09 بهمن 1401
سعيده صادقيان

سعیده صادقیان

مرتبه علمی: استادیار
نشانی: دانشگاه مازندران
تحصیلات: دکترای تخصصی / فیزیک-ذرات بنیادی
تلفن: 011-35302442
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان AdS_3 to dS_3 transition in the near horizon of asymptotically de Sitter solutions
نوع پژوهش مقاله چاپ شده
کلیدواژه‌ها
Kerr black hole, BTZ, horizon,cosmological soliton, thermodynamics
مجله Physical Review D - Particles, Fields, Gravitation and Cosmology
شناسه DOI 10.1103/PhysRevD.96.044004
پژوهشگران سعیده صادقیان (نفر اول) ، محمد حسن وحیدی نیا (نفر دوم)

چکیده

We consider two solutions of Einstein-Λ theory which admit the extremal vanishing horizon (EVH) limit, odd-dimensional multispinning Kerr black hole (in the presence of cosmological constant) and cosmological soliton. We show that the near horizon EVH geometry of Kerr has a three-dimensional maximally symmetric subspace whose curvature depends on rotational parameters and the cosmological constant. In the Kerr-dS case, this subspace interpolates between AdS3, three-dimensional flat and dS3 by varying rotational parameters, while the near horizon of the EVH cosmological soliton always has a dS3. The feature of the EVH cosmological soliton is that it is regular everywhere on the horizon. In the near EVH case, these three-dimensional parts turn into the corresponding locally maximally symmetric spacetimes with a horizon: Kerr-dS3, flat space cosmology or BTZ black hole. We show that their thermodynamics match with the thermodynamics of the original near EVH black holes. We also briefly discuss the holographic two-dimensional CFT dual to the near horizon of EVH solutions.