Stable Lorentzian Wormholes in Dilatonic Einstein-Gauss-Bonnet Theory
  We discuss the properties of Lorentzian wormholes in dilatonic Einstein-Gauss-Bonnet theory in four spacetime dimensions. These wormholes do not need any form of exotic matter for their existence. A subset of these wormholes is shown to be linearly stable with respect to radial perturbations. We perform a comprehensive study of their domain of existence, and derive a generalised Smarr relation for these wormholes. We also investigate their geodesics determining all possible particle trajectories, and perform a study of the acceleration and tidal forces that a traveler crossing the wormhole would feel. 
Panagiota Kanti, Burkhard Kleihaus, Jutta Kunz
hep-th astro-ph.CO gr-qc