Fourier-transform VUV spectroscopy of 14,15N and 12,13CAccurate Fourier-transform spectroscopic absorption measurements of vacuum ultraviolet transitions in atomic nitrogen and carbon were performed at the Soleil synchrotron. For 14N transitions…K. -F. Lai, W. Ubachs, N. de Oliveira et al.·Sep 3, 2020SaveLearn
Ab initio calculations of energy levels in Be-like xenon: strong interference between electron-correlation and QED effectsThe strong mixing of close levels with two valence electrons in Be-like xenon greatly complicates ab initio QED calculations beyond the first-order approximation. Due to a strong interplay between…A. V. Malyshev, D. A. Glazov, Y. S. Kozhedub et al.·Sep 2, 2020SaveLearn
Precision measurement of the ionization energy of a single trapped 40Ca+ ion by Rydberg series excitationA complete set of spectroscopic data is indispensable when using Rydberg states of trapped ions for quantum information processing. We carried out Rydberg series spectroscopy for nS1/2 states…Justas Andrijauskas, Jonas Vogel, Arezoo Mokhberi et al.·Sep 2, 2020SaveLearn
Effect of molecular constitution and conformation on positron binding and annihilation in alkanesThe model-potential approach previously developed by the authors to study positron interactions with molecules is used to calculate the positron binding energy for n-alkanes (CnH2n+2) and…A. R. Swann, G. F. Gribakin·Sep 2, 2020SaveLearn
Continuous slowing of a gadolinium atomic beamThe article presents the development of a new and innovative experimental method to fully characterize a solenoidal "spin-flip" Zeeman slower (ZS) using a Quartz Crystal μ-balance (QCM) as a…A. Chavarría-Sibaja, A. Araya-Olmedo, O. A. Herrera-Sancho·Sep 2, 2020SaveLearn
Methods for measuring the electron EDM using ultracold YbF moleculesMeasurements of the electron's electric dipole moment (eEDM) are demanding tests of physics beyond the Standard Model. We describe how ultracold YbF molecules could be used to improve the precision…N. J. Fitch, J. Lim, E. A. Hinds et al.·Sep 1, 2020SaveLearn
Multielectron effects in strong-field ionization of oriented OCSWe present theoretical calculations of orientation-dependent total ionization yields from the highest occupied molecular orbitals of the oriented OCS molecule by solving the time-dependent…Mahmoud Abu-samha, Lars Bojer Madsen·Sep 1, 2020SaveLearn
Pair Correlations and Photoassociation Dynamics of Two Atoms in an Optical TweezerWe investigate the photoassociation dynamics of exactly two laser-cooled 85Rb atoms in an optical tweezer and reveal fundamentally different behavior to photoassociation in many-atom ensembles.…M. Weyland, S. S. Szigeti, R. A. B. Hobbs et al.·Aug 31, 2020SaveLearn
Helium-like ions in magnetic field: application of the nonperturbative relativistic method for axially symmetric systemsDirac equation for an electron bound by a nucleus in the presence of external axially symmetric field can be solved numerically by using the dual-kinetic-balance conditions imposed on the finite…A. M. Volchkova, V. A. Agababaev, D. A. Glazov et al.·Aug 31, 2020SaveLearn
Phonon-mediated spin-spin interactions between trapped Rydberg atomsWe theoretically investigate the possibility of creating phonon-mediated spin-spin interactions between neutral atoms trapped in optical tweezers. By laser coupling the atoms to Rydberg states,…Rasmus Vestergaard Skannrup, R. Gerritsma, S. J. J. M. F. Kokkelmans·Aug 31, 2020SaveLearn
An all-optical intrinsic atomic gradiometer with sub-20 fT/cm/ Hz sensitivity in a 22 μT earth-scale magnetic fieldIn this work we demonstrate a high sensitivity atomic gradiometer capable of operation in earth-field level environments. We apply a light-pulse sequence at four times the Larmor frequency to achieve…A. R. Perry, M. D. Bulatowicz, M. Larsen et al.·Aug 30, 2020SaveLearn
Direct measurement of the 7s\ 2S1/2→ 7p\ 2P3/2 transition frequency in 226Ra+We report a direct measurement of the 7s\ 2S1/2→ 7p\ 2P3/2 electric dipole transition frequency in 226Ra+. With a single laser-cooled radium ion we determine the…C. A. Holliman, M. Fan, A. Contractor et al.·Aug 30, 2020SaveLearn
Ion-pair dissociation dynamics in electron collision with carbon dioxide probed by velocity slice imagingIon-pair dissociation (IPD) to gas phase carbon dioxide molecule has been studied using time of flight (TOF) based mass spectroscopy in combination with the highly differential velocity slice imaging…Narayan Kundu, Sumit Naskar, Irina Jana et al.·Aug 30, 2020SaveLearn
