Fields of accelerated sources: Born in de Sitter

Bičák, Jiřı́; Krtouš, Pavel

doi:10.1063/1.2009647

Cited by 24 publications

(21 citation statements)

References 46 publications

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“…Such a directional dependence was explicitly found and described for the first time in the context of the test electromagnetic field generated by a pair of uniformly accelerated point-like charges in the de Sitter background [101,108]. In particular, it was demonstrated that there always exist two special directions -those opposite to the direction from the sources -along which the radiation vanishes.…”

Section: On Studies Of Asymptotic Behaviour Of Radiative Fields In Gementioning

confidence: 94%

Asymptotic directional structure of radiative fields in spacetimes with a cosmological constant

Krtouš¹,

Podolský²

2004

Class. Quantum Grav.

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Abstract. We analyze the directional properties of general gravitational, electromagnetic, and spin-s fields near conformal infinity I. The fields are evaluated in normalized tetrads which are parallelly propagated along null geodesics which approach a point P of I. The standard peelingoff property is recovered and its meaning is discussed and refined. When the (local) character of the conformal infinity is null, such as in asymptotically flat spacetimes, the dominant term which is identified with radiation is unique. However, for spacetimes with a non-vanishing cosmological constant the conformal infinity is spacelike (for Λ > 0) or timelike (for Λ < 0), and the radiative component of each field depends substantially on the null direction along which P is approached.The directional dependence of asymptotic fields near such de Sitter-like or anti-de Sitterlike I is explicitly found and described. We demonstrate that the corresponding directional structure of radiation has a universal character that is determined by the algebraic (Petrov) type of the field. In particular, when Λ > 0 the radiation vanishes only along directions which are opposite to principal null directions. For Λ < 0 the directional dependence is more complicated because it is necessary to distinguish outgoing and ingoing radiation. Near such anti-de Sitterlike conformal infinity the corresponding directional structures differ, depending not only on the number and degeneracy of the principal null directions at P but also on their specific orientation with respect to I.The directional structure of radiation near (anti-)de Sitter-like infinities supplements the standard peeling-off property of spin-s fields. This characterization offers a better understanding of the asymptotic behaviour of the fields near conformal infinity under the presence of a cosmological constant.

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Section: On Studies Of Asymptotic Behaviour Of Radiative Fields In Gementioning

confidence: 94%

Asymptotic directional structure of radiative fields in spacetimes with a cosmological constant

Krtouš¹,

Podolský²

2004

Class. Quantum Grav.

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“…The classical problem of inertial and accelerated charges in various charts of dS spacetime has been examined in refs [2,3]. For comoving observers situated at fixed comoving distance, which have p cons = 0, the electric field is purely radial and there is no magnetic field, signaling thus the absence of radiation [4].…”

Section: Introductionmentioning

confidence: 99%

Radiation of inertial scalar particles in the de Sitter universe

Blaga

2015

Mod. Phys. Lett. A

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We investigate the radiation of an inertial scalar particle evolving in a de Sitter expanding Universe. In the context of scalar QED the process is generated by the first order term in the perturbation theory expansion of the S-matrix. The partial transition probability is obtained and analysed, and soft-photon emission is found to dominate overall. It has been argued that an inertial particle evolving in dS spacetime loses physical momentum just as a decelerated particle in Minkowski space does. It is thus expected that an inertial charge will radiate in a similar way.We investigate the radiated energy and make a qualitative comparison of the angular distribution of the energy with the radiation pattern in the latter case.

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“…The traditional ways to do it are the method of Green function and the conformal mapping method [10].…”

Section: Discussionmentioning

confidence: 99%

Charged particles in curved space-time

Mehdizadeh

Jalili

2015

J Theor Appl Phys

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Considering the dynamics of geometry and the matter fields, dynamical equations of geometry and the matter fields are re-derived. The solutions of these equations are studied. We focus on a charged particle and explain the axiomatic approach to drive the electromagnetic self-force on its motion, then the energy conservation is considered. A new mathematical concept, which is introduced in axiomatic approach in general, is discussed.

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Fields of accelerated sources: Born in de Sitter

Cited by 24 publications

References 46 publications

Asymptotic directional structure of radiative fields in spacetimes with a cosmological constant

Asymptotic directional structure of radiative fields in spacetimes with a cosmological constant

Radiation of inertial scalar particles in the de Sitter universe

Charged particles in curved space-time

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