On a Class of Harko-Kovacs-Lobo Wormholes
The Harko, Kovács, and Lobo wormhole (HKLWH) metric contains two free parameters: one is the wormhole throat <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>r</mi><mn>0</mn><...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/8/10/540 |
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| author | Ramis Kh. Karimov Ramil N. Izmailov Kamal K. Nandi |
| author_facet | Ramis Kh. Karimov Ramil N. Izmailov Kamal K. Nandi |
| author_sort | Ramis Kh. Karimov |
| collection | DOAJ |
| description | The Harko, Kovács, and Lobo wormhole (HKLWH) metric contains two free parameters: one is the wormhole throat <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>r</mi><mn>0</mn></msub></semantics></math></inline-formula>, and the other is a dimensionless deviation parameter <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula> with values <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo><</mo><mi>γ</mi><mo><</mo><mn>1</mn></mrow></semantics></math></inline-formula>, the latter ensuring the needed violation of the null energy condition at the throat. In this paper, we study the energetics of the HKLWH and the influence of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula> on the tidal forces in the Lorentz-boosted frame. Finally, we apply a new concept, namely, the probabilistic identity of the object observed by different external observers in terms of the Fresnel coefficients derived by Tangherlini. The intriguing result is that observations can differ depending on the location of the observer, i.e., there is a nonzero probability that the HKLWH will be identified as a black hole even when <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>γ</mi><mo>≠</mo><mn>0</mn></mrow></semantics></math></inline-formula>. |
| first_indexed | 2024-03-09T19:25:22Z |
| format | Article |
| id | doaj.art-e57a2be4f0d247c29470cca5ade54573 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T19:25:22Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-e57a2be4f0d247c29470cca5ade545732023-11-24T03:02:00ZengMDPI AGUniverse2218-19972022-10-0181054010.3390/universe8100540On a Class of Harko-Kovacs-Lobo WormholesRamis Kh. Karimov0Ramil N. Izmailov1Kamal K. Nandi2Zel’dovich International Center for Astrophysics, Bashkir State Pedagogical University 3A, October Revolution Street, 450008 Ufa, RB, RussiaZel’dovich International Center for Astrophysics, Bashkir State Pedagogical University 3A, October Revolution Street, 450008 Ufa, RB, RussiaZel’dovich International Center for Astrophysics, Bashkir State Pedagogical University 3A, October Revolution Street, 450008 Ufa, RB, RussiaThe Harko, Kovács, and Lobo wormhole (HKLWH) metric contains two free parameters: one is the wormhole throat <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>r</mi><mn>0</mn></msub></semantics></math></inline-formula>, and the other is a dimensionless deviation parameter <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula> with values <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo><</mo><mi>γ</mi><mo><</mo><mn>1</mn></mrow></semantics></math></inline-formula>, the latter ensuring the needed violation of the null energy condition at the throat. In this paper, we study the energetics of the HKLWH and the influence of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi>γ</mi></semantics></math></inline-formula> on the tidal forces in the Lorentz-boosted frame. Finally, we apply a new concept, namely, the probabilistic identity of the object observed by different external observers in terms of the Fresnel coefficients derived by Tangherlini. The intriguing result is that observations can differ depending on the location of the observer, i.e., there is a nonzero probability that the HKLWH will be identified as a black hole even when <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>γ</mi><mo>≠</mo><mn>0</mn></mrow></semantics></math></inline-formula>.https://www.mdpi.com/2218-1997/8/10/540wormholeenergy conditionsFresnel coefficients |
| spellingShingle | Ramis Kh. Karimov Ramil N. Izmailov Kamal K. Nandi On a Class of Harko-Kovacs-Lobo Wormholes Universe wormhole energy conditions Fresnel coefficients |
| title | On a Class of Harko-Kovacs-Lobo Wormholes |
| title_full | On a Class of Harko-Kovacs-Lobo Wormholes |
| title_fullStr | On a Class of Harko-Kovacs-Lobo Wormholes |
| title_full_unstemmed | On a Class of Harko-Kovacs-Lobo Wormholes |
| title_short | On a Class of Harko-Kovacs-Lobo Wormholes |
| title_sort | on a class of harko kovacs lobo wormholes |
| topic | wormhole energy conditions Fresnel coefficients |
| url | https://www.mdpi.com/2218-1997/8/10/540 |
| work_keys_str_mv | AT ramiskhkarimov onaclassofharkokovacslobowormholes AT ramilnizmailov onaclassofharkokovacslobowormholes AT kamalknandi onaclassofharkokovacslobowormholes |