Artificial neural network as an effective tool to calculate parameters of positron annihilation lifetime spectraThe paper presents the application of the multi-layer perceptron regressor model for predicting the parameters of positron annihilation lifetime spectra using the example of alkanes in the solid…M. Pietrow, A. Miaskowski·Jan 4, 2023SaveLearn
Observation of anisotropic superfluid density in an artificial crystalWe experimentally and theoretically investigate the anisotropic speed of sound of an atomic superfluid (SF) Bose-Einstein condensate in a 1D optical lattice. Because the speed of sound derives from…Junheng Tao, Mingshu Zhao, Ian Spielman·Jan 3, 2023SaveLearn
Measuring nonlocal three-body spatial correlations with Rydberg trimers in ultracold quantum gasesWe measure nonlocal third-order spatial correlations in non-degenerate ultracold gases of bosonic (84Sr) and spin-polarized fermionic (87Sr) strontium through studies of the formation rates…S. K. Kanungo, Y. Lu, F. B. Dunning et al.·Jan 2, 2023SaveLearn
Response time of electron inside a molecule to light in strong-field ionizationWe study ionization of aligned H2+ in strong elliptically-polarized laser fields numerically and analytically. The calculated offset angle in photoelectron momentum distribution is several…J. Y. Che, Y. G. Peng, F. B. Zhang et al.·Jan 2, 2023SaveLearn
Theoretical investigation of orbital alignment of x-ray-ionized atoms in exotic electronic configurationsWe theoretically study orbital alignment in x-ray-ionized atoms and ions, based on improved electronic-structure calculations starting from the Hartree-Fock-Slater model. We employ first-order…Laura Budewig, Sang-Kil Son, Robin Santra·Dec 31, 2022SaveLearn
Measuring autoionization decay lifetimes of optically forbidden inner valence excited states in neon atoms with attosecond noncollinear four wave mixing spectroscopyAttosecond noncollinear four wave mixing spectroscopy with one attosecond extreme ultraviolet (XUV) pulse and two few-cycle near-infrared (NIR) pulses was used to measure the autoionization decay…Nicolette G. Puskar, Yen-Cheng Lin, James D. Gaynor et al.·Dec 29, 2022SaveLearn
Absolute frequency measurement of a Yb optical clock at the limit of the Cs fountainWe present the new absolute frequency measurement of ytterbium (171Yb) obtained at INRiM with the optical lattice clock IT-Yb1 against the cryogenic caesium (133Cs) fountain IT-CsF2, evaluated…Irene Goti, Stefano Condio, Cecilia Clivati et al.·Dec 29, 2022SaveLearn
Crystal Nucleation and Growth in Liquids: Cooperative Atom Attachment and DetachmentClassical theories of crystal nucleation and growth from the liquid assume activated processes that are interface limited, with the atoms individually joining the growing interface by jumps that…Fangzheng Chen, Zohar Nussinov, K. F. Kelton·Dec 28, 2022SaveLearn
Comprehensive theory of the Lamb shift in light muonic atomsA comprehensive theory of the Lamb shift in light muonic atoms such as μH, μD, μ3He+, and μ4He+ is presented, with all quantum electrodynamic corrections included at the…K. Pachucki, V. Lensky, F. Hagelstein et al.·Dec 28, 2022SaveLearn
Two-color polarization control on angularly resolved attosecond time delaysMeasured photoionization time delays may exhibit large variations as a function of the emission angles, even for spherically symmetric targets, as shown in recent RABBITT (reconstruction of…D. I. R. Boll, L. Martini, A. Palacios et al.·Dec 27, 2022SaveLearn
Rigorous negative-ion binding energies in low-energy electron elastic collisions with heavy multi-electron atoms and fullerene molecules: validation of electron affinitiesDramatically sharp resonances manifesting stable negative-ion formation characterize Regge pole-calculated low-energy electron elastic total cross sections (TCSs) of heavy multi-electron systems. The…Alfred Z. Msezane, Zineb Felfli·Dec 26, 2022SaveLearn
Doppler sensitivity and optimization of Rydberg atom-based antennasRadio frequency antennas based on Rydberg atoms can in principle reach sensitivities beyond those of any conventional wire antenna, especially at lower frequencies where very long wires are needed to…Peter B. Weichman·Dec 26, 2022SaveLearn
