We have excited helium atoms from their metastable 2 3S state to Rydberg states in the range 13 < n < 50 in a two-step process via the 3 3P state using light at λ = 389 nm and 785–815 nm. Atoms in a thermal beam (100 K) cross partially overlapping laser beams of the appropriate frequencies in the counterintuitive order to exploit the high efficiency of stimulated rapid adiabatic passage. The in...

The structure of low-n Rydberg states doped into supercritical fluids represents an important probe to investigate solvation effects, especially near the solvent (or perturber) critical point. We have investigated the solvation of dopant low-n Rydberg states in various perturbing fluids. This systematic study was performed from low perturber number densities to the density of the triple point l...

IR+UV double resonant ion-dip and ion-enhancement spectroscopies are employed to study the nu3 asymmetric CH stretch vibration fundamental of CH3 in the ground and 3p(z) Rydberg electronic states. CH3 radical is synthesized in the supersonic jet expansion by flash pyrolysis of azomethane (CH3NNCH3) prior to the expansion. The Q band of the 3(1) (1) 3p(z)<--X transition of CH3, not detected by c...

We propose a long-lived and rapidly accessible quantum memory unit, for which the operational Hilbert space is spanned by states involving the two macroscopically occupied hyperfine levels of a miscible binary atomic Bose-Einstein condensate and the Rydberg state of a single atom. It is shown that an arbitrary qubit state, initially prepared using a flux qubit, can be rapidly transferred to and...

We observe long-range “trilobite-like” states of ultracold 85Rb2 molecules in which a novel form of chemical bonding occurs: an ultracold ground state atom is bound by the attraction of the Rydberg electron, with its Rydberg electronic wavefunction in np Rydberg atomic levels with n = 7-12 [1]. Unlike earlier work by others at much higher n formed by photoassociation, our observations involve b...

We provide a universal discussion of the interplay between Rydberg-state electromagnetically induced transparency (EIT) and optical pumping (OP) in thermal Rb87 medium. By population to one single Hyperfine/Zeeman state, we can enhance interaction strength and, principle, amplify EIT peak. According our measurements, peak height be improved by factor two or reduced order magnitude, linewidth wa...

Ab initio calculations have been carried out on the potential energy curves of the Rydberg states of NeH up to 3d . Quantum defect functions have been calculated from the ab initio potentials and potential energy curves and vibrational levels for higher n (s ,p ,d) Rydberg states have been generated. The interaction of the 2p B P state with the 2s and 2p , A S and C S states and their predissoc...

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The ground state, singlet! singlet and singlet! triplet vertical excited states of styrene have been studied by using the symmetry adapted cluster-configuration interaction (SAC-CI) method with aug-cc-pVDZ basis sets supplemented with molecule-centered Rydberg functions. The characteristic structures of the bands observed in the vacuum ultraviolet (VUV) and electron energy loss (EEL) spectra ha...