Constructs charged multi-sheet wormhole solutions in 4D Einstein-Maxwell-massless phantom scalar gravity via Harrison transformation, demonstrating regular solutions exist beyond the Q_e² + Q_m² < M² bound with throat radius fixed by regularity.
Black diholes
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abstract
We present and analyze exact solutions of the Einstein-Maxwell and Einstein-Maxwell-Dilaton equations that describe static pairs of oppositely charged extremal black holes, i.e., black diholes. The holes are suspended in equilibrium in an external magnetic field, or held apart by cosmic strings. We comment as well on the relation of these solutions to brane-antibrane configurations in string and M-theory.
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gr-qc 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
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Charged multi-sheet wormhole solutions
Constructs charged multi-sheet wormhole solutions in 4D Einstein-Maxwell-massless phantom scalar gravity via Harrison transformation, demonstrating regular solutions exist beyond the Q_e² + Q_m² < M² bound with throat radius fixed by regularity.