Auflistung nach Schlagwort "Ions"

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  • Access to metastable complex ion conductors via mechanosynthesis: Preparation, microstructure and conductivity of (Ba,Sr)LiF3 with inverse perovskite structure 
    Düvel, A.; Wegner, S.; Efimov, K.; Feldhoff, A.; Heitjans, Paul; Wilkening, Martin (Cambridge : Royal Society of Chemistry, 2011)
    Highly metastable Ba1−xSrxLiF3 (0 < x ≤ xmax ≈ 0.4) with an inverse perovskite structure analogous to that of BaLiF3 was synthesized by soft mechanical treatment of BaF2 and LiF together with SrF2 at ambient temperature. ...
  • Algorithmic Ground-State Cooling of Weakly Coupled Oscillators Using Quantum Logic 
    King, Steven A.; Spieß, Lukas J.; Micke, Peter; Wilzewski, Alexander; Leopold, Tobias; Crespo López-Urrutia, José R.; Schmidt, Piet O. (College Park, Md. : APS, 2021)
    The majority of ions and other charged particles of spectroscopic interest lack the fast, cycling transitions that are necessary for direct laser cooling. In most cases, they can still be cooled sympathetically through ...
  • Anionic fluorophore-assisted fabrication of gold microstructures inside a hydrogel by multi-photon photoreduction 
    Machida, Manan; Shen, Weilu; Onoe, Hiroaki; Hiruta, Yuki; Heisterkamp, Alexander; Mazur, Eric; Terakawa, Mitsuhiro (Washington, DC : OSA - The Optical Society, 2021)
    The fabrication of accentuated gold microstructures is demonstrated by multi-photon photoreduction inside an anionic fluorophore-containing hydrogel. We attempted to facilitate gold-ion photoreduction near the focal point ...
  • Calcium ions decrease water-soaking in strawberries 
    Hurtado, Grecia; Knoche, Moritz (San Francisco, California, US : PLOS, 2022)
    Water soaking is a common disorder of field-grown strawberries (Fragaria × ananassa Duch.). It develops when ripe fruit is exposed to rain. Here we investigate the effects of Ca on water soaking. Fruit was incubated in ...
  • Closed-cycle, low-vibration 4 K cryostat for ion traps and other applications 
    Micke, P.; Stark, J.; King, S.A.; Leopold, T.; Pfeifer, T.; Schmöger, L.; Schwarz, M.; Spieß, L.J.; Schmidt, P.O.; Crespo López-Urrutia, J.R. ([Erscheinungsort nicht ermittelbar] : American Institute of Physics, 2019)
    In vacuo cryogenic environments are ideal for applications requiring both low temperatures and extremely low particle densities. This enables reaching long storage and coherence times, for example, in ion traps, essential ...
  • Coulomb crystallization of highly charged ions 
    Schmöger, L.; Versolato, O.O.; Schwarz, M.; Kohnen, M.; Windberger, A.; Piest, B.; Feuchtenbeiner, S.; Pedregosa, J.; Leopold, T.; Micke, P.; Hansen, A.K.; Baumann, T.M.; Drewsen, M.; Ullrich, J.; Schmidt, Piet O.; Crespo López-Urrutia, J.R. (Bristol : IOP Publishing Ltd., 2015)
    Sympathetic Coulomb crystallization of highly charged ions, retrapped in a cryogenic radiofrequency trap, is demonstrated by an over seven orders-of-magnitude decrease in motional temperature.
  • Creation of silicon vacancy color centers with a narrow emission line in nanodiamonds by ion implantation 
    Takashima, Hideaki; Fukuda, Atsushi; Shimazaki, Konosuke; Iwabata, Yusuke; Kawaguchi, Hiroki; Schell, Andreas W.; Tashima, Toshiyuki; Abe, Hiroshi; Onoda, Shinobu; Ohshima, Takeshi; Takeuchi, Shigeki (Washington, DC : Optica, 2021)
    Nanodiamonds containing silicon-vacancy (SiV) centers with high brightness, high photo-stability, and a narrow zero phonon line (ZPL) have attracted attention for bioimaging, nanoscale thermometry, and quantum technologies. ...
  • Cryogenic 9Be+ Penning trap for precision measurements with (anti-)protons 
    Niemann, M.; Meiners, T.; Mielke, J.; Borchert, M.J.; Cornejo, J.M.; Ulmer, S.; Ospelkaus, C. (Bristol : Institute of Physics Publishing, 2019)
    Cooling and detection schemes using laser cooling and methods of quantum logic can contribute to high precision CPT symmetry tests in the baryonic sector. This work introduces an experiment to sympathetically cool protons ...
  • Cryogenic linear Paul trap for cold highly charged ion experiments 
    Schwarz, M.; Versolato, O.O.; Windberger, A.; Brunner, F.R.; Ballance, T.; Eberle, S.N.; Ullrich, J.; Schmidt, Piet O.; Hansen, A.K.; Gingell, A.D.; Drewsen, M.; Crespo López-Urrutia, J.R. (College Park, MD : American Institute of Physics, 2012)
    Storage and cooling of highly charged ions require ultra-high vacuum levels obtainable by means of cryogenic methods. We have developed a linear Paul trap operating at 4 K capable of very long ion storage times of about ...
