• K P Satheesh

      Articles written in Pramana – Journal of Physics

    • Schrödinger picture formalism of Φ6 theory

      K P Satheesh K Babu Joseph

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      The static effective potential for a scalar field with Φ6 interaction is calculated using the effective action in Schrödinger picture formalism. It is found that the effective potential obtained is same as the Gaussian effective potential as far as static case is concerned. Equivalence with the CJT formalism can also be established. As in CJT formalism after renormalization an unrenormalized mass term persists. Nonzero turning points are obtained both for positive and negativeλ. Results are analysed numerically. Graphical analysis indicates a behaviour similar to that obtained for CJT formalism at zero temperature.

    • Finite temperature Cornwall-Jackiw-Tomboulis formalism of Φ6 theory

      K P Satheesh K Babu Joseph

      More Details Abstract Fulltext PDF

      The finite temperature effective potential for a scalar field with Φ6 interaction is calculated by extending the CJT formalism for composite operators. It is found that unrenormalized terms appear in the effective potential due to the presence of an unrenormalized mass term. Nonzero turning points are obtained both for positive and negativeλ. High temperature expansion is performed and the results are analysed numerically. Graphical analysis indicates symmetry restoration whenT→0.

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