Isotopic effects in molecular attosecond photoelectron interferometryIsotopic substitution in molecular systems can affect fundamental molecular properties including the energy position and spacing of electronic, vibrational and rotational levels, thus modifying the…Dominik Ertel, David Busto, Ioannis Makos et al.·Mar 2, 2023SaveLearn
Deflected Beam Method for Absolute Current Density DeterminationWe present a broadly applicable in situ method for profiling ion beams using electrostatic deflectors and a Faraday cup. By deconvolving the detector geometry from the resulting current profiles,…Richard H. Mattish, Timothy J. Burke, Patrick R. Johnson et al.·Mar 2, 2023SaveLearn
Absolute frequency measurements with a robust, transportable 40Ca+ optical clockWe constructed a transportable 40Ca+ optical clock (with an estimated minimum systematic shift uncertainty of 1.3*10(-17) and a stability of 5*10(-15)/sqrttau ) that can operate outside the…Huaqing Zhang, Yao Huang, Baolin Zhang et al.·Mar 2, 2023SaveLearn
Spectrum of Feshbach resonances in NaLi + Na collisionsCollisional resonances of molecules can offer a deeper understanding of interaction potentials and collision complexes, and allow control of chemical reactions. Here, we experimentally map out the…Juliana J. Park, Hyungmok Son, Yu-Kun Lu et al.·Mar 1, 2023SaveLearn
Carbon elastic and inelastic stopping-power components for heavy ions at Bohr and higher velocitiesCarbon stopping-power (SP) data for heavy ions (HIs), obtained around Bohr velocities, revealed remarkably lower values than those predicted by the SRIM/TRIM calculations/simulations. An attempt was…R. N. Sagaidak·Mar 1, 2023SaveLearn
Development and Evaluation of a Narrow Linewidth Laser System for 171Yb+ E2 TransitionWe report the construction and characterization of a narrow-linewidth laser system to interrogate the E2 clock transitions at 436 nm of ytterbium ions trapped in end-cap traps. The 871 nm seed laser…Yani Zuo, Shiying Cao, Shaoyang Dai et al.·Mar 1, 2023SaveLearn
Compact multi-channel radio frequency pulse sequence generator with fast switching capability for cold atom interferometersCold atom interferometers have matured to a powerful tool in fundamental physics research, and they are currently on their way from realizations in the laboratory to applications in the real world.…Min Jiang, Si-Bin Lu, Yang Li et al.·Mar 1, 2023SaveLearn
Self-Calibrated Atom-Interferometer Gyroscope by Modulating Atomic VelocitiesAtom-interferometer gyroscopes have attracted much attention for their potential superior long-term stability and extremely low drift. For such high precision instrument, a self-calibration to…Hong-Hui Chen, Zhan-Wei Yao, Ze-Xi Lu et al.·Mar 1, 2023SaveLearn
Tunable Feshbach resonances in collisions of ultracold molecules in 2 states with alkali-metal atomsWe consider the magnetically tunable Feshbach resonances that may exist in ultracold mixtures of molecules in 2 states and alkali-metal atoms. We focus on Rb+CaF as a prototype system. There…Robert C. Bird, Michael R. Tarbutt, Jeremy M. Hutson·Feb 28, 2023SaveLearn
Relativistic calculations of the energies of the low-lying 1sns, 1snp, 1snd states and the probabilities of the one-photon 1snl 1sn'l' transitions in heliumlike uraniumFor heliumlike uranium, the energies of the singly-excited 1sns, 1snp, and 1snd states with n≤ 4 and the probabilities of the one-photon 1s3d 1s2p, 1s3p 1s2s, 1s3p 1s2p and…N. K. Dulaev, M. Y. Kaygorodov, A. V. Malyshev et al.·Feb 28, 2023SaveLearn
Ultra-high vacuum pressure measurement using cold atomsIn this work, we have measured the background pressure in an ultra-high vacuum (UHV) chamber by measuring the collisional loss rates in a Rb atom magneto-optical trap (MOT) on an atom chip. The loss…S. Supakar, Vivek Singh, V. B. Tiwari et al.·Feb 28, 2023SaveLearn
All-order Coulomb corrections to Delbr\"uck scattering above the pair production thresholdWe report calculations of Delbr\"uck scattering that include all-order Coulomb corrections for photon energies above the threshold of electron-positron pair creation. Our approach is based on the…J. Sommerfeldt, V. A. Yerokhin, Th. Stöhlker et al.·Feb 27, 2023SaveLearn
