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Wormholes Threaded by Chiral Fields

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.

preprint2013arXivOpen access
Efstathios CharalampidisTheodora IoannidouBurkhard KleihausJutta Kunz
gr-qchep-th
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Efstathios CharalampidisTheodora IoannidouBurkhard KleihausJutta Kunz

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