Martedì 28 novembre 2023, alle ore 15:00 su Zoom, nell'ambito del Progetto Prin Lecce-Napoli, il Prof. Sourav Sarkar (Uppsala University) terrà un seminario dal titolo:
An exact solution to the cosmological bootstrap using 6j symbols
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Abstract: We shall consider a crossing equation of the Euclidean conformal group in terms of conformal partial waves and in particular, a position independent representation of this equation. We shall briefly discuss the relevance of this equation to the problem of cosmological bootstrap. Thereafter, we shall sketch the derivation of the Biedenharn-Elliot identity (a pentagon identity) for the 6j symbols of the conformal group and show how this provides us with an exact solution to said crossing equation. For the conformal group (which is non-compact), this involves some careful bookkeeping of the spinning representations. Finally, we shall discuss some consistency checks on the result obtained, and some open questions.
Ref. Prof. Claudio Corianò