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 599 for “"Field Theory"”.
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Field Theory of Mottness
… can result from this new charge 2e bosonic field. In particular, the (1) mid-infrared band including the nonvanishing of the restricted f-sum rule in the Mott insulator, (2) the T2 contribution to the thermal conductivity, (3) pseudogap, (4) bifurcation of the electron spectrum below the …
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Fractional quantum field theory
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Probabilistic Schwarzian Field Theory
… of stochastic analysis to study a quantum field theory called Schwarzian Theory, which emerged in the studies of two dimensional quantum gravity, black holes, and AdS/CFT correspondence. It is believed that Schwarzian Theory is a holographic dual of the Jackiw--Teitelboim gravity in the two …
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Hyperbolic String Field Theory
This thesis develops string field theory whose elementary interactions are parameterized using hyperbolic geometry. We introduce a systematic procedure to characterize its off-shell data: the local coordinates around punctures on Riemann surfaces as a function of complex structure and the vertex …
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Invertible Functorial Field Theory for Symmetry Breaking and Interactions in Quantum Field Theory
We apply invertible field theories to study two questions in quantum field theory. Specifically, we study reflection-positive fully-extended invertible field theories on manifolds with twisted spin structures, which are computed as Anderson-dual bordism groups [1, 2]. In high energy physics, …
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Tachyon condensation in open string field theory and the {u03B2}{u03B3} conformal field theory
… Schnabl's analytic solution of the string field theory equations in terms of the {u03B2}{u03B3} CFT. Such background-dependent solutions may be useful for the construction of tachyon lump solutions. Using the Schnabl solution's explicit description in terms of coordinate-transformed …
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Tachyon condensation in open string field theory and the {u03B2}{u03B3} conformal field theory
… Schnabl's analytic solution of the string field theory equations in terms of the {u03B2}{u03B3} CFT. Such background-dependent solutions may be useful for the construction of tachyon lump solutions. Using the Schnabl solution's explicit description in terms of coordinate-transformed …
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TOPICS IN QUANTUM FIELD THEORY
… to the change in the zero point energy of the theory due to the presence of a non-vanishing background field. The one loop term is carefully evaluated in Euclidean space, and the positivity of the one-loop eigenvalues is related to classical stability in terms of energy minimality. The case of …
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Community media : field, theory, policy
… to knowledge and the advancement of the academic field of community media within the discipline of media studies. A number of overlapping contexts are summarised: the socio-historical setting in which the practice of electronic community media first emerged; the ‘personal/professional’ context in …
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Non-local gauge field theory
… is a study of Non-Local Gauge Invariant Quantum Field Theory. NonLocal gauge invariance is an extension of the group of local gauge transformations that has been extensively used in construction of physical theories. We show how this larger group is rich enough to accommodate a new theory of …
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Methods for lattice field theory
Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-20T17:11:36Z No. of bitstreams: 1 1980_jongeward.pdf: 2813214 bytes, checksum: 6566d925b9bc16adfabf1e529b16e48a (MD5)
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Topics in double field theory
… on a torus leads to a natural idea that the field theoretical approach of string theory should involve winding type coordinates as well as the usual space-time coordinates. Recently developed double field theory is motivated from this idea and it implements T-duality manifestly by doubling …
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MATRIX FIELD THEORY: APPLICATIONS TO SUPERCONDUCTIVITY
In this thesis a systematic, functional matrix field theory is developed to describe both clean and disordered s-wave and d-wave superconductors and the quantum phase transitions associated with them. The thesis can be divided into three parts. The first part includes chapters 1 to 3. In chapter …
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Non-Hermitian Hamiltonians in Field Theory
This thesis is centred around the role of non-Hermitian Hamiltonians in Physics both at the quantum and classical levels. In our investigations of two-level models we demonstrate [1] the phenomenon of fast transitions developed in the PT -symmetric quantum brachistochrone problem may in fact be …
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Some Asymptotic Results in Field-Theory
Made available in DSpace on 2015-05-12T22:39:00Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7411964.PDF: 3480698 bytes, checksum: 2e174c72b1f62e37aa5a62287401e024 (MD5) Previous issue date: 1973
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Some Asymptotic Results in Field Theory
Submitted by Jesse Garrison (jagarris@illinois.edu) on 2011-11-08T19:47:43Z No. of bitstreams: 1 1973_cahalan.pdf: 4738578 bytes, checksum: f7431e0058e9dacf556ca38c3b3287f3 (MD5)
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String field theory and tachyon condensation
… discuss various aspects of Witten's cubic string field theory. After a brief review of the basics of string field theory we begin by showing how string field theory can be used to check certain conjectures about the tachyon vacuum. We then discuss the problem of trying to globally gauge fix string …
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String field theory and tachyon dynamics
… is motivated by tachyon dynamics in open string theory. We calculate the stress tensors for the p-adic string model and for the pure tachyonic sector of open string field theory (OSFT). We give the energy density of lump solutions and attempt to evaluate the evolution of the pressure in rolling …
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Tachyon condensation in string field theory
… analysis is level truncated open bosonic string field theory We use level truncation to check that the energy difference between the local maximum and the local minimum of the open bosonic tachyon effective potential is equal to the tension of a space-filling D-brane (Sen's first conjecture). Our …
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Quantum gravity and topological field theory
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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