Detection of NaRb Feshbach molecule by photodissociationWe demonstrate detection of NaRb Feshbach molecules at high magnetic field by combining molecular photodissociation and absorption imaging of the photofragments. The photodissociation process is…Fan Jia, Zhichao Guo, Lintao Li et al.·Oct 8, 2020SaveLearn
A scanning quantum cryogenic atom microscope at 6 KThe Scanning Quantum Cryogenic Atom Microscope (SQCRAMscope) is a quantum sensor in which a quasi-1D quantum gas images electromagnetic fields emitted from a nearby sample. We report improvements to…Stephen F. Taylor, Fan Yang, Brandon A. Freudenstein et al.·Oct 7, 2020SaveLearn
Predicting quasibound states of negative ionsWe demonstrated the accurate prediction of a quasibound spectrum of a negative ion using a novel high-precision theoretical approach. We used La- as a test case due to a recent experiment that…M. S. Safronova, C. Cheung, M. G. Kozlov et al.·Oct 6, 2020SaveLearn
Microscopic electronic structure tomography of Rydberg macrodimersPrecise control and study of molecules is challenging due to the variety of internal degrees of freedom and local coordinates that are typically not controlled in an experiment. Employing quantum gas…Simon Hollerith, Jun Rui, Antonio Rubio-Abadal et al.·Oct 5, 2020SaveLearn
Absolute fraction of emitted Ps determined by GEANT4 supported analysis of gamma spectraThe fraction of positronium (Ps) emitted from a surface of a germanium single crystal at high temperature is usually assumed to approach unity at zero positron implantation energy. In the experiment,…Benjamin Rienäcker, Thomas Gigl, Giancarlo Nebbia et al.·Oct 5, 2020SaveLearn
Robust laboratory limits on a cosmological spatial gradient in the electromagnetic fine-structure constant from accelerometer experimentsQuasar absorption spectral data indicate the presence of a spatial gradient in the electromagnetic fine-structure constant α on cosmological length scales. We point out that experiments with…Yevgeny V. Stadnik·Oct 5, 2020SaveLearn
CeNTREX: A new search for time-reversal symmetry violation in the 205Tl nucleusThe Cold molecule Nuclear Time-Reversal EXperiment (CeNTREX) is a new effort aiming for a significant increase in sensitivity over the best present upper bounds on the strength of hadronic time…Olivier Grasdijk, Oskari Timgren, Jakob Kastelic et al.·Oct 4, 2020SaveLearn
Photodetachment Spectroscopy of Quasibound States of the Negative Ion of LanthanumThe negative ion of lanthanum, La-, has one of the richest bound state spectra observed for an atomic negative ion and has been proposed as a promising candidate for laser-cooling applications. In…C. W. Walter, N. D. Gibson, N. B. Lyman et al.·Oct 2, 2020SaveLearn
Determining a vibrational distribution with a broadband optical sourceThis work presents an experimental protocol conceived to determine the vibrational distribution of barium monofluoride molecules seeded in a supersonic beam of argon. Here, as in many cases, the…T. Courageux, A. Cournol, D. Comparat et al.·Oct 2, 2020SaveLearn
Near L-Edge Single and Multiple Photoionization of Doubly Charged Iron IonsUsing the photon-ion merged-beams technique at a synchrotron light source, we have measured relative cross sections for single and up to five-fold photoionization of Fe2+ ions in the energy…Stefan Schippers, Randolf Beerwerth, Sadia Bari et al.·Oct 1, 2020SaveLearn
Direct Observation of Ion Micromotion in a Linear Paul TrapIn this paper, direct observation of micromotion for multiple ions in a laser-cooled trapped ion crystal is discussed along with a novel measurement technique for micromotion amplitude. Micromotion…Liudmila A. Zhukas, Maverick J. Millican, Peter Svihra et al.·Oct 1, 2020SaveLearn
The molecule H2 in a strong magnetic field revisitedA compact, few-parametric, physically adequate, 3-term variational trial function is used to calculate with high accuracy the energy of the ground state 3u of the hydrogen molecule $…D. J. Nader, A. V. Turbiner, J. C. López Vieyra·Sep 30, 2020SaveLearn
Aspects of arbitrarily oriented dipoles scattering in plane: short-range interaction influenceThe impact of the short-range interaction on the resonances occurrence in the anisotropic dipolar scattering in a plane was numerically investigated for the arbitrarily oriented dipoles and for a…Eugene A. Koval, Oksana A. Koval·Sep 30, 2020SaveLearn
