Light wave propagation through a dilaton-Maxwell domain wall
  We consider the propagation of electromagnetic waves through a
dilaton-Maxwell domain wall of the type introduced by Gibbons and Wells [G.W.
Gibbons and C.G. Wells, Class. Quant. Grav. 11, 2499-2506 (1994)]. It is found
that if such a wall exists within our observable universe, it would be absurdly
thick, or else have a magnetic field in its core which is much stronger than
observed intergalactic fields. We conclude that it is highly improbable that
any such wall is physically realized.
