Temperature-dependent rotationally inelastic collisions of OH- and HeWe have studied the fundamental rotational relaxation and excitation collision of OH- J=0 <-> 1 with helium at different collision energies. Using state-selected photodetachment in a cryogenic ion…Eric S. Endres, Steve Ndengue, Olga Lakhmanskaya et al.·Oct 20, 2020SaveLearn
Photoelectron Angular Distributions of Nonresonant Two-Photon Atomic Ionization Near Nonlinear Cooper MinimaPhotoelectron angular distributions of the two-photon ionization of neutral atoms are theoretically investigated. Numerical calculations of two-photon ionization cross sections and asymmetry…J. Hofbrucker, L. Eiri, A. V. Volotka et al.·Oct 20, 2020SaveLearn
Enhanced polarization transfer to the characteristic Lα x-ray lines near the nonlinear Cooper minimum of two-photon ionizationIt has been shown that for nonlinear atomic ionization, transfer of the degree of circular polarization from incident to fluorescence light is maximum at the Cooper minimum (see Phys. Rev. A…J. Hofbrucker, A. V. Volotka, J. Szlachetko et al.·Oct 20, 2020SaveLearn
Improved Frequency Ratio Measurement with 87Sr and 171Yb Optical Lattice Clocks at NMIJWe report improved frequency ratio measurement with 87Sr and 171Yb optical lattice clocks at the National Metrology Institute of Japan (NMIJ). The 87Sr optical lattice clock is…Yusuke Hisai, Daisuke Akamatsu, Takumi Kobayashi et al.·Oct 20, 2020SaveLearn
Hollow Bessel beams for guiding atoms between vacuum chambers: A proposal and efficiency studyWe explore a scheme for guiding cold atoms through a hollow Bessel beam generated by a single axicon and a lens from a 2D magneto-optical trap toward a science chamber. We compare the Bessel beam…Dalila Rivero, Vinicius S. de Angelis, Camila Beli et al.·Oct 19, 2020SaveLearn
Analog de Sitter space in a controlled Coulomb explosionThe Coulomb explosion of an atomic gas steered by laser-controlled time-dependent charging can be modeled by a macroscopic system of identical charges whose number is not conserved. We show that such…Eugene B. Kolomeisky·Oct 19, 2020SaveLearn
Edge-state-induced correlation effects in two-color high-harmonic generationWe show that two-color high-harmonic spectroscopy can reveal finite-size and edge-state-induced dynamic electron correlation effects in a generic nanostructured band-gap material. Compared to the…Simon Vendelbo Bylling Jensen, Hossein Iravani, Lars Bojer Madsen·Oct 19, 2020SaveLearn
Rayleigh scattering of a linearly polarized light: scenario of the complete experimentThe process of the elastic scattering of photons on atoms, known as the Rayleigh scattering, is investigated. Expressing the scattering observables in terms of the electric and magnetic complex…A. V. Volotka, A. Surzhykov, S. Fritzsche·Oct 19, 2020SaveLearn
Photoassociation spectroscopy of weakly bound 87Rb2 molecules near 5P1/2 +5S1/2 threshold by optical Bragg scattering in Bose-Einstein condensatesWe report the high resolution photoassociation (PA) spectroscopy of a 87Rb Bose-Einstein condensate (BEC) to excited molecular states near the dissociation limit of 5P1/2 +5S1/2 by…Khan Sadiq Nawaz, Liangchao Chen, Chengdong Mi et al.·Oct 18, 2020SaveLearn
Observation of resonant dipolar collisions in ultracold 23Na87Rb rotational mixturesWe report the investigation on dipolar collisions in rotational state mixtures of ultracold bosonic 23Na87Rb molecules. The large resonant dipole-dipole interaction between molecules in…Junyu He, Xin Ye, Junyu Lin et al.·Oct 17, 2020SaveLearn
Manipulating Twisted Electrons in Strong-Field IonizationWe investigate the discrete orbital angular momentum (OAM) of photoelectrons freed in strongfield ionization. We use these `twisted' electrons to provide an alternative interpretation on existing…A. S. Maxwell, G. S. J. Armstrong, M. F. Ciappina et al.·Oct 16, 2020SaveLearn
Zeptosecond Birth Time Delay in Molecular PhotoionizationPhotoionization is one of the fundamental light-matter interaction processes in which the absorption of a photon launches the escape of an electron. The time scale of the process poses many open…Sven Grundmann, Daniel Trabert, Kilian Fehre et al.·Oct 16, 2020SaveLearn
