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We study the effect of a strong static homogeneous electric field on thehighly excited rovibrational levels of the LiCs dimer in its electronic groundstate. Our full rovibrational investigation of the system includes theinteraction with the field due to the permanent electric dipole moment and thepolarizability of the molecule. We explore the evolution of the states next tothe dissociation threshold as the field strength is increased. The rotationaland vibrational dynamics are influenced by the field; effects such asorientation, angular motion hybridization and squeezing of the vibrationalmotion are demonstrated and analyzed. The field also induces avoided crossingscausing a strong mixing of the electrically dressed rovibrational states.Importantly, we show how some of these highly excited levels can be shifted tothe continuum as the field strength is increased, and reversely how two atomsin the continuum can be brought into a bound state by lowering the electricfield strength.

Impact of Electric Fields on Highly Excited Rovibrational States of Polar Dimers