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Clues from the late-time boundary of de Sitter

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In this talk we will introduce operators at the late-time boundary of de Sitter that capture the late time physics of scalar fields, and focus on their two-point functions. We will refer to these operators as late-time operators. We will discuss certain properties which make them recognizable as the unitary irreducible representations of the de Sitter group SO(d+1,1), and their contribution to scalar field and conjugate momentum two-point functions computed using both wavefunction and canonical quantization methods. By focusing on these late-time operators and their correlation functions our goal is to gather clues about the holographic aspects of de Sitter spacetime guided by group theoretical notions.

This talk is part of the Cosmology Lunch series.

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