Principal frequency of an ultrashort laser pulseWe introduce an alternative definition of the main frequency of an ultrashort laser pulse, the principal frequency ωP. This parameter is complementary to the most accepted and widely used…Enrique G. Neyra, Pablo Vaveliuk, Emilio Pisanty et al.·Jan 26, 2021SaveLearn
Precision measurements of electric-field-induced frequency displacements of an ultranarrow optical transition in ions in a solidWe report a series of measurements of the effect of an electric field on the frequency of the ultranarrow linewidth 7F0 → 5D0 optical transition of Eu3+ ions in an $…S. Zhang, N. Lučić, N. Galland et al.·Jan 25, 2021SaveLearn
Partial Quantum Coherence, Ultrashort Electron Pulse Statistics, and a Plasmon-Enhanced Nanotip Emitter Based on Metallized Optical FibersThe present dissertation covers two related research projects. The first topic was initiated with the ultimate goal of observing quantum degeneracy in ultrashort free electron pulses. This…Sam Keramati·Jan 25, 2021SaveLearn
The hyperfine anomaly in heavy atoms and its role in precision atomic searches for new physicsWe report on our calculations of differential hyperfine anomalies in the nuclear single-particle model for a number of atoms and ions of interest for studies of fundamental symmetries violations.…B. M. Roberts, J. S. M. Ginges·Jan 25, 2021SaveLearn
Measurements and analysis of response function of cold atoms in optical molassesWe report our experimental measurements and theoretical analysis of the position response function of a cloud of cold atoms residing in the viscous medium of an optical molasses and confined by a…Subhajit Bhar, Maheswar Swar, Urbashi Satpathi et al.·Jan 22, 2021SaveLearn
Extended theoretical transition data in C I - IVAccurate atomic data are essential for opacity calculations and for abundance analyses of the Sun and other stars. The aim of this work is to provide accurate and extensive results of energy levels…W. Li, A. M. Amarsi, A. Papoulia et al.·Jan 22, 2021SaveLearn
Measurement of Absolute Single and Double Electron Capture Cross Sections for O6+ Ions Collision with CO2, CH4, H2 and N2The absolute electron capture cross sections for single and double charge exchanges between the highly charged ions O6+ and CO2, CH4, H2, N2, the dominant collision processes in the solar wind, have…J. Han, L. Wei, B. Wang et al.·Jan 22, 2021SaveLearn
Optical coherence and energy-level properties of a Tm3+-doped LiNbO3 waveguide at sub-Kelvin temperaturesWe characterize the optical coherence and energy-level properties of the 795 nm 3H6 to 3H4 transition of Tm3+ in a Ti4+:LiNbO3 waveguide at temperatures as low as 0.65 K.…Neil Sinclair, Daniel Oblak, Erhan Saglamyurek et al.·Jan 21, 2021SaveLearn
Observation of laser-assisted electron scattering in superfluid heliumLaser-assisted electron scattering (LAES), a light-matter interaction process that facilitates energy transfer between strong light fields and free electrons, has so far been observed only in gas…Leonhard Treiber, Bernhard Thaler, Pascal Heim et al.·Jan 20, 2021SaveLearn
Vibrational Quenching of CN- in Collisions with He and ArThe vibrational quenching cross sections and corresponding low-temperature rate constants for the v = 1 and v = 2 states of CN- colliding with He and Ar atoms have been computed ab initio using new…Barry Mant, Ersin Yurtsever, Lola González-Sánchez et al.·Jan 20, 2021SaveLearn
The role of reflections in the generation of a time delay in strong field ionizationThe problem of time delay in tunneling ionization is revisited. The origin of time delay at the tunnel exit is analysed, underlining the two faces of the concept of the tunnelling time delay: the…Daniel Bakucz Canário, Michael Klaiber, Karen Z. Hatsagortsyan et al.·Jan 20, 2021SaveLearn
Frequency-comb-induced radiation pressure force in dense atomic cloudsWe investigate the frequency comb induced radiation pressure force acting on a cloud of cold 87Rb atoms. Reduction and spectral broadening of the frequency comb force are observed as the cloud's…Mateo Kruljac, Danijel Buhin, Domagoj Kovacic et al.·Jan 20, 2021SaveLearn
Resolving closely spaced levels for Doppler mismatched double resonanceIn this paper, we present experimental techniques to resolve the closely spaced hyperfine levels of a weak transition by eliminating the residual/partial two-photon Doppler broadening and cross-over…Elijah Ogaro Nyakang'o, Kanhaiya Pandey·Jan 20, 2021SaveLearn
