Wormholes Threaded by Chiral Fields

Burkhard Kleihaus; Efstathios Charalampidis; Jutta Kunz; Theodora Ioannidou

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Wormholes Threaded by Chiral Fields

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arxiv 1302.5560 v1 pith:ALTA5SYR submitted 2013-02-22 gr-qc hep-th

Efstathios Charalampidis , Theodora Ioannidou , Burkhard Kleihaus , Jutta Kunz This is my paper · ORCID

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keywords chiralfieldswormholescouplingthreadedthroatwormholeanalysis

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We consider Lorentzian wormholes with a phantom field and chiral matter fields. The chiral fields are described by the non-linear sigma model with or without a Skyrme term. When the gravitational coupling of the chiral fields is increased, the wormhole geometry changes. The single throat is replaced by a double throat with a belly inbetween. For a maximal value of the coupling, the radii of both throats reach zero. Then the interior part pinches off, leaving a closed universe and two (asymptotically) flat spaces. A stability analysis shows that all wormholes threaded by chiral fields inherit the instability of the Ellis wormhole.

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