  • Detection of motional ground state population of a trapped ion using delayed pulses 
    Gebert, Florian; Wan, Yong; Wolf, F.; Heip, J.C.; Schmidt, Piet O. (Bristol : Institute of Physics Publishing, 2016)
    Efficient preparation and detection of the motional state of trapped ions is important in many experiments ranging from quantum computation to precision spectroscopy. We investigate the stimulated Raman adiabatic passage ...
  • Efficient sympathetic motional-ground-state cooling of a molecular ion 
    Wan, Yong; Gebert, Florian; Wolf, Fabian; Schmidt, Piet O. (College Park, MD : American Physical Society, 2015)
    Cold molecular ions are promising candidates in various fields ranging from precision spectroscopy and test of fundamental physics to ultracold chemistry. Control of internal and external degrees of freedom is a prerequisite ...
  • Enhanced conductivity at the interface of Li2O:B2O3 nanocomposites: Atomistic models 
    Islam, Mazharul M.; Bredow, Thomas; Indris, Sylvio; Heitjans, Paul (College Park, ML : American Physical Society, 2007)
    A theoretical investigation at density-functional level of Li ion conduction at the interfaces in Li2O:B2O3 nanocomposites is presented. The structural disorder at the Li2O(111):B2O3(001) interface leads to reduced defect ...
  • Evaluation of a Sr+ 88 Optical Clock with a Direct Measurement of the Blackbody Radiation Shift and Determination of the Clock Frequency 
    Steinel, M.; Shao, H.; Filzinger, M.; Lipphardt, B.; Brinkmann, M.; Didier, A.; Mehlstäubler, T. E.; Lindvall, T.; Peik, E.; Huntemann, N. (College Park, Md. : APS, 2023)
    We report on an evaluation of an optical clock that uses the S21/2→D25/2 transition of a single Sr+88 ion as the reference. In contrast to previous work, we estimate the effective temperature of the blackbody radiation ...
  • Finite-temperature spectrum at the symmetry-breaking linear to zigzag transition 
    Kiethe, Jan; Timm, Lars; Landa, Haggai; Kalincev, Dimitri; Morigi, Giovanna; Mehlstäubler, Tanja E. (Woodbury, NY : Inst., 2021)
    We investigate the normal-mode spectrum of a trapped ion chain at the symmetry-breaking linear to zigzag transition and at finite temperatures. For this purpose, we modulate the amplitude of the Doppler cooling laser to ...
  • High kinetic energy-ion mobility spectrometry-mass spectrometry investigations of several volatiles and their fully deuterated analogues 
    Weiss, Florentin; Eiceman, Gary; Märk, Tilmann D.; Mayhew, Chris A.; Ruzsanyi, Veronika; Schaefer, Christoph; Zimmermann, Stefan (Berlin ; Heidelberg : Springer, 2022)
    The first High Kinetic Energy-Ion Mobility Spectrometry-Mass Spectrometry (HiKE-IMS-MS) studies involving six volatiles (acetone, acetonitrile, methanol, ethanol, 2-propanol, and 1-butanol) and their fully deuterated ...
  • Highly Efficient Ion Manipulator for Tandem Ion Mobility Spectrometry: Exploring a Versatile Technique by a Study of Primary Alcohols 
    Bohnhorst, Alexander; Zygmanowski, Anne; Yin, Yu; Kirk, Ansgar T.; Zimmermann, Stefan (Columbus, Ohio : American Chemical Society, 2023)
    In this work, we present a tandem ion mobility spectrometer (IMS) utilizing a highly efficient ion manipulator allowing to store, manipulate, and analyze ions under high electric field strengths and controlled ion-neutral ...
  • Improved Electrochemical Performance of Modified Mesocarbon Microbeads for Lithium-Ion Batteries Studied using Solid-State Nuclear Magnetic Resonance Spectroscopy 
    Bösebeck, Katharina; Chandran, C. Vinod; Licht, Björn K.; Binnewies, Michael; Heitjans, Paul (Weinheim : Wiley-VCH Verlag, 2016)
    Lithium-intercalating materials such as graphite are of great interest, especially for application in lithium-ion batteries. In this work we present an investigation of the electrochemical performance of mesocarbon microbeads ...
  • Integrated fiber-mirror ion trap for strong ion-cavity coupling 
    Brandstätter, B.; McClung, A.; Schüppert, K.; Casabone, B.; Friebe, K.; Stute, A.; Schmidt, Piet O.; Deutsch, C.; Reichel, J.; Blatt, R.; Northup, T.E. (College Park, MD : American Institute of Physics, 2013)
    We present and characterize fiber mirrors and a miniaturized ion-trap design developed to integrate a fiber-based Fabry-Perot cavity (FFPC) with a linear Paul trap for use in cavity-QED experiments with trapped ions. Our ...
  • Ion Beam Processing for Sample Preparation of Hybrid Materials with Strongly Differing Mechanical Properties 
    Barienti, Khemais; Kahra, Christoph; Herbst, Sebastian; Nürnberger, Florian; Maier, Hans Jürgen (Heidelberg : Springer, 2020)
    For studies of the interface zone of metallic composites with significantly differing mechanical properties across the interface, high-quality sample preparation is paramount. In particular, the analysis of the composition ...
  • Ionic polaron in a Bose-Einstein condensate 
    Astrakharchik, Grigory E.; Ardila, Luis A. Peña; Schmidt, Richard; Jachymski, Krzysztof; Negretti, Antonio (London : Springer Nature, 2021)
    The presence of strong interactions in a many-body quantum system can lead to a variety of exotic effects. Here we show that even in a comparatively simple setup consisting of a charged impurity in a weakly interacting ...