Dark energy as a kinematic effect

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Caixa experimentoteca: uma proposta para o ensino de astronomia

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Jogos eletrônicos e ensino de física: potenciais e possibilidades

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Teleparalelismo: formulação hamiltoniana e estrutura de vínculos

Pós-graduação em Física - IFT

Equação de Estado para o Universo Primordial

Pós-graduação em Física - IFT

Aspectos clássicos de teorias de segunda ordem

Pós-graduação em Física - IFT

Buraco negros, correspondência AdS/BCFT e fluido/gravidade

Einstein’s equations with negative cosmological constant possess the so-called anti de Sitter space, AdSd+1, as one of its solutions. We will later refer to this space as to the "bulk". The holographic principle states that quantum gravity in the AdSd+1 space can be encoded by a d−dimensional quantum field theory on the boundary of AdSd+1 space, invariant under conformal transformations, a CFTd. In the most famous example, the precise statement is the duality of the type IIB string theory in the space AdS5 × S 5 and the 4−dimensional N = 4 supersymmetric Yang-Mills theory. Another example is provided by a relation between Einstein’s equations in the bulk and hydrodynamic equations describing the effective theory on the boundary, the so-called fluid/gravity correspondence. An extension of the "AdS/CFT duality"for the CFT’s with boundary was proposed by Takayanagi, which was dubbed the AdS/BCFT correspondence. The boundary of a CFT extends to the bulk and restricts a region of the AdSd+1. Neumann conditions imposed on the extension of the boundary yield a dynamic equation that determines the shape of the extension. From the perspective of fluid/gravity correspondence, the shape of the Neumann boundary, and the geometry of the bulk is sourced by the energy-momentum tensor Tµν of a fluid residing on this boundary. Clarifying the relation of the Takayanagi’s proposal to the fluid/gravity correspondence, we will study the consistence of the AdS/BCFT with finite temperature CFT’s, or equivalently black hole geometries in the bulk.

Física : força centrípeta e movimento circular uniforme

Recurso educativo de apoio à unidade curricular de física