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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Hellmann-Feynman theorem in some classical field theories by François Bégin.

Bégin, François January 1986 (has links)
No description available.
12

On a class of completely integrable classical field theories

David, Daniel January 1982 (has links)
No description available.
13

Visualization of field problems by interactive computer graphics.

January 1989 (has links)
by Kenneth Y.P. Lee. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1989. / Bibliography: leaves 120-123.
14

On topological objects in field theory

Teh, Nicholas Joshua Yii Wye January 2012 (has links)
No description available.
15

Temperature, topology and quantum fields

Kulikov, Igor Konstantinovich 05 1900 (has links)
No description available.
16

A study of the zero rest-mass fields in general relativity / by P. A. Bell

Bell, Peter Alexander January 1974 (has links)
238 p. ; 26 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Mathematical Physics, 1974
17

Algebraic structure of degenerate systems /

Grundling, Hendrik. January 1986 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Mathematical Physics,1986. / Erratum (14 leaves) in pocket. Includes bibliographical references (leaves 124-128).
18

Toric geometry and F-theory/heterotic duality in six dimensions /

Rajesh, Govindan, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 80-84). Available also in a digital version from Dissertation Abstracts.
19

Anomalous commutators and the BJL limit

Rogers, Duncan M. January 1987 (has links)
The BJL limit is derived and used to calculate the anomalous vector current commutator in QED. It is then shown, by a calculation with the BJL limit for double commutators, that the Jacobi identity fails for two vector currents and one axial vector current in QED. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
20

Computational methods in string and field theory

Pontiggia, Luca Terzio January 2018 (has links)
Thesis is submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the University of the Witwatersrand, Faculty of Science, School of Physics, University of the Witwatersrand, Johannesburg, 2018 / Like any field or topic of research, significant advancements can be made with increasing computational power - string theory is no exception. In this thesis, an analysis is performed within three areas: Calabi–Yau manifolds, cosmological inflation and application of conformal field theory. Critical superstring theory is a ten dimensional theory. Four of the dimensions refer to the spacetime dimensions we see in nature. To account for the remaining six, Calabi-Yau manifolds are used. Knowing how the space of Calabi-Yau manifolds is distributed gives valuable insight into the compactification process. Using computational modeling and statistical analysis, previously unseen patterns of the distribution of the Hodge numbers are found. In particular, patterns in frequencies exhibit striking new patterns - pseudo-Voigt and Planckian distributions with high confidence and exact fits for many substructures. The patterns indicate typicality within the landscape of Calabi–Yau manifolds of various dimensions. Inflation describes the exponential expansion of the universe after the Big Bang. Finding a successful theory of inflation centres around building a potential of the inflationary field, such that it satisfies the slow-roll conditions. The numerous ways this can be done, coupled with the fact that each model is highly sensitive to initial conditions, means an analytic approach is often not feasible. To bypass this, a statistical analysis of a landscape of thousands of random single and multifield polynomial potentials is performed. Investigation of the single field case illustrates a window in which the potentials satisfy the slow-roll conditions. When there are two scalar fields, it is found that the probability depends on the choice of distribution for the coefficients. A uniform distribution yields a 0.05% probability of finding a suitable minimum in the random potential whereas a maximum entropy distribution yields a 0.1% probability. The benefit of developing computational tools extends into the interdisciplinary study between conformal field theory and the theory of how wildfires propagate. Using the two dimensional Ising model as a basis of inspiration, computational methods of analyzing how fires propagate provide a new tool set which aids in the process of both modeling large scale wildfires as well as describing the emergent scale invariant structure of these fires. By computing the two point and three point correlations of fire occurrences in particular regions within Botswana and Kazakhstan, it is shown that this proposed model gives excellent fits, with the model amplitude being directly proportional to the total burn area of a particular year. / EM2018

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