Browsing by Subject "Atoms"

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  • Wodey, E.; Tell, D.; Rasel, E.M.; Schlippert, D.; Baur, R.; Kissling, U.; Kölliker, B.; Lorenz, M.; Marrer, M.; Schläpfer, U.; Widmer, M.; Ufrecht, C.; Stuiber, S.; Fierlinger, P. (College Park, MD : American Institute of Physics, 2020)
    We report on the design, construction, and characterization of a 10 m-long high-performance magnetic shield for very long baseline atom interferometry. We achieve residual fields below 4 nT and longitudinal inhomogeneities ...
  • Gaa, Johannes; Kahrs, Lüder Alexander; Müller, Samuel; Majdani, Omid; Ortmaier, Tobias (Bellingham, WA : S P I E - International Society for Optical Engineering, 2015)
    Planning and analyzing of surgical interventions are often based on computer models derived from computed tomography images of the patient. In the field of cochlear implant insertion the modeling of several structures of ...
  • 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.
  • Binnewies, T.; Wilpers, G.; Sterr, U.; Riehle, F.; Helmcke, J.; Mehlstäubler, T.E.; Rasel, Ernst Maria; Ertmer, Wolfgang (American Physical Society, 2001)
    Ultracold atoms at temperatures close to the recoil limit have been achieved by extending Doppler cooling to forbidden transitions. A cloud of 40Ca atoms has been cooled and trapped to a temperature as low as 6μK by operating ...
  • Titova, V.; Veith-Wolf, B.; Startsev, D.; Schmidt, J. (London : Elsevier Ltd., 2017)
    We characterize the surface passivation properties of ultrathin titanium oxide (TiOx) films deposited by atomic layer deposition (ALD) on crystalline silicon by means of carrier lifetime measurements. We compare different ...
  • Corgier, R.; Amri, S.; Herr, W.; Ahlers, H.; Rudolph, J.; Guéry-Odelin, D.; Rasel, Ernst Maria; Charron, E.; Gaaloul, Naceur (Bristol : Institute of Physics Publishing, 2018)
    We present a detailed theoretical analysis of the implementation of shortcut-to-adiabaticity protocols for the fast transport of neutral atoms with atom chips. The objective is to engineer transport ramps with durations ...
  • Heinze, Jannes; Deuretzbacher, Frank; Pfannkuche, Daniela (College Park, MD : American Physical Society, 2010)
    We study the dependency of the quantum spin dynamics on the particle number in a system of ultracold spin-1 atoms within the single-spatial-mode approximation. We find, for all strengths of the spin-dependent interaction, ...
  • Corgier, Robin; Loriani, Sina; Ahlers, Holger; Posso-Trujillo, Katerine; Schubert, Christian; Rasel, Ernst M.; Charron, Eric; Gaaloul, Naceur (Bristol : IOP Publishing Ltd., 2020)
    We present a source engineering concept for a binary quantum mixture suitable as input for differential, precision atom interferometry with drift times of several seconds. To solve the non-linear dynamics of the mixture, ...
  • Dumke, R.; Müther, T.; Volk, M.; Ertmer, Wolfgang; Birkl, G. (American Physical Society, 2002)
    We experimentally demonstrate interferometer-type guiding structures for neutral atoms based on dipole potentials created by microfabricated optical systems. As a central element we use an array of atom waveguides being ...
  • Ranitzsch, P.C.-O.; Arnold, D.; Beyer, J.; Bockhorn, L.; Bonaparte, J.J.; Enss, C.; Kossert, K.; Kempf, S.; Loidl, M.; Mariam, R.; Nähle, O.J.; Paulsen, M.; Rodrigues, M.; Wegner, M. (Heidelberg : Springer Verlag, 2019)
    Accurate decay data of radionuclides are necessary for many fields of science and technology, ranging from medicine and particle physics to metrology. However, data that are in use today are mostly based on measurements ...
