Analysis of long-range Cs Rydberg potential wells

We analyse bound states at long-range (R similar to 5 mu m) for pairs of Cs atoms in the 89D and neighbouring states. These wells are due solely to avoided crossings between the van der Waals pair interaction potentials. The depth of the wells is similar to 40 MHz, and vibrational spectra consist of hundreds of bound states. We present detailed calculations of the properties of two of these wells at different electric fields (similar to mV cm(-1)), since the electric field changes the well depth and shape. We estimate bound-state lifetimes similar to 400 mu s, lineshapes, and two-photon excitation and detection rates similar to Hz from the 6P state at a temperature of T = 40 mu K for these molecules.