Class of Einstein-Maxwell-dilaton-axion space-times

Matos, Tonatiuh; Miranda, Galaxia; Sánchez-Sánchez, Rubén; Wiederhold, Petra

doi:10.1103/physrevd.79.124016

Cited by 10 publications

(8 citation statements)

References 12 publications

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“…We will examine shortly and in detail the solutions emanating for the 4-dimensional case. Lastly, by defining B(p) = A(p)dp (19) and combining (18) and (17) we get…”

Section: A Case Of Cylindrical Symmetrymentioning

confidence: 99%

“…In this paper we will study in some detail the simplest non-trivial theories including a scalar and Maxwell field with a Liouville potential. Although this theory does not capture all the details of string effective actions (where additional fields are present, like the axion, see [19], potentials are more complicated, etc.,) it contains the essential ingredients that will result in some of the phenomena we described above. Given the complicated theory at hand we will restrict ourselves to cylindrical symmetry or constant curvature horizons (in other words, d − 2 homogeneous subspaces of constant curvature).…”

Section: Introductionmentioning

confidence: 99%

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Einstein-Maxwell-dilaton theories with a Liouville potential

2009

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We find and analyse solutions of Einstein's equations in arbitrary dimensions and in the presence of a scalar field with a Liouville potential coupled to a Maxwell field. We consider spacetimes of cylindrical symmetry or again subspaces of dimension d − 2 with constant curvature and analyse in detail the field equations and manifest their symmetries. The field equations of the full system are shown to reduce to a single or couple of ODE's which can be used to solve analytically or numerically the theory for the symmetry at hand. Further solutions can also be generated by a solution generating technique akin to the EM duality in the absence of a cosmological constant. We then find and analyse explicit solutions including black holes and gravitating solitons for the case of four dimensional relativity and the higher-dimensional oxydised 5-dimensional spacetime. The general solution is obtained for a certain relation between couplings in the case of cylindrical symmetry.

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“…We will examine shortly and in detail the solutions emanating for the 4-dimensional case. Lastly, by defining B(p) = A(p)dp (19) and combining (18) and (17) we get…”

Section: A Case Of Cylindrical Symmetrymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Einstein-Maxwell-dilaton theories with a Liouville potential

2009

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“…into the lagragian and make a rescale, we can obtain the same equation of motion. One may seek more information about the equivalence of these two theory in [39,40].…”

Section: A Rotating Linear Dilaton Black Hole In Emda Theorymentioning

confidence: 99%

Weak cosmic censorship conjecture is not violated for a rotating linear dilaton black hole

Qu,

Yang,

Wang

et al. 2020

Preprint

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In this paper, we investigate the validity of the weak cosmic censorship conjecture(WCCC) for a rotating linear dilaton black hole from two different methods. By using the classsical ingoing test particle method, we obtain the same results as given in the new version of gedanken experiment recently proposed by Wald. We find that even for this rotating linear dilaton black hole the Iyer-Wald formalism is still functioning. By comparing these two methods, we find that the same result will be obtained in both cases up to first order. The nearly extremal black hole can be overspun, while the extremal one cannot be overspun. When we include the second order modification into consideration, the Iyer-Wald method show that even for the nearly extremal black hole, the WCCC is well protected. These results imply that weak cosmic censorship conjecture is still valid using the ingoing test particle method up to second order modification.

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“…e.g., [27][28][29][30][31][32][33][34]). There exists now the tendency for the unification of the Maxwell-dilaton theory and axion electrodynamics [35][36][37]), and for formulation of the nonlinear version of this unified theory [38,39]. In other words, the relativistic astrophysics and cosmology, which operate with the axionic dark matter [40][41][42] engage the theoreticians for construction of the nonlinear axion-dilaton electrodynamics.…”

Section: Introductionmentioning

confidence: 99%

Towards nonlinear axion-dilaton electrodynamics: How can axionic dark matter mimic dilaton-photon interactions?

Balakin,

Galimova

2021

Preprint

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In the framework of the Einstein-Maxwell-axion-aether theory we establish the model, the Lagrangian of which contains the sin-type generalization of the term describing the axion-photon coupling, and the axionically induced cosine-type modification of the term attributed to the dilatonphoton interactions. The extension of the axion-dilaton-aether electrodynamics is inspired by the Jackson's idea concerning the internal symmetry of the equations of electromagnetism. The application of the extended theory to the anisotropic homogeneous cosmological model of the Bianchi-I type is considered. The exact solutions to the model evolutionary equations are obtained for the case, when the axionic dark matter is in the state of equilibrium, which is characterized by vanishing potential of the pseudoscalar field and its first derivative. The state of the axion-photon system, which is of a new type and is indicated as a dynamic equilibrium, is studied in the framework of electrodynamics with axionic non-linearity. We show that the nonlinear axion-photon interactions can mimic the dilaton-photon coupling. We discuss the stability of the model with respect to homogeneous fluctuations of the axion field.

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Class of Einstein-Maxwell-dilaton-axion space-times

Cited by 10 publications

References 12 publications

Einstein-Maxwell-dilaton theories with a Liouville potential

Einstein-Maxwell-dilaton theories with a Liouville potential

Weak cosmic censorship conjecture is not violated for a rotating linear dilaton black hole

Towards nonlinear axion-dilaton electrodynamics: How can axionic dark matter mimic dilaton-photon interactions?

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