



01193nas a2200145   4500008004100000245012200041210006900163260001400232490000700246520068300253100002200936700002300958700002300981856004301004       2004                        eng d00aRelativistic many-body calculations of electric-dipole matrix elements,  lifetimes and polarizabilities in rubidium
0 aRelativistic manybody calculations of electricdipole matrix elem  c2004/2/270 v693 a  Electric-dipole matrix elements for ns-n'p, nd-n'p, and 6d-4f transitions in
Rb are calculated using a relativistic all-order method. A third-order
calculation is also carried out for these matrix elements to evaluate the
importance of the high-order many-body perturbation theory contributions. The
all-order matrix elements are used to evaluate lifetimes of ns and np levels
with n=6, 7, 8 and nd levels with n=4, 5, 6 for comparison with experiment and
to provide benchmark values for these lifetimes. The dynamic polarizabilities
are calculated for ns states of rubidium. The resulting lifetime and
polarizability values are compared with available theory and experiment.
1 aSafronova, M., S.1 aWilliams, Carl, J.1 aClark, Charles, W.  uhttp://arxiv.org/abs/physics/0307057v101061nas a2200145   4500008004100000245004500041210004500086260001400131490000700145520065100152100002200803700002300825700002300848856004400871       2003                        eng d00aOptimizing the fast Rydberg quantum gate0 aOptimizing the fast Rydberg quantum gate  c2003/4/170 v673 a  The fast phase gate scheme, in which the qubits are atoms confined in sites
of an optical lattice, and gate operations are mediated by excitation of
Rydberg states, was proposed by Jaksch et al. Phys. Rev. Lett. 85, 2208 (2000).
A potential source of decoherence in this system derives from motional heating,
which occurs if the ground and Rydberg states of the atom move in different
optical lattice potentials. We propose to minimize this effect by choosing the
lattice photon frequency \omega so that the ground and Rydberg states have the
same frequency-dependent polarizability \alpha(omega). The results are
presented for the case of Rb.
1 aSafronova, M., S.1 aWilliams, Carl, J.1 aClark, Charles, W.  uhttp://arxiv.org/abs/quant-ph/0212081v1