Phys. Rev. D 44, 3109–3115 (1991)Gravitational breather and topological properties of gravisolitonsReceived 31 May 1991; published in the issue dated 15 November 1991 It is shown that for a wide class of cosmological solutions to the vacuum Einstein equations the notions of gravisolitons and antigravisolitons with respect to some topological charge can be introduced. The presence of attractive forces between two gravitational solitons with charges of opposite signs and repulsive forces between solitons of the same charges is shown. The construction of the gravitational breather as a bound state of the gravisoliton and antigravisoliton is described. © 1991 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.44.3109
DOI:
10.1103/PhysRevD.44.3109
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