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DC Field | Value | Language |
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dc.contributor.advisor | Laddha, Alok | en_US |
dc.contributor.author | BADHANI, HIMANSHU | en_US |
dc.date.accessioned | 2016-05-04T07:50:44Z | |
dc.date.available | 2016-05-04T07:50:44Z | |
dc.date.issued | 2016-05 | en_US |
dc.identifier.uri | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/602 | - |
dc.description.abstract | In this thesis we analyze interacting massive scalar fields in de-Sitter space, specifically the issue of infrared divergences which cause the conventional in-out perturbation theory inapplicable. We then review the use of Schwinger-Keldysh formalism which is the most reliable tool to study non-equilibrium systems like QFT in de-Sitter spacetime. We review the previous work on correlation functions (specifically the propagators) the re-summation of propagators and use the technique to show that the propagators calculated have well defined flat-space limit. Next, we discuss the work done on the construction of an S-matrix on the global de sitter space and provide our own construction of an S-matrix in the expanding Poincaré patch. We show that our S-matrix shows good behavior under CPT operation, is unitary and has the expected flat space limit. | en_US |
dc.description.sponsorship | INSPIRE 2011-2016, DST, Gov. of India | en_US |
dc.language.iso | en | en_US |
dc.subject | 2016 | |
dc.subject | Infrared Divergences | en_US |
dc.subject | S-Matrix | en_US |
dc.subject | LSZ Formulation | en_US |
dc.title | Quantum Fields in de Sitter Space | en_US |
dc.type | Thesis | en_US |
dc.type.degree | BS-MS | en_US |
dc.contributor.department | Dept. of Physics | en_US |
dc.contributor.registration | 20111061 | en_US |
Appears in Collections: | MS THESES |
Files in This Item:
File | Description | Size | Format | |
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thesis_20111061.pdf | 1.18 MB | Adobe PDF | View/Open |
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