  Ground-state energies of the one- and two-electron uranium dimers are
calculated for internuclear distances in the range D=40--1000 fm and compared
with the previous calculations. The generalization of the dual-kinetic-balance
approach for axially symmetric systems is employed to solve the two-center
Dirac equation without the partial-wave expansion for the potential of two
nuclei. The one-electron one-loop QED contributions (self-energy and vacuum
polarization) to the ground-state energy are evaluated using the monopole
approximation for the two-center potential. Interelectronic interaction of the
first and second order is taken into account for the two-electron
quasimolecule. Within the QED approach one-photon-exchange contribution is
calculated in the two-center potential, while the two-photon-exchange
contribution is treated in the monopole approximation.
