity Holography in Four Dimensions

2014 ◽  
Vol 112 (11) ◽  
Author(s):  
Daniel Grumiller ◽  
Maria Irakleidou ◽  
Iva Lovrekovic ◽  
Robert McNees
Keyword(s):  
Conformal Gravity ◽  
Four Dimensions

FACT-2 – The Frankfurt Adaptive Concentration Test

2009 ◽  
Vol 25 (2) ◽  
pp. 73-82 ◽  
Author(s):  
Frank Goldhammer ◽  
Helfried Moosbrugger ◽  
Sabine A. Krawietz
Keyword(s):  
Convergent Validity ◽  
Four Dimensions ◽  
Measurement Models ◽  
Cognitive Failures ◽  
Concentration Test ◽  
Cognitive Failures Questionnaire

The Frankfurt Adaptive Concentration Test (FACT-2) requires discrimination between geometric target and nontarget items as quickly and accurately as possible. Three forms of the FACT-2 were constructed, namely FACT-I, FACT-S, and FACT-SR. The aim of the present study was to investigate the convergent validity of the FACT-SR with self-reported cognitive failures. The FACT-SR and the Cognitive Failures Questionnaire (CFQ) were completed by 191 participants. The measurement models confirmed the concentration performance, concentration accuracy, and concentration homogeneity dimensions of FACT-SR. The four dimensions of the CFQ (i.e., memory, distractibility, blunders, and names) were not confirmed. The results showed moderate convergent validity of concentration performance, concentration accuracy, and concentration homogeneity with two CFQ dimensions, namely memory and distractibility/blunders.

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