Waveguide-coupled Rydberg spectrum analyzer from 0 to 20 GHzWe demonstrate an atomic radio-frequency (RF) receiver and spectrum analyzer based on thermal Rydberg atoms coupled to a planar microwave waveguide. We use an off-resonant RF heterodyne technique to…David H. Meyer, Paul D. Kunz, Kevin C. Cox·Sep 30, 2020SaveLearn
Radiative Transition Properties of Singly Charged Magnesium, Calcium, Strontium and Barium IonsAccurate values of electric dipole (E1) amplitudes along with their uncertainties for a number of transitions among low-lying states of Mg+, Ca+, Sr+, and Ba+ are listed by carrying out…Mandeep Kaur, Danish Furekh Dar, B. K. Sahoo et al.·Sep 29, 2020SaveLearn
Measuring ion oscillations at the quantum level with fluorescence lightWe demonstrate an optical method for detecting the mechanical oscillations of an atom with single-phonon sensitivity. The measurement signal results from the interference between the light scattered…G. Cerchiari, G. Araneda, L. Podhora et al.·Sep 29, 2020SaveLearn
The 229Th isomer: prospects for a nuclear optical clockThe proposal for the development of a nuclear optical clock has triggered a multitude of experimental and theoretical studies. In particular the prediction of an unprecedented systematic frequency…Lars von der Wense, Benedict Seiferle·Sep 28, 2020SaveLearn
Femtotesla direct magnetic gradiometer using a single multipass cellWe describe a direct gradiometer using optical pumping with opposite circular polarization in two 87Rb atomic ensembles within a single multipass cell. A far-detuned probe laser undergoes a…V. G. Lucivero, W. Lee, N. Dural et al.·Sep 28, 2020SaveLearn
Radiative rates and opacity calculations in Ce II-IV Multiconfiguration Dirac-Hartree-Fock radiative parameters for emission lines in Ce II-IV ions and cerium opacity calculations for kilonovaeLarge-scale calculations of atomic structures and radiative properties have been carried out for singly, doubly- and trebly ionized cerium. For this purpose, the purely relativistic…H. Carvajal Gallego, P. Palmeri, P. Quinet·Sep 28, 2020SaveLearn
Observation of Blackbody Radiation Enhanced Superradiance in ultracold Rydberg GasesAn ensemble of excited atoms can synchronize emission of light collectively in a process known as superradiance when its characteristic size is smaller than the wavelength of emitted photons. The…Liping Hao, Zhengyang Bai, Jingxu Bai et al.·Sep 27, 2020SaveLearn
Electric quadrupole shifts of the precession frequencies of 131Xe atoms in rectangular cellsWe study an atomic comagnetometer design based on the spin precessions of 129Xe and 131Xe atoms in glass cells. The quadrupole splittings in the precession spectrum of 131Xe are fully…Yu-Kun Feng, Shao-Bo Zhang, Zheng-Tian Lu et al.·Sep 25, 2020SaveLearn
Magnetic sensing at zero field with a single nitrogen-vacancy centerSingle nitrogen-vacancy (NV) centers are widely used as nanoscale sensors for magnetic and electric fields, strain and temperature. Nanoscale magnetometry using NV centers allows for example to…Till Lenz, Arne Wickenbrock, Fedor Jelezko et al.·Sep 25, 2020SaveLearn
Proton size from precision experiments on hydrogen and muonic hydrogen atomsThe "proton radius puzzle" was recently solved by reducing the four-standard deviation discrepancy between the results for electronic hydrogen (H) and muonic hydrogen (μ H) atoms to 3.3…D. Solovyev, T. Zalialiutdinov, A. Anikin·Sep 24, 2020SaveLearn
Orientation and Alignment Dynamics of Polar Molecule Driven by Shaped Laser PulsesWe review on the theoretical status of intense laser orientation and alignment. The evolution of the rotational wave packet and its dynamics leading to orientation and alignment is the topic of the…Vijit V. Nautiyal, Sumana Devi, Ashish Tyagi et al.·Sep 23, 2020SaveLearn
Vertex-type thermal correction to the one-photon transition ratesThermal corrections to the one-photon spontaneous and induced transition probabilities for hydrogen and hydrogen-like ions are evaluated. The found thermal corrections are given by the vertex Feynman…D. Solovyev, T. Zalialiutdinov, A. Anikin·Sep 21, 2020SaveLearn