Work

Fragileness of exact I -ball/oscillon

Year: 2019

Type: article

Abstract: An $I$-ball/oscillon is a solitonlike oscillating configuration of a real scalar field, and defined as a minimum energy state for a given adiabatic invariant. It lasts for a long time because of the approximate conservation of their adiabatic invariant. In this paper, we examine the stability of a special type of $I$-ball/oscillon, the ``exact'' $I$-ball/oscillon, whose adiabatic invariant is exactly conserved. We show that the exact $I$-ball/oscillon is generally stable in classical field theory, but one with a certain adiabatic invariant is unstable against small perturbations because fluctuations around the exact $I$-ball/oscillon profile have instability bands. Accordingly, the exact $I$-ball/oscillon breaks up in the presence of the fluctuations of corresponding instability modes. We also confirm the fragileness of the exact $I$-ball/oscillon by the classical lattice simulation.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.100.125021

Authors: Masahiro Ibe, Masahiro Kawasaki, Wakutaka Nakano, Eisuke Sonomoto

Institutions: Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo

Language: Latvian

Topic: Nonlinear Waves and Solitons

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science