Raman Sideband Cooling in Optical Tweezer Arrays for Rydberg DressingSingle neutral atoms trapped in optical tweezers and laser-coupled to Rydberg states provide a fast and flexible platform to generate configurable atomic arrays for quantum simulation. The platform…Nikolaus Lorenz, Lorenzo Festa, Lea-Marina Steinert et al.·Oct 15, 2020SaveLearn
Non-dipole effects in time delay of photoelectrons from atoms, negative ions, and endohedralsIn this Letter, we investigate the non-dipole effects in time delay of photoelectrons emitted by multi-electron atoms, negative ions, and respective endohedrals. We present the necessary general…M. Ya. Amusia, L. V. Chernysheva·Oct 15, 2020SaveLearn
Improved limits for violations of local position invariance from atomic clock comparisonsWe compare two optical clocks based on the 2S1/2(F=0) 2D3/2(F=2) electric quadrupole (E2) and the 2S1/2(F=0) 2F7/2(F=3) electric octupole (E3) transition of…R. Lange, N. Huntemann, J. M. Rahm et al.·Oct 13, 2020SaveLearn
Circular dichroism in atomic vapors: magnetically induced transitions responsible for two distinct behaviorsAtomic transitions of alkali metals for which the condition Fe-Fg = 2 is satisfied have null probability in a zero magnetic field, while a giant increase can occur when an external field is…Armen Sargsyan, Arevik Amiryan, Ara Tonoyan et al.·Oct 13, 2020SaveLearn
Empirical relationships for heavy-ion equilibrated charges and charge-changing cross-sections in rarefied hydrogen and their applicationHighly ionized heavy evaporation residues (ERs) resulting from heavy ion (HI) fusion-evaporation reactions are knocked out from solid targets to rarefied gas of gas-filled recoil separators. In gas,…Roman Sagaidak·Oct 13, 2020SaveLearn
Characterizing multielectron dynamics during recollisionMeasuring the delay for an electron to emerge from different states is one of the major achievements of attosecond science. This delay can have two origins - the electron wave packet is reshaped…Graham G. Brown, Dong Hyuk Ko, Chunmei Zhang et al.·Oct 13, 2020SaveLearn
Perspectives for analyzing non-linear photo ionization spectra with deep neural networks trained with synthetic Hamilton matricesWe have constructed deep neural networks, which can map fluctuating photo-electron spectra obtained from noisy pulses to spectra from noise-free pulses. The network is trained on spectra from noisy…Sajal Kumar Giri, Lazaro Alonso, Ulf Saalmann et al.·Oct 12, 2020SaveLearn
Implementation and validation of the relativistic transient absorption theory within the dipole approximationA relativistic transient absorption theory is derived, implemented and validated within the dipole approximation based on the time-dependent Dirac equation. Time-dependent simulations have been…Felipe Zapata, Jimmy Vinbladh, Eva Lindroth et al.·Oct 12, 2020SaveLearn
K-shell ionization and characteristic x-ray radiation by high-energy electrons in multifoil targetsProcesses of K-shell ionization and accompanying characteristic x-ray radiation (CXR) by high-energy electrons moving through a multifoil copper target are considered. Expressions describing the main…S. V. Trofymenko·Oct 11, 2020SaveLearn
Near-field imaging of dipole emission modulated by an optical gratingMultiphoton-ionized electrons are born into a strong light field that will determine their short-term future. By controlling the infrared beam, we enable atoms or molecules to generate extreme…Dong Hyuk Ko, Graham G. Brown, Chunmei Zhang et al.·Oct 10, 2020SaveLearn
Characterizing Fano Resonances During RecollisionWhen intense light irradiates a quantum system, an ionizing electron recollides with its parent ion within the same light cycle and, during that very brief (few femtosecond) encounter, its kinetic…Graham G. Brown, Dong Hyuk Ko, Chunmei Zhang et al.·Oct 9, 2020SaveLearn
Magnetic Induction Imaging with a cold-atom radio-frequency magnetometerThe sensitive detection of either static or radio-frequency (rf) magnetic fields is essential to many fundamental studies and applications. Here, we demonstrate the operation of a…Alessandro Fregosi, Carlo Gabbanini, Silvia Gozzini et al.·Oct 9, 2020SaveLearn
Franck-Condon tuning of optical cycling centers by organic functionalizationLaser induced electronic excitations that spontaneously emit photons and decay directly to the initial ground state ("optical cycling transitions") are used in quantum information and precision…Claire E. Dickerson, Han Guo, Ashley J. Shin et al.·Oct 8, 2020SaveLearn