Sub-kelvin temperature management in ion traps for optical clocksThe uncertainty of the ac Stark shift due to thermal radiation represents a major contribution to the systematic uncertainty budget of state-of-the-art optical atomic clocks. In the case of optical…T. Nordmann, A. Didier, M. Doležal et al.·Aug 10, 2020SaveLearn
Two-dipole and three-dipole dispersion coefficients for interaction of alkaline-earth atoms with alkaline-earth atoms and alkaline-earth ionsApropos to the growing interest in the study of long-range interactions which for their applications in cold atom physics, we have performed theoretical calculation for the two-dipole C6 and…Neelam Shukla, Bindiya Arora, Lalita Sharma et al.·Aug 10, 2020SaveLearn
Vacuum polarization and finite nuclear size effects in the two-photon decay of hydrogen-like ionsThe total two-photon decay rate of hydrogen-like ions is studied using relativistic quantum electrodynamics. In particular, we analyse how finite nuclear size and QED vacuum polarization corrections…J. Sommerfeldt, R. A. Müller, A. V. Volotka et al.·Aug 10, 2020SaveLearn
All magnetic field values cancelling D1 line transitions of alkali metal atomsIn this work, π, σ+ and σ- transitions between magnetic sublevels of the D1 line of all alkali atoms are considered analytically. General block Hamiltonian matrices in presence…Artur Aleksanyan, Rodolphe Momier, Emil Gazazyan et al.·Aug 8, 2020SaveLearn
Reduction of laser intensity noise over 1 MHz band for single atom trappingWe reduce the intensity noise of laser light by using an electro-optic modulator and a cousto-optic modulator in series. The electro-optic modulator reduces noise at high frequency(10 kHz to 1 MHz),…Yu Wang, Kenneth Wang, Eliot F. Fenton et al.·Aug 8, 2020SaveLearn
Nuclear fission in intense laser fieldsRapid-advancing intense laser technologies enable the possibility of a direct laser-nucleus coupling. In this paper the effect of intense laser fields on a series of nuclear fission processes,…Jintao Qi, Libin Fu, Xu Wang·Aug 8, 2020SaveLearn
Universality of the dynamic characteristic relationship of electron correlation in the two-photon double ionization process of a helium-like systemUniversality of the dynamic characteristic relationship between the characteristic time tc and the two-electron Coulomb interaction energy V12 of the ground state in the two-photon…Fei Li, Yu-Jun Yang, Jing Chen et al.·Aug 8, 2020SaveLearn
Polyatomic Molecules as Quantum Sensors for Fundamental PhysicsPrecision measurements in molecules have advanced rapidly in recent years through developments in techniques to cool, trap, and control. The complexity of molecules makes them a challenge to study,…Nicholas R. Hutzler·Aug 7, 2020SaveLearn
Electron impact single ionization of hydrogen molecule by twisted electron beamIn this communication, we present the results of the Five-fold Differential Cross Section (5DCS) and Triple Differential Cross Section (TDCS) for the (e,2e) process on molecular hydrogen (H2) by…Nikita Dhankhar, Rakesh Choubisa·Aug 7, 2020SaveLearn
Extended Calculations with Spectroscopic Accuracy: Energy Levels and Radiative Rates for O-like Ions between Ar XI and Cr XVIIUsing the multiconfiguration Dirac-Hartree-Fock and the relativistic configuration interaction methods, a consistent set of transition energies and radiative transition data for the main states of…C. X. Song, C. Y. Zhang, K. Wang et al.·Aug 7, 2020SaveLearn
Photo ionization of an atom passed through a diffraction gratingWe consider photo ionization of an atom which, due to passing through a diffraction grating, is prepared in a multi-site state possessing a periodic space structure with alternating maxima and…S. F. Zhang, B. Najjari, X. Ma et al.·Aug 6, 2020SaveLearn
Simultaneous two initial clock states preparation for thulium optical clockDue to the low sensitivity of the thulium optical clock to black-body radiation and good accuracy and stability estimations, it appears to be one of the most promising transportable optical clocks.…E. Fedorova, A. Golovizin, D. Tregubov et al.·Aug 5, 2020SaveLearn
