شماره راهنما :
1447 دكتري
پديد آورنده :
ميرزاييان، زهرا
عنوان :
بارهاي پايسته در نظريه هاي گرانشي و تابش هاوكينگ
گرايش تحصيلي :
گرانش و كيهان شناسي
محل تحصيل :
اصفهان : دانشگاه صنعتي اصفهان
صفحه شمار :
پنج، 166 ص. : مصور، جدول، نمودار
استاد راهنما :
بهروز ميرزا
توصيفگر ها :
تقارن , بارهاي پايسته , بارهاي ابرانتقال و ابردوران , سرعت تابش آنتروپي , منشا توليد زوج هاي هاوكينگ , الگوريتم يانيس-نيومن , تقارن هاي مجانبي فضا-زمان
استاد داور :
محمدرضا ستاره، مرتضي سلطاني، صديقه سجاديان
تاريخ ورود اطلاعات :
1398/07/01
تاريخ ويرايش اطلاعات :
1398/07/02
چكيده انگليسي :
abstract we explore various aspects of black holes and gravitational theories We focus on finding theconserved charges in gravitational theories using SPSM method including mass angular momentumand electric charges associated with the symmetris of the theory We also investigate the near horizonconserved charges including supertranslation and superrotation soft charges asssociated with non trivial diffeomorphisms Assuming Hawking mechanism for evaporation process in black holes we introduce a maximumconjecture for the rate of entropy emission for the first time We also address the issue about the region of origin of the Hawking quanta using both a heuristicargument and a detailed study of the renormalized stress energy tensor RSET We present compellingevidence that the Hawking quanta originate from what might be called a quantum atmosphere aroundthe black hole with energy density and fluxes of particles peaked at about 4M running contrary tothe popular belief that these originate from the ultra high energy excitations very close to the horizon We then study the behavior of the effective Hawking temperature as perceived by a free falling ob server We compute the energy density using this temperature and compare it with the energy densityobtained from RSET measured by the same observer and notice a discrepancy We further computethe adiabaticity of this temperature and try to explain the reason for this discrepancy Finally we introduce a mathematical method for finding the exact solution for five dimensionalMyers Perry black holes using Janis Newman algorithm Keywords Symmetry Conserved charges Supertranslation and superrotation charges Rate ofentropy emission hawking radiation pair production Janis newman algorithm
استاد راهنما :
بهروز ميرزا
استاد داور :
محمدرضا ستاره، مرتضي سلطاني، صديقه سجاديان
