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On quantum corrections to geodesics in de-Sitter spacetime

Emelyanov, Viacheslav A.

We find a coordinate-independent wave-packet solution of the massive Klein–Gordon equation with the conformal coupling to gravity in the de-Sitter universe. This solution can locally be represented through the superposition of positive-frequency plane waves at any space-time point, assuming that the scalar-field mass M is much bigger than the de-Sitter Hubble constant H. The solution is also shown to be related to the two-point function in the de-Sitter quantum vacuum. Moreover, we study the wave-packet propagation over cosmological times, depending on the ratio of M and H. In doing so, we find that this wave packet propagates like a point-like particle of the same mass if $\mathbb{M}$ ⋙$\mathbb{H}$ , but, if otherwise, the wave packet behaves highly non-classically.

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Verlagsausgabe §
DOI: 10.5445/IR/1000130515
Veröffentlicht am 19.03.2021
DOI: 10.1140/epjc/s10052-021-08979-z
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Theoretische Physik (ITP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1434-6044, 1434-6052
KITopen-ID: 1000130515
Erschienen in European Physical Journal C
Verlag Springer Verlag
Band 81
Heft 2
Seiten Art.-Nr.: 189
Nachgewiesen in Scopus
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