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Limits of Relativistic Systems
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
2015 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

We investigate the massless and tensionless limit for the relativistic particle and string respectively. The interaction with interesting background fields, such as the electromagnetic field in the particle case and the Kalb-Ramond field in the string case, are also studied. In order to take the massless- and tensionless limit of the corresponding action, a Hamiltonian field theory is used. The invariances under the Poincar ́e group and diffeomorphisms are of great use, and the Weyl invariance in the string case is found particularly useful, since the background metric can be chosen to be flat without loss of generality. We find it useful to study these systems in the transversal gauge, which is the tensionless correspondence to the conformal gauge, in which the action attains a convenient form. Furthermore, we discuss the physical meaning of some of the results, identify some possible further investigations and also some applications in other fields of physics. 

Place, publisher, year, edition, pages
2015. , 40 p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-255904OAI: diva2:823943
Educational program
Bachelor Programme in Physics
Available from: 2015-06-24 Created: 2015-06-19 Last updated: 2015-06-24Bibliographically approved

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Stålhammar, Marcus
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