Velocity preserving transfer between highly excited atomic states: Black Body Radiation and CollisionsWe study the excitation redistribution from cesium 7P1/2 or 7P3/2 to neighboring energy levels by Black Body Radiation (BBR) and inter atomic collisions using pump-probe…J. C. de Aquino Carvalho, I. Maurin, H. Failache et al.·Jan 19, 2021SaveLearn
Stand-alone vacuum cell for compact ultracold quantum technologiesCompact vacuum systems are key enabling components for cold atom technologies, facilitating extremely accurate sensing applications. There has been important progress towards a truly portable compact…Oliver S. Burrow, Paul F. Osborn, Edward Boughton et al.·Jan 19, 2021SaveLearn
Demonstration of Ramsey-Comb Precision Spectroscopy in Xenon at Vacuum Ultraviolet Wavelengths Produced with High-Harmonic GenerationThe remarkable progress in the field of laser spectroscopy induced by the invention of the frequency-comb laser has enabled many new high-precision tests of fundamental theory and searches for new…L. S. Dreissen, C. Roth, E. L. Gründeman et al.·Jan 19, 2021SaveLearn
Fast and efficient preparation of 1D chains and dense cold atomic cloudsWe report the efficient and fast ( 2Hz) preparation of randomly loaded 1D chains of individual 87Rb atoms and of dense atomic clouds trapped in optical tweezers using a new…Antoine Glicenstein, Giovanni Ferioli, Ludovic Brossard et al.·Jan 19, 2021SaveLearn
Hyperfine measurement of 6P1/2 state in 87Rb using double resonance on blue and IR transitionIn this paper, we present the spectroscopy of 6P1/2 state in 87Rb using double resonance technique at 780~nm and 421~nm. The double resonance technique is implemented…Elijah Ogaro Nyakang'o, Dangka Shylla, Vasant Natarajan et al.·Jan 16, 2021SaveLearn
High-temperature photoluminescence reveals the inherent relations between quantum efficiency and emissivityPhotoluminescence (PL) is a light-matter quantum interaction associated with the chemical potential of light formulated by the Generalized Planck's law. Without knowing the inherent temperature…Matej Kurtulik, Rafi Weill, Assaf Manor et al.·Jan 16, 2021SaveLearn
Matter-wave Fractional Revivals in a Ring WaveguideWe report fractional revival phenomena in an ultracold matter wave inside a ring waveguide. The specific fractional revival times are precisely identified and corresponding spatial density patterns…Jayanta Bera, Suranjana Ghosh, Luca Salasnich et al.·Jan 15, 2021SaveLearn
Assessing the Precision of Quantum Simulation of Many-Body Effects in Atomic Systems using the Variational Quantum Eigensolver AlgorithmThe emerging field of quantum simulation of many-body systems is widely recognized as a very important application of quantum computing. A crucial step towards its realization in the context of…Sumeet, V. S. Prasannaa, B. P. Das et al.·Jan 14, 2021SaveLearn
Long-range Rydberg-atom-ion molecules of Rb and CsWe propose a novel type of Rydberg dimer, consisting of a Rydberg-state atom bound to a distant positive ion. The molecule is formed through long-range electric-multipole interaction between the…A. Duspayev, X. Han, M. A. Viray et al.·Jan 13, 2021SaveLearn
Loading and spatially-resolved characterization of a cold atomic ensemble inside a hollow-core fiberWe present a thorough experimental investigation of the loading process of laser-cooled atoms from a magneto-optical trap into an optical dipole trap located inside a hollow-core photonic bandgap…Thorsten Peters, Leonid P. Yatsenko, Thomas Halfmann·Jan 13, 2021SaveLearn
High ellipticity of harmonics from molecules in strong laser fields of small ellipticityWe study high-order harmonic generation (HHG) from aligned molecules in strong elliptically polarized laser fields numerically and analytically. Our simulations show that the spectra and polarization…F. J. Sun, C. Chen, W. Y. Li et al.·Jan 13, 2021SaveLearn
Dark-state sideband cooling in an atomic ensembleWe utilize the dark state in a -type three-level system to cool an ensemble of 85Rb atoms in an optical lattice [Morigi et al., Phys. Rev. Lett. 85, 4458 (2000)]. The common suppression of…Chang Huang, Shijie Chai, Shau-Yu Lan·Jan 12, 2021SaveLearn