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 12 of 12 for “"momentum tensor"”.
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Linear and non-linear collisionless many-particle systems
… terms of the force field and the volume of the momentum support of the distribution function. Consequently, we obtain global existence of Gevrey solutions for the three dimensional Vlasov--Poisson system, in the torus and the whole space. In Chapter 3, we obtain linear and non-linear stability …
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Jet structure and planarity in pi- rho interactions at 147 gev/c
… in the investigation include invariants of the momentum tensor for each event and simple models used for comparison with the data. Jet structure is found to be closely associated with leading particle production. In the central region, jet structure is seen to be absent. No strong evidence for …
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Towards a spacetime description of hard parton evolution in the quark gluon plasma
… a perturbative expression for the Energy Momentum Tensor of hard partons created before the formation of the Quark Gluon Plasma. We propose this as a foundational model to use as an initial condition in jet energy loss calculations.
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Charged scalar fields and superconductivity in AdS4/CFT3.
… for the vacuum expectation values of the energy momentum tensor of the field on an AdS4 background. It will be shown that the vev condenses as the temperature of the black hole is lowered, suggesting superconductivity. I then add a time dependent part to the scalar field and examine how it …
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BIANCHI-ICOSMOLOGICALMODEL IN f(R,T) GRAVITY
… bulk viscous pressure term in the matter energy-momentum tensor may lead to an accelerating universe. This dissertation primarily investigates exact solutions of LRS Bianchi-I cosmological model with and without viscous matter in f(R,T) theory of gravity, where f(R,T) is an arbitrary function of …
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Exact non-equilibrium solutions of the Einstein-Boltzmann equations
… the conservation of particle number and energy-momentum, and by the H-theorem are determined. The properties of exact truncated Boltzmann solutions with first and second order anisotropies are investigated. Exact entropy results are obtained for the solution with first order anisotropy, and the …
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Gravitational form factors of hadrons from lattice QCD
… hadrons encode the matrix elements of the energy-momentum tensor of QCD. These quantities describe how energy, spin, and various mechanical properties of hadrons are carried by their quark and gluon constituents, and can be constrained using the framework of lattice quantum chromodynamics (QCD). …
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Transport in a Strongly Coupled Charged Relativistic Quantum Fluid in the Presence of a Chiral Anomaly & a Strong Magnetic Field Via Hydrodynamics & Holography
… poles of the two-point functions of the energy-momentum tensor and axial current operators, encoding information about the dissipation and transport of charges in the plasma. I derive general results in the hydrodynamic field theory and confirm them by explicit solutions in the dual gravity …
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A classical view of the quantum vacuum
… view of an old problem concerning the energy-momentum tensor of light. In the context of light interacting with a medium two rival forms exist of the energy-momentum exist, each supposedly supported by theoretical and experimental evidence. By translating the problem to nonlinear …
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Testing General Relativity with the next generation of cosmological surveys
… analysis, we investigate the Horndeski scalar-tensor theories and beyond which has been recently described in the generilized dark energy (DE) or scalar-tensor paradigm - dubbed unified dark energy (UDE). This applies the 3+1 Arnowitt-DeserMisner (ADM) formalism where a general action in …
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The power spectrum and bispectrum of inflation and cosmic defects
… time correlators from components of the energy-momentum tensor of the defects. We use these spectra together with CMB likelihoods to obtain constraints on the energy scales of formation of the cosmic defects, finding $G\mu/c^{2} < 1.29 \times 10^{−7}$ and $\eta < 0.93$ MeV (at 95% confidence …
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Quantum Fields on BTZ Black Holes
… the expectation value of the renormalized energy-momentum tensor in 1+1 dimensions for the conformal massless quantum real scalar field. Most of this thesis fits in the framework of AdS/CFT in QFT which is more limited than AdS/CFT correspondence in string theory.