Spin selection rule for S level transitions in atomic rubidium under paraxial and nonparaxial two-photon excitationWe report on an experimental test of the spin selection rule for two-photon transitions in atoms. In particular, we demonstrate that the 5S1/2 6S1/2 transition rate in a rubidium gas…Krishnapriya Subramonian Rajasree, Ratnesh Kumar Gupta, Vandna Gokhroo et al.·Apr 16, 2020SaveLearn
Quantifying the impact of state mixing on the Rydberg excitation blockadeThe Rydberg excitation blockade has been at the heart of an impressive array of recent achievements; however, state-mixing interactions can compromise its efficiency. When ultracold atoms are excited…Milo Eder, Andrew Lesak, Abigail Plone et al.·Apr 15, 2020SaveLearn
QED corrections to the g factor of Li- and B-like ionsQED corrections to the g factor of Li-like and B-like ions in a wide range of nuclear charges are presented. Many-electron contributions as well as radiative effects on the one-loop level are…H. Cakir, V. A. Yerokhin, N. S. Oreshkina et al.·Apr 14, 2020SaveLearn
Trigonometric identities inspired by atomic form factorWe prove some trigonometric identities involving Chebyshev polynomials of second kind. The identities were inspired by atomic form factor calculations. Generalizations of these identities, if found,…Abhijit Sen, Zurab K. Silagadze·Apr 14, 2020SaveLearn
A tweezer clock with half-minute atomic coherence at optical frequencies and high relative stabilityThe preparation of large, low-entropy, highly coherent ensembles of identical quantum systems is foundational for many studies in quantum metrology, simulation, and information. Here, we realize…Aaron W. Young, William J. Eckner, William R. Milner et al.·Apr 13, 2020SaveLearn
Modeling motional energy spectra and lattice light shifts in optical lattice clocksWe develop a model to describe the motional (i.e., external degree of freedom) energy spectra of atoms trapped in a one-dimensional optical lattice, taking into account both axial and radial…K. Beloy, W. F. McGrew, X. Zhang et al.·Apr 13, 2020SaveLearn
Optical clocks based on the Cf15+ and Cf17+ ionsRecent experimental progress in cooling, trapping, and quantum logic spectroscopy of highly-charged ions (HCIs) made HCIs accessible for high resolution spectroscopy and precision fundamental…S. G. Porsev, U. I. Safronova, M. S. Safronova et al.·Apr 13, 2020SaveLearn
Collisional spin transfer in an atomic heteronuclear spinor Bose gasWe observe spin transfer within a non-degenerate heteronuclear spinor atomic gas comprised of a small 7Li population admixed with a 87Rb bath, with both elements in their F=1 hyperfine spin…Fang Fang, Joshua A. Isaacs, Aaron Smull et al.·Apr 12, 2020SaveLearn
Collective shift in resonant light scattering by a one-dimensional atomic chainWe experimentally study resonant light scattering by a one-dimensional randomly filled chain of cold two-level atoms. By a local measurement of the light scattered along the chain, we observe…Antoine Glicenstein, Giovanni Ferioli, Nikola Sibalic et al.·Apr 11, 2020SaveLearn
Precise pulse shaping for quantum control of strong optical transitionsAdvances of quantum control technology have led to nearly perfect single-qubit control of nuclear spins and atomic hyperfine ground states. In contrast, quantum control of strong optical transitions,…Yudi Ma, Xing Huang, Xiaoqing Wang et al.·Apr 11, 2020SaveLearn
Small recoil momenta double ionization of He and two-electron ions by high energy photonsWe calculate various differential and double differential characteristics of ionization by a single photon for H-, He and for the two-electron ions with Z=3,4,5 in the region of the so-called…Miron Ya. Amusia, Evgeny G. Drukarev, Evgeny Z. Liverts·Apr 10, 2020SaveLearn
Double photoionization of propylene oxide: a coincidence study of the ejection of a pair of valence-shell electronsPropylene oxide, a favorite target of experimental and theoretical studies of circular dichroism, was recently discovered in interstellar space, further amplifying the attention to its role in the…Stefano Falcinelli, Franco Vecchiocattivi, Michele Alagia et al.·Apr 9, 2020SaveLearn
A general penalty method for density-to-potential inversionA general penalty method is presented for the construction of of Kohn-Sham system for given density through Levy's constrained-search. The method uses a functional S[ρ] of one's choice.…Ashish Kumar, Manoj K. Harbola·Apr 7, 2020SaveLearn
