Here we use the quantum number J instead of R, because the rotational motion in the state is not purely the end-over-end rotation.
We calculate and analyze Feshbach resonance spectra for ultracold Yb(1 S0) + Yb(3 P2) collisions as a function of an interatomic potential scaling factor λ and external magnetic field. We show that, at zero field, the resonances are distributed randomly in λ, but that signatures of quantum chaos emerge as a field is applied. The random zero-field… (More)
The far-infrared vibration-rotation spectrum of the out-of-plane DC1 bending band of Ar2-DC1 is observed around 36.0cm-1. The experimental bending frequency, rotational constants and hyperfine coupling constants are compared with the results of calculations employing both pairwise-additive and non-additive interaction potentials. As found previously for… (More)
A general computational method for the accurate calculation of rotationally and vibrationally excited states of tetraatomic molecules is developed. The resulting program is particularly appropriate for molecules executing wide-amplitude motions and isomerizations. The program offers a choice of coordinate systems based on Radau, Jacobi, diatom–diatom and… (More)
We calculate near-threshold bound states and Feshbach resonance positions for atom + rigid-rotor models of the highly anisotropic systems Li+CaH and Li+CaF. We perform statistical analysis on the resonance positions to compare with the predictions of random matrix theory. For Li+CaH with total angular momentum J = 0 we find fully chaotic behavior in both… (More)
Control over all internal and external degrees of freedom of molecules at the level of single quantum states will enable a series of fundamental studies in physics and chemistry 1, 2. In particular, samples of ground-state molecules at ultralow temperatures and high number densities will allow novel quantum-gas studies 3 and future applications in quantum… (More)