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Field theory aspects of cosmology and black holes
Field theory aspects of cosmology black holes
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2010/12/24
In this thesis we study some aspects of cosmology and black holes using field theoretic techniques. In second chapter, we present Lagrangian formulation for the non-relativistic as well as relativisti...
Yangian Superalgebras in Conformal Field Theory
Yangian Superalgebras Conformal Field Theory
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2010/12/24
Quantum Yangian symmetry in several sigma models with supergroup or supercoset as target is established. Starting with a two-dimensional conformal field theory that has current symmetry of a Lie supe...
Field theory description of neutrino oscillations
Field theory description neutrino oscillations
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2010/12/27
We review various field theory approaches to the description of neutrino oscillations in vacuum and external fields. First we discuss a relativistic quantum mechanics based approach which involves th...
Geometric quantization and the metric dependence of the self-dual field theory
Geometric quantization self-dual field theory
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2010/12/24
We investigate the metric dependence of the partition function of the self-dual p-form gauge field on an arbitrary Riemannian manifold. Using geometric quantization of the space of middle-dimensional...
Effective Field Theory and High-Precision Calculations of Nuclear Electroweak Processes
Effective Field Theory High-Precision Calculations Nuclear Electroweak Processes
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2010/12/29
High-precision calculations of electroweak processes in light nuclei are of great importance for multiple reasons. Gerry Brown together with Dan-Olof Riska published in 1972 a famous calculation on ra...
Quantum Field Theory, Black Holes and Holography
Quantum Field Theory Black Holes Holography
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2010/12/24
These notes are an expanded version of lectures given at the Croatian School on Black Holes at Trpanj, June 21-25, 2010. The aim is to provide a practical introduction to quantum field theory in curv...
On the structure of the S-matrix in general boundary quantum field theory in curved space
the S-matrix quantum field theory
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2010/12/23
We use the general boundary formulation (GBF) of quantum field theory to compute the S-matrix for a general interacting scalar field in curved spacetime. This S-matrix is obtained as the asymptotic li...
Topological BF field theory description of topological insulators
Topological BF field theory description topological insulators
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2010/12/27
Topological phases of matter are described universally by topological field theories in the same way that symmetry-breaking phases of matter are described by Landau-Ginzburg field theories. We propos...
Entanglement entropy of two disjoint intervals in conformal field theory II
Entanglement entropy disjoint intervals conformal field theory II
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2010/12/24
We continue the study of the entanglement entropy of two disjoint intervals in conformal field theories that we started in J. Stat. Mech. (2009) P11001. We compute Tr\rho_A^n for any integer n for the...
Symmetric Criticality in Classical Field Theory
Symmetric Criticality Classical Field Theory
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2010/12/27
This is a brief overview of work done by Ian Anderson, Mark Fels, and myself on symmetry reduction of Lagrangians and Euler-Lagrange equations, a subject closely related to Palais' Principle of Symmet...
Symmetries and Strings in Field Theory and Gravity
Symmetries Strings in Field Theory
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2010/12/24
We discuss aspects of global and gauged symmetries in quantum field theory and quantum gravity, focusing on discrete gauge symmetries. An effective Lagrangian description of $\Z_p$ gauge theories sho...
Weak Pion and Photon Production off Nucleons in a Chiral Effective Field Theory
Weak Pion Photon Production off Nucleons Chiral Effective Field Theory
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2011/1/7
Neutrino-induced pion and photon production from nucleons and nuclei are important for the
interpretation of neutrino-oscillation experiments, and these processes are potential backgrounds in the Min...
Holographic dual of free field theory
Holographic dual free field theory
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2010/12/24
We derive a holographic dual description of free quantum field theory in arbitrary dimensions, by reinterpreting the exact renormalization group, to obtain a higher spin gravity theory of the general ...
Differential geometry with a projection: Application to double field theory
Differential geometry projection field theory
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2010/12/23
In recent development of double field theory, as for the description of the massless sector of closed strings, the spacetime dimension is formally doubled, i.e. from D to D+D, and the T-duality is re...
The Hamiltonian constraint in Polymer Parametrized Field Theory
The Hamiltonian constraint Polymer Parametrized Field Theory
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2010/12/27
Recently, a generally covariant reformulation of 2 dimensional flat spacetime free scalar field theory known as Parameterised Field Theory was quantized using Loop Quantum Gravity (LQG) type `polymer...