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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Shahidan Radiman, Prof. Dr. | - |
| dc.contributor.author | Niloofar Abbasvandi (P73076) | - |
| dc.date.accessioned | 2023-10-13T09:37:13Z | - |
| dc.date.available | 2023-10-13T09:37:13Z | - |
| dc.date.issued | 2017-04-14 | - |
| dc.identifier.other | ukmvital:97901 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/500009 | - |
| dc.description | Black holes play a fundamental role in gravitational physics and they have characteristic oscillation modes called quasinormal modes. The quasinormal modes (QNMs) of black holes, which depend only on black hole parameters but not on the initial perturbation, present a discrete set of complex frequencies corresponding to the solutions of the perturbation equations. In general, the imaginary part of the complex frequencies is associated with the decay timescale of the perturbation while the real part represents the actual frequency of the oscillation. The QNMs are great importance in black hole physics, gravitational wave astrophysics, and can be observed in existing or advanced gravitational wave detectors such as LIGO and VIRGO. Black holes in higher dimensional spacetime have attracted a lot of interest during the past one decade approached by different theories such as supersymmetric string theory, Loop quantum gravity, spin foams and different extra dimensions scenarios and some have extended the investigation of QNMs to higher dimensional spacetime. It is expected that the Planck scale is of the order of TeV under low scale higher dimensional brane world models, and thereby quantum gravity may show itself at hadronic colliders such as higher dimensional black holes could be created at Large Hadron Collider (LHC). In this thesis, we investigated the QNMs of black holes in higher dimensional spacetime, using Lovelock extended gravitational theory with higher power of curvature in higher dimensions considering up to the third order of Lovelock coupling constant in related Lagrangian equation. In this case, we studied and computed quasinormal mode in the D-infinity limit in Lovelock background and extend the analysis to Lovelock theory by taking into account correction to maximal length, maximal momentum, and minimal momentum in the field theory using Generalized Uncertainty Principle (GUP) in higher dimensions. We considered massless scalar field and showed the master equation for gravitational perturbation of massless scalar field exist in d-dimensional Lovelock spacetime. We then obtain the effective potential and we adopt WKB approximation method up to six order for 8 dimensional spacetime for Lovelock black holes. Finally, we numerically compute the QNMs of asymptotically flat as well as asymptotically (A)dS spherical static black holes in Lovelock background with the help of commercial soft wares such as Maple, Mathematica, and MATLAB. We also investigated the Lovelock coupling constant effect on thermodynamical parameters such as Hawking temperature and Hawking-Bekenstein's Entropy. We find that the QNFs show remarkable features depending on the coefficients of the Lovelock terms, the types of perturbations, and spacetime dimensions. When we increase the coefficient of the third order Lovelock term, the real part of QNFs increases, but the decay rate becomes small irrespective of the mass of the black hole. Moreover, we find, although, Lovelock theory has a rich structure of AdS vacua, the 6th order of the WKB approximation is not precise to compute the poles of the retarded correlators of the thermal Super Yang Mills theory using AdS/CFT correspondence by investigating QNMs of asymptotically AdS spherical static black holes in Lovelock gravity. In this case, we find thermodynamic parameters, like Hawking temperature and the entropy, are related to the second order of the coupling constant of the Lovelock theory for 5 and 6 dimensional spacetime. In this case, for 7 dimensional, they are related to the second and third order of the constant of the Lovelock.,Certification of Master's/Doctoral Thesis" is not available | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | - |
| dc.rights | UKM | - |
| dc.subject | Black hole | - |
| dc.subject | Quasinormal modes | - |
| dc.subject | Gravity stations | - |
| dc.title | Quasinormal modes in the D infinity limit in Lovelock gravity | - |
| dc.type | Theses | - |
| dc.format.pages | 191 | - |
| dc.identifier.callno | QB336.A233 2017 tesis | - |
| dc.identifier.barcode | 003018(2017) | - |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_97901+SOURCE1+SOURCE1.0.PDF Restricted Access | 153.88 kB | Adobe PDF |  View/Open |
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