In-beam hyperfine spectroscopy of antihydrogen, hydrogen and deuteriumThe ASACUSA collaboration is developing a polarized beam of antihydrogen atoms to precisely determine the ground-state hyperfine structure for studies of CPT and Lorentz invariance. Using a beam of…E. Widmann·Dec 26, 2022SaveLearn
Foldy-Wouthuysen Transformation in Strong Magnetic Fields and Relativistic Corrections for Quantum Cyclotron Energy LevelsWe carry out a direct, iterative Foldy--Wouthuysen transformation of a general Dirac Hamiltonian coupled to an electromagnetic field, including the anomalous magnetic moment. The transformation is…A. Wienczek, C. Moore, U. D. Jentschura·Dec 25, 2022SaveLearn
Thermal contribution to measured g-factors in alkali-like atomsIn this paper, we consider a one-loop thermal correction to the g-factors of the ground and low-lying excited states in neutral alkaline-like atomic systems. As an example, we carried out…T. Zalialiutdinov, Y. Kozhedub, D. Solovyev·Dec 23, 2022SaveLearn
Atom Interferometry with the Rb Blue TransitionsWe demonstrate a novel scheme for Raman-pulse and Bragg-pulse atom interferometry based on the 5S - 6P blue transitions of 87Rb that provides an increase by a factor 2…L. Salvi, G. M. Tino, L. Cacciapuoti et al.·Dec 23, 2022SaveLearn
State-resolved ionization dynamics of neon atom induced by x-ray free-electron-laser pulsesWe present a theoretical framework to describe state-resolved ionization dynamics of neon atoms driven by ultraintense x-ray free-electron-laser pulses. In general, x-ray multiphoton ionization…Laura Budewig, Sang-Kil Son, Robin Santra·Dec 23, 2022SaveLearn
Laser Cooling of Trapped Ions in Strongly Inhomogeneous Magnetic FieldsHybrid traps for the simultaneous confinement of neutrals and ions have recently emerged as versatile tools for studying interactions between these species at very low temperatures. Such traps rely…Richard Karl, Yanning Yin, Stefan Willitsch·Dec 22, 2022SaveLearn
A new bound on the electron's electric dipole momentThe Standard Model cannot explain the dominance of matter over anti-matter in our universe. This imbalance indicates undiscovered physics that violates combined CP symmetry. Many extensions to the…Tanya S. Roussy, Luke Caldwell, Trevor Wright et al.·Dec 22, 2022SaveLearn
Systematic and statistical uncertainty evaluation of the HfF+ electron electric dipole moment experimentWe have completed a new precision measurement of the electron's electric dipole moment using trapped HfF+ in rotating bias fields. We report on the accuracy evaluation of this measurement,…Luke Caldwell, Tanya S. Roussy, Trevor Wright et al.·Dec 22, 2022SaveLearn
Extraction of spin-averaged rovibrational transition frequencies in HD+ for the determination of fundamental constantsWe present a comprehensive analysis of all currently available high-accuracy frequency measurements of rotational and rovibrational transitions in the hydrogen molecular ion HD+. Our analysis…Jean-Philippe Karr, Jeroen C. J. Koelemeij·Dec 22, 2022SaveLearn
QED radiative corrections to electric dipole amplitudes in heavy atomsWe use the radiative potential method to perform a detailed study of quantum electrodynamics (QED) radiative corrections to electric dipole (E1) transition amplitudes in heavy alkali-metal atoms Rb,…C. J. Fairhall, B. M. Roberts, J. S. M. Ginges·Dec 22, 2022SaveLearn
Relativistic calculations of molecular electric dipole moments of singly charged aluminium monohalidesIn this work, we have studied the permanent electric dipole moments of singly charged aluminium monohalides in their electronic ground state, X2, using Kramers-restricted relativistic…R. Bala, V. S. Prasannaa, B. P. Das·Dec 21, 2022SaveLearn
Experimental and theoretical study of dynamic polarizabilities in the 5S1/2-5D5/2 clock transition in rubidium-87 and determination of E1 matrix elementsThe interaction between light and an atom causes perturbations in the atom's energy levels, known as the light-shift. These light-shifts are a key source of inaccuracy in atomic clocks, and can also…Rhona Hamilton, Benjamin M. Roberts, Sarah K. Scholten et al.·Dec 21, 2022SaveLearn
High Harmonic Generation without Tunnel-IonizationA new High Harmonic Generation (HHG) scheme, which doesn't rely on Tunnel-Ionization as the ionization mechanism but rather on Single-Photon Ionization, is theoretically proposed and numerically…Jonathan Berkheim, Eliyahu Bordo, Eldar Ragonis et al.·Dec 20, 2022SaveLearn