  • Freier, C.; Hauth ,M.; Schkolnik, V.; Leykauf, B.; Schilling, Manuel; Wziontek, H.; Scherneck, H.-G.; Müller, J.; Peters, A. (Bristol : Institute of Physics Publishing, 2016)
    Changes of surface gravity on Earth are of great interest in geodesy, earth sciences and natural resource exploration. They are indicative of Earth system's mass redistributions and vertical surface motion, and are usually ...
  • van der Zwan, Elmar V.; Lein, Manfred (College Park, MD : American Physical Society, 2012)
    Accurate molecular imaging via high-order harmonic generation relies on comparing harmonic emission from a laser-irradiated molecule and an adequate reference system. However, an ideal reference atom with the same ionization ...
  • Shvetsov-Shilovski, N.I.; Lein, M.; Madsen, L.B.; Räsänen, E.; Lemell, C.; Burgdörfer, J.; Arbó, D.G.; Tkési, K. (Bristol : Institute of Physics Publishing, 2017)
    Synopsis We present a non-perturbative semiclassical model for strong-field ionization that accounts for path interferences of tunnel-ionized electrons in the ionic potential within the framework of a classical trajectory ...
  • Dettmer, S.; Hellweg, D.; Ryytty, P.; Arlt, Jan J.; Ertmer, Wolfgang; Sengstock, K.; Petrov, D.S.; Shlyapnikov, G.V.; Kreutzmann, H.; Santos, Luis; Lewenstein, M. (American Physical Society, 2001)
    The occurrence of phase fluctuations due to thermal excitations in Bose-Einstein condensates (BECs) is studied for a variety of temperatures and trap geometries. We observe the statistical nature of the appearance of phase ...
  • Friebe, J.; Riedmann, M.; Wübbena, T.; Pape, A.; Kelkar, H.; Ertmer, Wolfgang; Terra, O.; Sterr, Uwe; Weyers, S.; Grosche, G.; Schnatz, H.; Rasel, Ernst Maria (Bristol : IOP Publishing Ltd., 2011)
    We perform Ramsey-Bordé spectroscopy on laser-cooled magnesium atoms in free fall to measure the 1S 0→ 3P 1 intercombination transition frequency. The measured value of 655 659 923 839 730 (48) Hz is consistent with our ...
  • Bouton, Quentin; Nettersheim, Jens; Adam, Daniel; Schmidt, Felix; Mayer, Daniel; Lausch, Tobias; Tiemann, Eberhard; Widera, Artur (College Park, MD : American Physical Society, 2020)
    Quantum probes are atomic sized devices mapping information of their environment to quantum-mechanical states. By improving measurements and at the same time minimizing perturbation of the environment, they form a central ...
  • Liu, Yunquan; Tschuch, S.; Rudenko, A.; Dürr, M.; Siegel, M.; Morgner, Uwe; Moshammer, R.; Ullrich, J. (American Physical Society, 2008)
    Nonsequential double ionization of Ar by 45 fs laser pulses (800 nm) at (4-7)×1013W/cm2 was explored in fully differential measurements. Well below the field-modified recollision threshold we enter the multiphoton regime. ...
  • Brée, C.; Hofmann, M.; Demircan, A.; Morgner, Uwe; Kosareva, O.; Savel'Ev, A.; Husakou, A.; Ivanov, M.; Babushkin, I. (American Physical Society, 2017)
    The ionization rate of an atom in a strong optical field can be resonantly enhanced by the presence of long-living atomic levels (so-called Freeman resonances). This process is most prominent in the multiphoton ionization ...
  • Meister, Matthias; Roura, Albert; Rasel, Ernst M.; Schleich, Wolfgang P. (Bristol : Institute of Physics Publishing, 2019)
    Atom laser experiments with Bose-Einstein condensates (BECs) performed in ground-based laboratories feature a coherent and directed beam of atoms which is accelerated by gravity. In microgravity the situation is fundamentally ...
  • Hinderthür, H.; Pautz, A.; Rieger, V.; Ruschewitz, F.; Peng, J.L.; Sengstock, K.; Ertmer, Wolfgang (American Physical Society, 1997)
    We present an atom interferometer based on the interference of three partial matter waves in three different internal and external states. Coherent laser excitation acts as a beamsplitter to create a superposition state ...