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In Search Of Consistent Classical Theories of Gravity

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dc.contributor.advisor Minwalla, Shiraz en_US
dc.contributor.author GOPALKA, TUSHAR en_US
dc.date.accessioned 2020-06-15T07:19:40Z
dc.date.available 2020-06-15T07:19:40Z
dc.date.issued 2020-05 en_US
dc.identifier.uri http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4708
dc.description.abstract General Relativity has provided us a successful framework to describe gravity and has passed numerous experimental as well as theoretical consistency conditions. However, general relativity can possibly be modified by a large class of high energy corrections. In this project, we try to constrain the space of all kinematically allowed classical gravitational theories based on certain consistency conditions. We explicitly construct the basis tree-level S-matrices for four graviton and four-photon scattering in all spacetime dimensions. From the space of possible S-matrices, the consistency condition used to rule out possible S-matrices is a conjecture, called as the Classical Regge Growth Conjecture (CRG conjecture). This conjecture puts a restriction on the growth of any classical (tree-level) S-matrix in the Regge limit. Assuming the CRG conjecture to be true, we find that Einstein gravity is the unique classical theory of gravity in spacetime dimensions less than equal to six. In the latter part of the project, we classify all possible 3 point S-matrices quadratic in photons or gravitons en_US
dc.language.iso en en_US
dc.subject Gravity en_US
dc.subject Quantum Field Theory en_US
dc.subject S-matrix en_US
dc.subject String Theory en_US
dc.subject 2020 en_US
dc.title In Search Of Consistent Classical Theories of Gravity 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 20151019 en_US


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  • MS THESES [1705]
    Thesis submitted to IISER Pune in partial fulfilment of the requirements for the BS-MS Dual Degree Programme/MSc. Programme/MS-Exit Programme

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