Precisely Spun Super RotorsImproved optical control of molecular quantum states promises new applications including chemistry in the quantum regime, precision tests of fundamental physics, and quantum information processing.…Ivan O. Antonov, Patrick R. Stollenwerk, Sruthi Venkataramanababu et al.·Aug 5, 2020SaveLearn
Circumventing Detector Backaction on a Quantum CyclotronDetector backaction can be completely evaded when the state of a one-electron quantum cyclotron is detected, but it nonetheless significantly broadens the quantum-jump resonance lineshapes from which…Xing Fan, Gerald Gabrielse·Aug 5, 2020SaveLearn
Integrated optically pumped magnetometer for measurements within Earth's magnetic fieldWe present a portable optically pumped magnetometer instrument for ultra-sensitive measurements within the Earth's magnetic field. The central part of the system is a sensor head operating a…G. Oelsner, R. IJsselsteijn, T. Scholtes et al.·Aug 4, 2020SaveLearn
Nuclear magnetization distribution effect in molecules: Ra+ and RaF hyperfine structureRecently the first laser spectroscopy measurement of the radioactive RaF molecule has been reported by Ruiz et al. [Nature 581, 396 (2020)]. This and similar molecules are…Leonid V. Skripnikov·Aug 4, 2020SaveLearn
Entanglement via rotational blockade of MgF molecules in a magic potentialDiatomic polar molecules are one of the most promising platforms of quantum computing due to their rich internal states and large electric dipole moments. Here, we propose entangling rotational…Eunmi Chae·Aug 4, 2020SaveLearn
Relativistic configuration-interaction calculations of U I hyperfine constantsNeutral uranium (U I) is a very difficult atom for theoretical calculations due to a large number of valence electrons, six, strong valence-valence and valence-core correlations, high density of…Igor M. Savukov·Aug 4, 2020SaveLearn
A 40 W, 780 nm laser system with compensated dual beam splitters for atom interferometryWe demonstrate a narrow-linewidth 780 nm laser system with up to 40 W power and a frequency modulation bandwidth of 230 MHz. Efficient overlap on nonlinear optical elements combines two pairs of…Minjeong Kim, Remy Notermans, Chris Overstreet et al.·Aug 3, 2020SaveLearn
Influence of a quasi-molecular mechanism of recombination on the formation of hydrogen in the early universeIn the framework of a quasi-molecular approach, the formation of hydrogen atom in the pre-recombination period of evolution of the universe is analysed quantitatively. Calculations in an adiabatic…Tamaz Kereselidze, Irakli Noselidze, John F. Ogilvie·Aug 3, 2020SaveLearn
Mobility of the Singly-Charged Lanthanide and Actinide Cations: Trends and PerspectivesThe current status of gaseous transport studies of the singly-charged lanthanide and actinide ions is reviewed in light of potential applications to superheavy ions. The measurements and calculations…Giorgio Visentin, Mustapha Laatiaoui, Larry A. Viehland et al.·Aug 3, 2020SaveLearn
Enhanced observation time of magneto-optical traps using micro-machined non-evaporable getter pumpsWe show that micro-machined non-evaporable getter pumps (NEGs) can extend the time over which laser cooled atoms canbe produced in a magneto-optical trap (MOT), in the absence of other vacuum pumping…Rodolphe Boudot, James P. McGilligan, Kaitlin R. Moore et al.·Aug 3, 2020SaveLearn
Absolute frequency of 87Sr at 1.8 × 10-16 uncertainty by reference to remote Primary Frequency StandardsThe optical lattice clock NICT-Sr1 regularly reports calibration measurements of the international timescale TAI. By comparing measurement results to the reports of eight Primary Frequency Standards,…Nils Nemitz, Tadahiro Gotoh, Fumimaru Nakagawa et al.·Aug 3, 2020SaveLearn
Bright, continuous beams of cold free radicalsWe demonstrate a cryogenic buffer gas-cooled molecular beam source capable of producing bright, continuous beams of cold and slow free radicals via laser ablation over durations of up to 60~seconds.…J. C. Shaw, D. J. McCarron·Aug 2, 2020SaveLearn
Sensitive magnetometry in challenging environmentsState-of-the-art magnetic field measurements performed in shielded environments with carefully controlled conditions rarely reflect the realities of those applications envisioned in the introductions…Kai-Mei C. Fu, Geoffrey Z. Iwata, Arne Wickenbrock et al.·Jul 31, 2020SaveLearn