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Showing 1 to 20 of 50 for “"Lifshitz"”.
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Renormalisation Group Flows in Lifshitz Holography
… field theories with conformal symmetries and the Lifshitz scaling symmetries. These take the form of spacetimes with a region asymptoting to AdS and another asymptoting to the Lifshitz metric of [1], with some domain wall smoothly interpolating between these regions. We first review the AdS/CFT …
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Two-dimensional Hořava-Lifshitz theory of gravity.
In this dissertation, two-dimensional Hařava theory of gravity has been studied on the classical and quantum mechanical levels. The classical solutions of the projectable and nonprojectable Hořava gravity have been found and their spacetime structures are investigated in terms of Penrose diagrams. …
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Lifshitz transitions in RCo5 (R=Y, La) and in Osmium
… the Fermi surface. The latter are called "Lifshitz transitions". Lifshitz transitions are an interesting subject to study because a topological change of the Fermi surface results in a van Hove singularity of the density of states at the Fermi energy, which again induces an anomaly in …
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Reflections on general relativity from perspectives of black hole physics and Hořava-Lifshitz gravity.
… which has no singularity inside the body. Hořava-Lifshitz theory, proposed by some physicists as an attempt to fix the quantization problem of general relativity, is employed in the study of a holography problem.
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Radiation reaction in strong fields from an alternative perspective
… and violation of causality. The Landau-Lifshitz approximation to the exact equation introduced by Lorentz, Abraham and Dirac is widely used, though questions remain regarding its domain of validity. This thesis explores an alternative treatment of the motion of a radiating electron, …
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Chirality-dependent, van der Waals-London dispersion interactions of carbon nanotube systems
The Lifshitz formulation is a quantum electrodynamic, first principals formulation used to determine van der Waals - London dispersion interactions in the continuum limit. It has many advantages over crude, pairwise potential models. Most notably, it can solve for complex interactions (e.g. …
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Holographic view of non-relativistic physics
… part of the thesis we study gravity duals of Lifshitz theories. These are non-relativistic scale invariant theories that are not boost invariant. These theories do not have a particle number symmetry unlike the boost invariant NRCFTs. We present solutions of 1OD and 111D supergravity theories …
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Large Deviations and Higher Order Fluctuation Expansions for Conservative Stochastic PDEs
… We studied large deviations for the Landau-Lifshitz-Navier-Stokes equations and higher-order fluctuation expansions for stochastic heat equations, respectively, in order to show the consistency of fluctuating hydrodynamic equations and interacting particle systems. Moreover, we provide …
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Holography for the practical person
… the Einstein-Maxwell dilaton (EMD) action for Lifshitz spacetime characterized by a dynamical critical exponent $z$. We compute the fully renormalized static Lifshitz thermodynamic potential explicitly, which confirms the forms of all thermodynamic quantities including the Bekenstein-Hawking …
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Investigation of short-range surface forces to develop self-organizing devices by Steven M. Tobias.
… on the van der Waals contribution described by Lifshitz theory and the polar contribution described by electron donor and acceptor components. This new type of device assembly process can be self-organizing based on the principle of like particle attraction and dissimilar particle repulsion. A …
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Application of the Coupled Dipole Method for Predicting Swelling and Exfoliation Behavior of Layered Inorganic Materials
… cases. Among the various theoretical methods, Lifshitz theory is successful and popular due to its solid theoretical foundation and satisfying accuracy at length scales greater than 5 nm. However, the Lifshitz theory has two significant drawbacks: it is exact only for a few special geometries, …
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Quantum simulations on square and triangular Hubbard models
… as control parameters, there is a line of Lifshitz transition associated with the change of topology of the Fermi surface. Along the Lifshitz line with t'<=0, the marginal Fermi liquid region prevails, the peak of density of states crosses the Fermi level, and the bare d-wave pairing …
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New Classical Solutions in Supergravity
… number of String/M theory solutions that have Lifshitz or Schrodinger scaling symmetry, obtained from marginally deforming the geometry of internal dimensions of previous solutions. We propose that these new solutions are dual to marginal deformations of certain holographic non-relativistic …
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The plastic deformation of alloys based on aluminum titanide
… data which allows the concentration terms in the Lifshitz, Slyozov and Wagner coarsening equation to be calculated. Predictions show that a dispersion will exhibit a greater thermal stability when in a matrix with an excess concentration of oxygen (with respect to that necessary to form the …
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Templated Multiferroic Nanocomposites by Ion-Lithography
… is built based on the weak formulation of Landau-Lifshitz-Gilbert (LLG) equation. Magnetic properties of single crystal CFO are modeled.
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Emergence of charge density wave domain walls above the superconducting dome in TiSe2
… CDW phase, suggesting the presence of a Lifshitz tricritical point somewhere above the superconducting dome. Our study suggests that SC in 1T-TiSe2 may not be directly connected to the QCP of the CDW order, but to the formation of CDW domain walls.
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Electronic properties of bilayer graphene in a steady magnetic field
… consider the effect of the magnetic field on the Lifshitz transition, in which the Fermi surface breaks up into separate pockets at very low energy, due to trigonal warping. We show that the predicted band structure is dramatically altered when taking the new magnetic field contribution into …
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The Hofstadter spectrum of monolayer and bilayer graphene van der Waals heterostructures with boron nitride
… in the band structure, which is known as a Lifshitz transition. Furthermore, depending on the magnitude and the direction of the field within the plane of the graphene layers, it is possible to access different phase regions of the band structure. We also model the electronic transport …
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Aspects of Black Hole Physics: Scalar Sources, Holography and Gravitational Wave Emission
… vanishing potential, which are conformal to the Lifshitz spacetime; we discuss the symmetries and their holographic application for hyperscaling violation; we also give a quite general classification of brane solutions sourced by scalar fields useful for holographic applications. We study an …
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Dynamik und thermische Diffusion von Solitonen in ein- und zweidimensionalen Heisenbergmagneten
… die 1-Soliton-Lösung der anisotropen Landau-Lifshitz-Gleichung beschrieben. Die Ankopplung des Systems an ein Wärmebad wird durch weißes Rauschen und Gilbert-Dämpfung modelliert. Das Rauschen verursacht Veränderungen in der Struktur und Position des Solitons und produziert Magnonen. Unter …
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