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Electrostatic multipole interactions generate long-range Rydberg-Rydbergmacrodimer. We calculate the adiabatic potentials of cesium $(nD_{J})_2$Rydberg macrodimers for principal quantum numbers $n$ ranging from 56 to 62,for $J=3/2$ and $5/2$, and for the allowed values of the conserved sum of theatomic angular-momentum components along the internuclear axis, $M$. For mostcombinations $(n, M, J)$ exactly one binding potential exists, which shouldgive rise to Rydberg macrodimer states. We study the dependence of theadiabatic potentials on the size of the two-body basis sets used in thecalculation, and on the maximal order, $q_{max}$, of the multipole termsincluded in the calculation. We determine the binding energies and lengths ofthe binding adiabatic potentials, and investigate their scaling behaviors as afunction of the effective principal quantum number; these parameters arerelevant to experimental preparation of Rydberg-atom macrodimers. Avoidedcrossings between adiabatic potentials affect the well shapes and the scalingbehaviors differently in two distinct domains in $n$. We discuss anexperimental scheme for preparing $(nD_J)_2$ Rydberg-atom macrodimers usingtwo-color double-resonant photoassociation.

Adiabatic potentials of cesium $(nD_J)_2$ Rydberg-Rydberg macrodimers