Quantized gravitational waves in the Milne universe

TL;DR

This paper explores the quantization of gravitational waves in the Milne universe, clarifying their relation to Minkowski space and discussing implications for open inflation models.

Contribution

It provides a detailed analysis of gravitational wave quantization in the Milne universe and connects it to Minkowski space, with implications for cosmological inflation scenarios.

Findings

Clarified the relation between gravitational wave modes in Milne and Minkowski universes.

Discussed implications for one-bubble open inflation models.

Enhanced understanding of gravitational wave behavior in expanding universe models.

Abstract

The quantization of gravitational waves in the Milne universe is discussed. The relation between positive frequency functions of the gravitational waves in the Milne universe and those in the Minkowski universe is clarified. Implications to the one-bubble open inflation scenario are also discussed.