Seminar detail: Bulk reconstruction and gauge invariance

Date&Time	Tue Jan 14 2025 (17:00 - 18:00)
Speaker	Sotaro Sugishita
Affiliation	Kyoto U
Title	Bulk reconstruction and gauge invariance
Abstract	We discuss the concept of bulk reconstruction, which involves mapping bulk operators into CFT operators to understand the emergence of spacetime and gravity. We argue that the N=infinity approximation fails to capture crucial aspects of gravity, as it does not respect gauge invariance and lacks direct connections between energy and boundary metrics. Key concepts such as entanglement wedge reconstruction and holographic error correction codes, which are based on the N=infinity theory, may be incorrect or require significant revision when finite N effects are considered. We present explicit examples demonstrating discrepancies in bulk reconstructions and suggest that a gauge-invariant approach is necessary for an accurate understanding.
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