3 papers
gr-qc2026
Rotating wormholes in five dimensions with equal angular momenta: large asymmetry regime
Keiya Uemichi, Yasutaka Koga, Daiki Saito +2
We clarify the relationship between rotation and the energy condition for stationary rotating wormhole solutions of the Einstein equations coupled to a phantom field in five-dimens…
gr-qc2026
Dynamical Formation of Self-Similar Wormholes
Yasutaka Koga, Ryota Maeda, Daiki Saito +1
We study spherically symmetric, self-similar wormhole solutions supported by colliding streams of negative-energy null dust, and their dynamical formation. Under the assumption of…
gr-qc2025
Dynamical Formation of Charged Wormholes
Yasutaka Koga, Ryota Maeda, Daiki Saito +2
We construct static, spherically symmetric, charged traversable wormhole solutions to the Einstein--Maxwell equations, supported by bidirectional (ingoing and outgoing) null dust w…