Optimizing Population Accumulation in Quantum States Using Microwave SpectroscopyWe present an all-optical method for efficiently preparing cold atoms in a desired Zeeman state, either on the magnetically insensitive clock state (mF=0) or a particular state suitable for…Jia-You Liou, Chi-En Wu, Hsuan-Jui Su et al.·Feb 24, 2023SaveLearn
Fast Single-shot Imaging of Individual Ions via Homodyne Detection of Rydberg-Blockade-Induced AbsorptionWe introduce well-separated 87Rb+ ions into an atomic ensemble by microwave ionization of Rydberg excitations and realize single-shot imaging of the individual ions with an exposure time of 1…Jinjin Du, Thibault Vogt, Wenhui Li·Feb 24, 2023SaveLearn
Efficient Pathway to NaCs Ground State MoleculesWe present a study of two-photon pathways for the transfer of NaCs molecules to their rovibrational ground state. Starting from NaCs Feshbach molecules, we perform bound-bound excited state…Claire Warner, Niccolò Bigagli, Aden Z. Lam et al.·Feb 23, 2023SaveLearn
Accurate measurement of the loss rate of cold atoms due to background gas collisions for the quantum-based cold atom vacuum standardWe present measurements of thermalized collisional rate coefficients for ultra-cold 7Li and 87Rb colliding with room-temperature He, Ne, N2, Ar, Kr, and Xe. In our experiments, a combined…Daniel S. Barker, James A. Fedchak, Jacek Kłos et al.·Feb 23, 2023SaveLearn
Vibrationally Resolved Inner-Shell Photoexcitation of the Molecular Anion C2-Carbon 1s core-hole excitation of the molecular anion C2- has been experimentally studied at high resolution by employing the photon-ion merged-beams technique at a synchrotron light source.…S. Schippers, P. -M. Hillenbrand, A. Perry-Sassmannshausen et al.·Feb 23, 2023SaveLearn
Dark-state enhanced loading of an optical tweezer arrayNeutral atoms and molecules trapped in optical tweezers have become a prevalent resource for quantum simulation, computation, and metrology. However, the maximum achievable system sizes of such…Adam L. Shaw, Pascal Scholl, Ran Finklestein et al.·Feb 21, 2023SaveLearn
Direct Laser Cooling of Polyatomic MoleculesOver the past decade, tremendous progress has been made to extend the tools of laser cooling and trapping to molecules. Those same tools have recently been applied to polyatomic molecules (molecules…Benjamin L. Augenbraun, Loic Anderegg, Christian Hallas et al.·Feb 20, 2023SaveLearn
High resolution photoassociation spectroscopy of the excited c31+ potential of 23Na133CsWe report on photoassociation spectroscopy probing the c31+ potential of the bi-alkali NaCs molecule, identifying eleven vibrational lines between v' = 0 and v' = 25 of the excited…Lewis R. B. Picard, Jessie T. Zhang, William B. Cairncross et al.·Feb 17, 2023SaveLearn
Sub-Natural Linewidth Superradiant Lasing with Cold 88Sr AtomsSuperradiant lasers operate in the bad-cavity regime, where the phase coherence is stored in the spin state of an atomic medium rather than in the intracavity electric field. Such lasers use…Sofus Laguna Kristensen, Eliot Bohr, Julian Robinson-Tait et al.·Feb 17, 2023SaveLearn
Investigation of Efimov Features and Universality in 87Rb-40K Mixtures with finite-range interactionThe study of Efimov features and their relationships in 40K-87Rb Mixtures has generated extensive discussion, yet the discrepancy between Efimov universality predictions based on the…Ning-Ning Gao, Hui-Li Han, Ting-Yun Shi·Feb 17, 2023SaveLearn
Compact atom source using fiber-based pulsed laser ablationWe designed, demonstrated, and characterized an atom source based on fiber-based pulsed laser ablation. By using commercially available miniature lens system for focusing nanosecond pulsed laser of…Alto Osada, Ryuta Tamaki, Wenbo Lin et al.·Feb 15, 2023SaveLearn
1S-3S cw spectroscopy of hydrogen/deuterium atomWe study the 1S-3S two-photon transition of hydrogen in a thermal atomic beam, using a homemade cw laser source at 205 nm. The experimental method is described, leading in 2017 to the measurement of…Pauline Yzombard, Simon Thomas, Lucile Julien et al.·Feb 15, 2023SaveLearn
Formation of ultracold molecules by merging optical tweezersWe demonstrate the formation of a single RbCs molecule during the merging of two optical tweezers, one containing a single Rb atom and the other a single Cs atom. Both atoms are initially…Daniel K. Ruttley, Alexander Guttridge, Stefan Spence et al.·Feb 14, 2023SaveLearn