Nonlinear optical effects in a nucleusIntense laser technologies generate light with unprecedented and growing intensities. The possibility emerges that a nucleus responds nonlinearly to an intense light field, pointing to a yet little…Tao Li, Xu Wang·Aug 29, 2020SaveLearn
Discrete Variable Representation method in the study of few-body quantum systems with non-zero angular momentumThe systems with small binding energies and widely distributed in space bound-state wave functions are considered. Because the interaction potential is weak and rather localized compared to the…V. A. Timoshenko, E. A. Yarevsky·Aug 29, 2020SaveLearn
Trapping, cooling, and photodissociation analysis of state-selected H\2+ ions produced by (3+1) multiphoton ionizationWe report on the production of cold, state-selected H2+ molecular ions in a linear RF trap. The ions are produced by (3+1) resonance-enhanced multi-photon ionisation (REMPI) of H2, and…Julian Schmidt, Thomas Louvradoux, Johannes Heinrich et al.·Aug 26, 2020SaveLearn
Optical-lattice based Cs active clock with continual superradiant lasing signalWe demonstrate state-of-the-art technique of an active clock to provide a continuous superradiant lasing signal using an ensemble of trapped Cs atoms in the optical lattice. A magic wavelength of the…Duo Pan, Bindiya Arora, Yan-mei Yu et al.·Aug 26, 2020SaveLearn
Atomic, molecular and optical physics applications of longitudinally coherent and narrow bandwidth Free-Electron LasersShort wavelength Free-Electron Lasers (FELs) are the newest light sources available to scientists to probe a wide range of phenomena, with chemical, physical and biological applications, using soft…Carlo Callegari, Alexei N. Grum-Grzhimailo, Kenichi L. Ishikawa et al.·Aug 25, 2020SaveLearn
Computational insight into diatomic molecules as probes to measure the variation of the proton-to-electron mass ratioAstrophysical molecular spectroscopy is an important means of searching for new physics through probing the variation of the proton-to-electron mass ratio, μ. New molecular probes could provide…Anna-Maree Syme, Laura K. McKemmish·Aug 25, 2020SaveLearn
Multiphoton interaction phase shifts in attosecond scienceAb initio simulations of a range of interferometric experiments are used to identify a strong dependence on multiphoton phase shifts in above-threshold ionization. A simple rule of thumb for…Mattias Bertolino, Jan Marcus Dahlström·Aug 24, 2020SaveLearn
Precision measurement of the 3D1 and 3D2 quadrupole moments in Lu+Precision measurements of the Lu+ 3D1 and 3D2 quadrupole moments have been carried out giving (3D1)=0.63862(74)\,e a02 and (3D2)=0.8602(14)\,e a02, respectively.…R. Kaewuam, T. R. Tan, Zhiqiang Zhang et al.·Aug 24, 2020SaveLearn
Investigation on the Cs 6S1=2 to 7D electric quadrupole transition via monochromatic two-photon process at 767 nmWe experimentally demonstrate the cesium electric quadrupole transition from the 6S1/2 ground state to the 7D3/2,5/2 excited state through a virtual level by using a single laser at 767 nm. The…Sandan Wang, Jinpeng Yuan, Lirong Wang et al.·Aug 22, 2020SaveLearn
Disentangling the Sub-Cycle Electron Momentum Spectrum in Strong-Field IonizationQuantum calculations of tunneling in strong-field ionization (SFI) predict intricate momentum distributions due to sub-laser-cycle attosecond electron dynamics. These are obscured in most experiments…Nicholas Werby, Adi Natan, Ruaridh Forbes et al.·Aug 21, 2020SaveLearn
Theoretical investigation of the Freeman resonance in the dissociative ionization of H2+The dissociative ionization of H2+ in linearly polarized, 400 nm laser pulses is simulated by solving a three-particle time-dependent Schr\"odinger equation in full dimensionality. The joint…Jinzhen Zhu·Aug 21, 2020SaveLearn
Relativistic electron-impact ionization of hydrogen atom from its metastable 2S-state in the symmetric/asymmetric coplanar geometriesWe analytically compute, in the first Born approximation for symmetric and asymmetric coplanar geometries, the triple differential cross sections for electron-impact ionization of hydrogen atom in…M. Jakha, S. Mouslih, S. Taj et al.·Aug 20, 2020SaveLearn