Interatomic distance dependence of resonant energy-transfer phenomenaIt is well known that interatomic or intermolecular interactions driven by two-center electronic dipole-dipole correlations fall off rapidly with the inter-site distance. We show, however, that the…F. Grüll, A. B. Voitkiv, C. Müller·Apr 7, 2020SaveLearn
Direct Laser Cooling of a Symmetric Top MoleculeWe report direct laser cooling of a symmetric top molecule, reducing the transverse temperature of a beam of calcium monomethoxide (CaOCH3) to 1.80.7 mK while addressing two distinct nuclear…Debayan Mitra, Nathaniel B. Vilas, Christian Hallas et al.·Apr 6, 2020SaveLearn
Fundamental limit of phase coherence in two-component Bose-Einstein condensatesWe experimentally and theoretically study phase coherence in two-component Bose-Einstein condensates of 87 Rb atoms on an atom chip. Using Ramsey interferometry we measure the temporal…Yifan Li, Krzysztof Pawłowski, Boris Décamps et al.·Apr 6, 2020SaveLearn
Influence of nuclear motion on resonant two-center photoionizationPhotoionization of an atom in the presence of a neighboring atom of different species is studied. The latter first undergoes resonant photoexcitation, leading to an autoionizing state of the diatomic…F. Grüll, A. B. Voitkiv, C. Müller·Apr 6, 2020SaveLearn
Hybrid subconfiguration-average and level-to-level distorted-wave treatment of electron-impact single ionisation of W15+ and W16+Recently, we have demonstrated (Jin et al. 2020, J. Phys. B: At. Mol. Opt. Phys. 53, 075201) that a hybrid subconfiguration-average and level-to-level distorted wave treatment of electron-impact…F. Jin, A. Borovik, B. Ebinger et al.·Apr 6, 2020SaveLearn
Angle-resolved non-resonant two-photon single ionization of argon using 9.3 eV photons produced via high harmonic generationWe present an experimental study on the photoionization dynamics of non-resonant one-color two-photon single valence ionization of neutral argon atoms. Using 9.3 eV photons produced via high harmonic…Kirk A. Larsen, Daniel S. Slaughter, Thorsten Weber·Apr 3, 2020SaveLearn
Newtonian gravitational constant measurement. All atomic variables become extreme when using a source mass consisting of 3 or more partsAtomic interferometry methods used to measure the Newtonian gravitational constant. To improve the accuracy, one should measure the phase of an atomic interferometer at extreme values of atomic…B. Dubetsky·Apr 3, 2020SaveLearn
The effect of orientation of Rydberg atoms on their collisional ionization cross sectionCollisional ionization between two Rydberg atoms in relative motion is examined. A classical trajectory Monte Carlo method is used to determine the cross sections associated with Penning ionization.…Akilesh Venkatesh, Francis Robicheaux·Apr 3, 2020SaveLearn
Real-time ab initio simulation of inelastic electron scattering using the exact, density functional, and alternative approachesTo investigate inelastic electron scattering, which is ubiquitous in various fields of study, we carry out ab initio study of the real-time dynamics of a one-dimensional electron wave packet…Yeonghun Lee, Xiaolong Yao, Massimo V. Fischetti et al.·Apr 3, 2020SaveLearn
Atomic photoionization dynamics in ultrashort cycloidal laser fieldsWe present numerical simulations of ultrafast multiphoton ionization dynamics in a two-dimensional atomic model driven by co- and counterrotating circularly polarized single-color and bichromatic…T. Bayer, Ch. Philipp, K. Eickhoff et al.·Apr 3, 2020SaveLearn
Resonant effect at the ultrarelativistic electron-positron pairs production by gamma quanta in the field of a nucleus and a pulsed light waveResonant electron-positron pair production by a high-energy gamma quantum in the field of a nucleus and a quasi-monochromatic laser wave was theoretically studied. Under the resonant condition an…Sergei P. Roshchupkin, Nikita R. Larin, Victor V. Dubov·Apr 3, 2020SaveLearn
Three-dimensional cooling of an atom beam source for high-contrast atom interferometryWe present a compact, two-stage atomic beam source that produces a continuous, narrow, collimated and high-flux beam of rubidium atoms with sub-Doppler temperatures in three dimensions, which…J. M. Kwolek, C. T. Fancher, M. Bashkansky et al.·Apr 2, 2020SaveLearn