Quasinormal modes of massive scalar fields in four-dimensional wormholes: anomalous decay rate

TL;DR

This paper investigates the quasinormal modes of massive scalar fields in two types of four-dimensional wormholes, revealing an anomalous decay rate in one case and its absence in the other, using advanced computational methods.

Contribution

It introduces the analysis of quasinormal modes in generalized wormholes and identifies anomalous decay behavior specific to certain wormhole geometries.

Findings

Anomalous decay rate observed in the Generalized Bronnikov-Ellis wormhole.

No anomalous decay in the fundamental mode of Morris-Thorne wormhole.

Used WKB and pseudospectral Chebyshev methods for frequency calculations.

Abstract

In this work we consider a Generalized Bronnikov-Ellis wormhole and the tideless Morris-Thorne wormhole and we study the propagation of massive scalar fields. We calculate the quasinormal frequencies using the WKB method and the pseudospectal Chebyshev method and we show the presence of an anomalous decay rate for the quasinormal modes in the Generalized Bronnikov-Ellis wormhole. However, such anomalous behaviour is avoided for the fundamental mode in the Morris-Thorne wormhole background.