Coulomb Expansion of Cold Non-Neutral Rubidium PlasmaWe study the expansion of a cold, non-neutral ion plasma into the vacuum. The plasma is made from cold rubidium atoms in a magneto-optical trap (MOT) and is formed via ultraviolet photoionization. We…Michael A. Viray, Stephanie A. Miller, Georg Raithel·May 14, 2020SaveLearn
Cooling of a Zero-Nuclear-Spin Molecular Ion to a Selected Rotational StateWe demonstrate rotational cooling of the silicon monoxide cation via optical pumping by a spectrally filtered broadband laser. Compared with diatomic hydrides, SiO\+ is more challenging to cool…Patrick R. Stollenwerk, Ivan O. Antonov, Sruthi Venkataramanababu et al.·May 13, 2020SaveLearn
Experimental setup for studying an ultracold mixture of trapped Yb+-6LiWe describe and characterize an experimental apparatus that has been used to study interactions between ultracold lithium atoms and ytterbium ions. The preparation of ultracold clouds of Li atoms is…H. Hirzler, T. Feldker, H. Fürst et al.·May 13, 2020SaveLearn
Laser spectroscopy of indium Rydberg atom bunches by electric field ionizationThis work reports on the application of a novel electric field-ionization setup for high-resolution laser spectroscopy measurements on bunched fast atomic beams in a collinear geometry. In…A. R. Vernon, C. M. Ricketts, J. Billowes et al.·May 12, 2020SaveLearn
Insights from intracules and Coulomb holesWe point out that a typical two-electron distribution function in atoms and molecules often called the intracule depends sensitively on the electron-electron repulsion which leads to the so-called…Golam Ali Sekh, Benoy Talukdar, Supriya Chatterjee·May 12, 2020SaveLearn
Laser cooling in a chip-scale platformChip-scale atomic devices built around micro-fabricated alkali vapor cells are at the forefront of compact metrology and atomic sensors. We demonstrate a micro-fabricated vapor cell that is…J. P. McGilligan, K. R. Moore, A. Dellis et al.·May 12, 2020SaveLearn
Solving the Faddeev-Merkuriev equations in total orbital momentum representation via spline collocation and tensor product preconditioningThe computational approach for solving the Faddeev-Merkuriev equations in total orbital momentum representation is presented. These equations describe a system of three quantum charged particles and…Vitaly A. Gradusov, Vladimir A. Roudnev, Evgeny A. Yarevsky et al.·May 11, 2020SaveLearn
Calculations of QED effects with the Dirac Green functionModern spectroscopic experiments in few-electron atoms reached the level of precision at which an accurate description of quantum electrodynamics (QED) effects is mandatory. In many cases,…Vladimir A. Yerokhin, Anna V. Maiorova·May 11, 2020SaveLearn
Advanced light-shift compensation protocol in a continuous-wave microcell atomic clockLight-shifts are known to be an important limitation to the mid- and long-term fractional frequency stability of different types of atomic clocks. In this article, we demonstrate the experimental…M. Abdel Hafiz, R. Vicarini, N. Passilly et al.·May 11, 2020SaveLearn
Competition between Factors Determining Bright versus Dark Atomic States within a Laser ModeWe observe bimodal fluorescence patterns from atoms in a fast atomic beam when the laser excitation occurs in the presence of a magnetic field and the atoms sample only a portion of the laser…Bryan Hemingway, T. G. Akin, Steven Peil et al.·May 11, 2020SaveLearn
Detection of metastable electronic states by Penning trap mass spectrometryState-of-the-art optical clocks achieve fractional precisions of 10-18 and below using ensembles of atoms in optical lattices or individual ions in radio-frequency traps. Promising candidates…Rima Xenia Schüssler, Hendrik Bekker, Martin Braß et al.·May 11, 2020SaveLearn
Significance of non-linear terms in the relativistic coupled-cluster theory in the determination of molecular propertiesThe relativistic coupled-cluster (RCC) theory has been applied recently to a number of heavy molecules to determine their properties very accurately. Since it demands large computational resources,…V. S. Prasannaa, B. K. Sahoo, M. Abe et al.·May 10, 2020SaveLearn
