  We observe that when an ultracold ground state cesium (Cs) atom becomes bound
within the electronic cloud of an extended Cs electronic orbit, ultralong-range
molecules with giant (kilo-Debye) permanent electric dipole moments form. Large
molecular permanent electric dipole moments are challenging to experimentally
realize. Meeting this challenge has garnered significant interest because
permanent electric dipole moments are important for understanding symmetry
breaking in molecular physics, control of chemical reactions and realization of
strongly correlated many-body quantum systems. These new hybrid class of
`trilobite' molecules are predominated with degenerate Rydberg manifolds,
making them difficult to produce with conventional optical association. Their
behavior is quantitatively reproduced with detailed coupled-channel
calculations.
