Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 43 for “"anti-de sitter"”.
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Numerical Construction of Gravitational Solutions in Asymptotically Anti-de Sitter Spacetimes
Asymptotically anti-de Sitter (AdS) spacetimes display intriguing phenomena which have recently sparked increasing interest in the research of gravitational solutions in these spaces. Considerable motivation stems from gauge/gravity duality, which is a conjecture relating classical gravity with a …
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Stationary Anti-de Sitter Black Hole Solutions in and out of Equilibrium
… cosmological constant. The AdS/CFT correspondence has caused an upsurge in studying anti-de Sitter (AdS) space, and under this duality, the study of classical black holes corresponds to studying thermal states of very strongly coupled conformal field theories (CFTs) — an extremely challenging …
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Violating the Weak Cosmic Censorship Conjecture in Asymptotically Anti-de Sitter Space-Times
… in both cases the space-time curvature can be made to grow without bound in a region visible to distant observers by imposing sufficiently violent boundary conditions on the metric or gauge field. In the electromagnetic case, this only happens at zero temperature, and we present a new numerical …
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Lorentz Invariant Spacelike Surfaces of Constant Mean Curvature in Anti-de Sitter 3-Space
… <em>H</em><em> </em>= <em>c</em><em> </em>in the anti-de Sitter 3-space H<sup>3</sup><sub>1</sub>(<em>−c</em><sup>2</sup>) of constant curvature <em>−c</em><sup>2</sup>. In particular, I construct Lorentz invariant spacelike surfaces of constant mean curvature <em>c</em><em> </em>and maximal …
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Lorentzian Poisson homogeneous spaces, quantum groups and noncommutative spacetimes
El objetivo de esta Tesis Doctoral es el estudio de ciertas deformaciones cuánticas de los grupos cinemáticos Lorentzianos (Poincaré y (anti-)de Sitter), sus espacios homogéneos cuánticos asociados, y algunas de sus consecuencias físicas. En particular, se construye el espacio no conmutativo de …
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Infinite Derivative Gravity : a finite number of predictions
Ghost-free Infinite Derivative Gravity (IDG) is a modifed gravity theory which can avoid the singularities predicted by General Relativity. This thesis examines the effect of IDG on four areas of importance for theoretical cosmologists and experimentalists. First, the gravitational potential …
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The trial of the holographic principle
We present an introduction to ideas related to the holographic principle in the context of the well-established duality between classical gravity and conformal fluid dynamics. Foundations of relativistic hydrodynamics, conformal invariance, and geometry of anti-de Sitter spaces are discussed. We …
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Numerical simulations of instabilities in general relativity
General relativity, one of the pillars of our understanding of the universe, has been a remarkably successful theory. It has stood the test of time for more than 100 years and has passed all experimental tests so far. Most recently, the LIGO collaboration made the first-ever direct detection of …
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Numerical implementations of holographic duality via the fluid/gravity correspondence
The fluid/gravity correspondence describes an map from relativistic fluid dynamics to general relativity in an anti de Sitter (AdS) background in one more dimension. This is a specific example of a more general principle known as holographic duality, in which a quantum field theory (QFT) is dual to …
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Supersymmetry at the dawn of the LHC era
… context of anomaly mediation in supergravity, I demonstrate how goldstino couplings can be used as a probe of the underlying symmetry structure of unbroken SUSY in anti-de Sitter space. When multiple SUSY-breaking occurs and goldstini comprise most of the dark matter in the universe, I find a new …
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Bubble nucleation in finite-density gauge theory using the AdS/CFT correspondence
… the N = 4 Super Yang-Mills theory as a "toy model" of QCD to model the spontaneously broken symmetry (Higgsing) SU (Nc) → SU (Nc − n) × U (n). We model the the instability of the phase with unbroken color symmetry (”normal phase”) and the mechanism with which we would have the phase transition …
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The Role of the Volume in Black Hole Thermodynamics
Gibbons et al. [42] found the energy E of Kerr–anti-de Sitter black holes by integrating the first law of black hole thermodynamics, δE=P_iΩiδJ_i+TδS, with black hole angular momenta J_i, angular velocity Ω_i, temperature T and entropy S. They showed that E corresponds to the Ashtekar–Magnon–Das …
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Recent Progress in Quantum Gravity: Karch-Randall Braneworld, Entanglement Islands and Graviton Mass
… we review important recent progress in our understanding of entanglement islands and quantum gravity. We illustrate the concept of entanglement island and its implications to the black hole information paradox using the so called KR braneworld, which provides the only existing calculable …
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Advancing integrability for strings in AdS3/CFT2
In this thesis we develop techniques of integrability in the study of dualities between two-dimensional conformal field theories and theories of closed strings on three-dimensional Anti-de Sitter background geometries. For several years after integrability was first applied to the 3d/2d dualities, …
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Die Methode der nichtlokalen effektiven Wirkung in höherdimensionalen Raumzeitmodellen
Among the most promising candidates for a unified description of quantum <br>theory and gravitation is superstring theory. It predicts the existence of <br>multidimensional stable objects called "branes" (short for membranes). On <br>these branes open strings can end, which also means that the …
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Charged scalar fields and superconductivity in AdS4/CFT3.
… of a massive charged scalar field in an Anti de-Sitter-Reissner-Nordström space-time background using the AdS/CFT correspondence. After obtaining the equations of motion for the system I numerically solve for the vacuum expectation values of the energy momentum tensor of the field on an …
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Geometry and entanglement in AdS/CFT and beyond
Holographic duality is the most well-understood non-perturbative framework of quantum gravity that we have. In particular, it has revealed a deep connection between quantum entanglement and the dual gravitational geometry. A semiclassical analysis on geometries has shed insights on the …
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Non-Relativistic Holography from Horava Gravity
… explored example of this tool is the correspondence between general relativity on five dimensional Anti-de Sitter space and a four dimensional supersymmetric Yang-Mills theory. This case is extremely useful as the strong coupling regime of the Yang-Mills theory is solved by weakly coupled …
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A study of holographic superconductors
… critical phase transition in strongly coupled condensed matter systems can be described by a gravitational theory within the frame work of gauge/gravity correspondence is investigated more extensively for s-wave superconductors. We consider a gravitational theory with a black hole solution in anti …
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From Quantum Information to Cosmic Censorship: Emergent Spacetimes and Their Surfaces
… from the perspective of the AdS/CFT correspondence. We leverage global methods in General Relativity (GR) together with quantum information- and complexity-theoretic properties of the conformal field theory (CFT) dual to obtain novel results in classical and semiclassical gravity. In the first …
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