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Ushbu maqоlada nosingulyar statik sferik-simmetrik metrikaning ma’lum bir kinetik bоg‘lanish funksiyasi h(ϕ)  va pоtensiali U(ϕ)  larni topishda skalyar-tenzor nazariyadan foydalanish imkoniyatlari ko‘rsatib beriladi. Bunda, skalyar maydоn о‘z hоlatini ma’lum kооrdinatalarda kanоnik kо‘rinishdan fantоmga о‘zgartirishi mumkinligi inobatga olinadi. STN kо‘rinishi radial kооrdinataning tо‘liq sоhasida emas balki chegaralangan sоhasida Simpsоn-Visser metrikasi vositasida qarab chiqiladi.

  • Read count 110
  • Date of publication 29-03-2024
  • Main LanguageO'zbek
  • Pages25-29
Ўзбек

Ushbu maqоlada nosingulyar statik sferik-simmetrik metrikaning ma’lum bir kinetik bоg‘lanish funksiyasi h(ϕ)  va pоtensiali U(ϕ)  larni topishda skalyar-tenzor nazariyadan foydalanish imkoniyatlari ko‘rsatib beriladi. Bunda, skalyar maydоn о‘z hоlatini ma’lum kооrdinatalarda kanоnik kо‘rinishdan fantоmga о‘zgartirishi mumkinligi inobatga olinadi. STN kо‘rinishi radial kооrdinataning tо‘liq sоhasida emas balki chegaralangan sоhasida Simpsоn-Visser metrikasi vositasida qarab chiqiladi.

English

This article shows the possibilities of using the scalar-tensor theory in finding the kinetic coupling function h(ϕ)  and potential U(ϕ)  of the non-singular static spherical-symmetric metric. In this case, it is taken into account that the scalar field can change its state from canonical to phantom in certain coordinates. The appearance of STN is determined by the Simpson-Visser metric, not in the full area of the radial coordinate, but in a limited area.

Русский

В статье показаны возможности использования скалярно-тензорной теории для кинетическая функция связи h(ϕ)  и потенциала U(ϕ)  неособой статической сферически-симметричной метрики. При этом учитывается, что скалярное поле может менять свое состояние с канонического на фантомное в определенных координатах. Появление СТН определяется метрикой Симпсона-Виссера не на всей площади радиальной координаты, а на ограниченной области.

Author name position Name of organisation
1 Badalov Q.. assistent O'zbekiston-Finlandiya pedagogika instituti
2 Ibodov R.. professor SamDU
Name of reference
1 1. A. Simpson and M. Visser, Black bounce to traversable wormhole, JCAP 02, 042 (2019).
2 2. E. Franzin, S. Liberati, J. Mazza, A. Simpson and M. Visser, Charged black-bounce spacetimes, JCAP 07, 036 (2021).
3 3. K. A. Bronnikov and S. G. Rubin. Black Holes, Cosmology, and Extra Dimensions (2nd edition, World Scienti_c, 2021).
4 4. P. G. Bergmann, Comments on the scalar-tensor theory, Int. J. Theor. Phys. 1, 25 (1968).
5 5. R. Wagoner, Scalar-tensor theory and gravitational waves, Phys. Rev. D 1, 3209 (1970).
6 6. K. Nordtvedt, Post-Newtonian metric for a general class of scalar-tensor gravitational theories and observational consequences, Astroph. J. 161, 1059 (1970). Bronnikov, K.A., Badalov, K. & Ibadov, R. Arbitrary Static, Spherically Symmetric Space-Times as Solutions of Scalar-Tensor Gravity. Gravit. Cosmol. 29, 43–49 (2023). https://doi.org/10.1134/S0202289323010036
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