A superatom picture of collective nonclassical light emission and dipole blockade in atom arraysWe show that two-time, second-order correlations of scattered photons from planar arrays and chains of atoms display nonclassical features that can be described by a superatom picture of the…L. A. Williamson, M. O. Borgh, J. Ruostekoski·May 8, 2020SaveLearn
Sideband Modulation by Sub-Cycle InterferenceWe experimentally and theoretically show that the electron energy spectra strongly depend on the relative helicity in highly intense, circularly polarized two-color laser fields which is an…S. Eckart, D. Trabert, K. Fehre et al.·May 8, 2020SaveLearn
Chiral photoelectron angular distributions from ionization of achiral atomic and molecular speciesWe show that the combination of two achiral components - atomic or molecular target plus a circularly polarized photon - can yield chirally structured photoelectron angular distributions. For…Andreas Pier, Kilian Fehre, Sven Grundmann et al.·May 8, 2020SaveLearn
Lifetime of Magnetically Trapped Antihydrogen in ALPHAHow long antihydrogen atoms linger in the ALPHA magnetic trap is an important characteristic of the ALPHA apparatus. The initial trapping experiments in 2010 [1] were conducted with 38 detected…Andrea Capra·May 8, 2020SaveLearn
Detection of missing low-lying atomic states in actiniumTwo lowest-energy odd-parity atomic levels of actinium, 7s27p 2Po1/2, 7s27p 2Po3/2, were observed via two-step resonant laser-ionization spectroscopy and their respective energies were measured…Ke Zhang, Dominik Studer, Felix Weber et al.·May 7, 2020SaveLearn
Multiple photodetachment of atomic anions via single and double core-hole creationWe review the recent experimental and theoretical progress in K-shell detachment studies of atomic anions. On the experimental side, this field has largely benefitted from technical advances at 3rd…S. Schippers, A. Perry-Sassmannshausen, T. Buhr et al.·May 7, 2020SaveLearn
Photodetachment of the outer-most electrons in a few- and many-electron atomic systemsPhotodetachment of the outer-most electrons in few- and many-electron atomic systems is studied in the non-relativistic dipole approximation. Such a photodetachment is analyzed for the neutral atoms…Alexei M. Frolov·May 6, 2020SaveLearn
Rydberg level shift due to the electric field generated by Rydberg atom collision induced ionization in cesium atomic ensembleWe experimentally studied the Rydberg level shift caused by the electric field, which is generated by Rydberg atom collision induced ionization in a cesium atomic ensemble. The density of charged…Xin Wang, Jun He, Jiandong Bai et al.·May 6, 2020SaveLearn
Mass-selective removal of ions from Paul traps using parametric excitationWe study a method for mass-selective removal of ions from a Paul trap by parametric excitation. This can be achieved by applying an oscillating electric quadrupole field at twice the secular…Julian Schmidt, Daniel Hönig, Pascal Weckesser et al.·May 6, 2020SaveLearn
Lamb-peak spectrum of the HD (2-0) P(1) lineA saturation spectroscopy measurement of the P(1) line of the (2-0) band in HD is performed in a sensitive cavity-enhanced optical setup involving frequency comb calibration. The spectral signature…M. L. Diouf, F. M. J. Cozijn, K. -F. Lai et al.·May 6, 2020SaveLearn
Electron capture of Xe54+ in collisions with H2 molecules in the energy range between 5.5 MeV/u and 30.9 MeV/uThe electron capture process was studied for Xe54+ colliding with H2 molecules at the internal gas target of the ESR storage ring at GSI, Darmstadt. Cross section values for electron capture…F. M. Kröger, G. Weber, M. O. Herdrich et al.·May 5, 2020SaveLearn
Observation of effects due to an atom's electric quadrupole polarizabilityThe response of matter to fields underlies the physical sciences, from particle physics to astrophysics, and from chemistry to biophysics. We observe an atom's response to an electric quadrupole…Gerard Higgins, Chi Zhang, Fabian Pokorny et al.·May 5, 2020SaveLearn
Surface plasmon enhanced fast electron emission from metallised fibre optic nanotipsPhysical mechanisms of electron emission from fibre optic nanotips, namely, tunnelling, multi-photon, and thermionic emission, either prevent fast switching or require intense laser fields.…Sam Keramati, Ali Passian, Vineet Khullar et al.·May 5, 2020SaveLearn