Coherence and Emergence of Classical Spacetime
Sang Pyo Kim(Kunsan National University),Jeong-Young Ji, Hak-Soo Shin,, Kwang-Sup Soh(Seoul National University)
TL;DR
This paper demonstrates how the classical Einstein equation for an FRW cosmological model with a scalar field can be derived from semiclassical quantum gravity using coherent states.
Contribution
It introduces a method to derive classical Einstein equations from quantum gravity in cosmological settings using coherent-state representation.
Findings
Classical Einstein equations obtained from semiclassical quantum gravity.
Coherent-state representation effectively bridges quantum and classical descriptions.
Applicable to FRW models with scalar fields.
Abstract
Using the coherent-state representation we show that the classical Einstein equation for the FRW cosmological model with a general minimal scalar field can be derived from the semiclassical quantum Einstein equation.
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