Sökning: "quantum black holes"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden quantum black holes.

1. 1. String Theory at the Horizon : Quantum Aspects of Black Holes and Cosmology

   Författare :Martin Olsson; Ulf Danielsson; Lárus Thorlacius; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; theoretical physics; string theory; black holes; cosmology; de Sitter space; c=1 matrix models; 2D string theory; topological string theory; conifolds; 4D BPS black holes; Gödel universe; closed time-like curves; Teoretisk fysik; Physics; Fysik;

   Sammanfattning : String theory is a unified framework for general relativity and quantum mechanics, thus being a theory of quantum gravity. In this thesis we discuss various aspects of quantum gravity for particular systems, having in common the existence of horizons. LÄS MER

3. 2. From Quantum to Classical Scattering of Kerr Black Holes : A construction of massive higher-spin scattering amplitudes and their classical limits

   Författare :Lucile Cangemi; Henrik Johansson; Yu-tin Huang; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Higher-spin theory; higher-spin amplitudes; Kerr black holes; EFT; black hole scattering; classical limit; Theoretical Physics; Teoretisk fysik;

   Sammanfattning : Gravitational scattering processes involving black holes as asymptotic states can provide insight into the classical dynamics of binary black hole systems. The observed gravitational waves emitted during mergers need to be compared to high-precision theoretical predictions. LÄS MER

4. 3. Linear response theory: from black holes to Weyl systems and back

   Författare :Jorge Laraña Aragón; Bo Sundborg; Lárus Thorlacius; Emil J. Bergholtz; Ulf Gran; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Linear response; Black holes; Thermalization; Holography; Weyl systems; Non-Hermitian systems; Theoretical Physics; teoretisk fysik;

   Sammanfattning : Linear response theory is a powerful calculation tool in quantum field theory. We apply this framework to a variety of models originating from distinct areas in theoretical physics and for different reasons. LÄS MER

5. 4. A Kerr-full Study of Higher-Spin Amplitudes : An on-shell construction of higher-spin amplitudes for black holes and strings

   Författare :Paolo Pichini; Henrik Johansson; Donal O'Connell; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; scattering amplitudes; higher-spin theory; black holes; string theory; gravitational waves; Theoretical Physics; Teoretisk fysik;

   Sammanfattning : Recently, it was shown that Kerr black holes can be described via the classical infinite-spin limit of a special class of scattering amplitudes in a massive higher-spin quantum field theory. Although this approach has successfully obtained state-of-the-art results for spinning black-hole binaries, only the three-point amplitude that describes Kerr is known in full generality and a full understanding of the underlying Lagrangian is still missing. LÄS MER

7. 5. Making Maps and Keeping Logs : Quantum Gravity from Classical Viewpoints

   Författare :Niklas Johansson; Ulf Danielsson; Jan de Boer; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; String theory; black holes in string theory; Calabi-Yau geometry; flux compactifications; three-dimensional gravity; Mathematical physics; Matematisk fysik; Theoretical Physics; teoretisk fysik;

   Sammanfattning : This thesis explores three different aspects of quantum gravity. First we study D3-brane black holes in Calabi-Yau compactifications of type IIB string theory. Using the OSV conjecture and a relation between topological strings and matrix models we show that some black holes have a matrix model description. LÄS MER