A. Lompe, R. Seeliger, E. Wolter,
... p. 9-37 Article Untersuchungen an Hohlkathoden A. Lompe, A. Lompe Studiengesellschaft für elektrische Beleuchtung, BerlinSearch for more papers ... BerlinSearch for more papers by this author A. Lompe, A. Lompe Studiengesellschaft für elektrische Beleuchtung, BerlinSearch for more papers ...
Tópico(s): Electrohydrodynamics and Fluid Dynamics
1939 - Wiley | Annalen der Physik
A. Ø. Hovland, K. M. Laundal, Jone Peter Reistad, Spencer Hatch, Simon James Walker, Michael Madelaire, Anders Ohma,
... technique, called Local Mapping of Polar Ionospheric Electrodynamics (Lompe), is implemented in Python (Laundal et al., 2022a). The Lompe technique combines spherical elementary current system analysis, finite ... we go through these different components of the Lompe code and show how they are useful on ... mission. We also demonstrate how to use the Lompe code to produce a coherent picture of ionospheric ...
Tópico(s): Geomagnetism and Paleomagnetism Studies
2022 - Frontiers Media | Frontiers in Astronomy and Space Sciences
... Der Gradient der positiven Säule in Edelgasen A. Lompe, A. LompeSearch for more papers by this authorR. ... SeeligerSearch for more papers by this author A. Lompe, A. LompeSearch for more papers by this authorR. ...
Tópico(s): Photochemistry and Electron Transfer Studies
1932 - Wiley | Annalen der Physik
Anne Rieder, Svein Halvor Knutsen, Aida Sainz Fernandez, Simon Ballance,
... flour and a Norwegian type of soft wrap (lompe) for their ability to reduce glycaemic responses in ... glucan per serving was inversely correlated with GI. Lompe had a similar medium GI (63) than the ... beta-glucan breads (56 and 64). However, while "lompe" had significantly lower amounts of rapidly digestible starch, ...
Tópico(s): Proteins in Food Systems
2019 - Royal Society of Chemistry | Food & Function
... H., BerlinSearch for more papers by this authorA. Lompe, A. Lompe Studiengesellschaft für elektrische Beleuchtung m. b. H., BerlinSearch ... H., BerlinSearch for more papers by this authorA. Lompe, A. Lompe Studiengesellschaft für elektrische Beleuchtung m. b. H., BerlinSearch ...
Tópico(s): Quantum, superfluid, helium dynamics
1938 - Wiley | Annalen der Physik
Jürgen Lembke, U. Krusch, Arved Lompe, Michael Teuber,
During a two year screening period, approximately 200 phages active against lactic streptococci have been isolated in a cheese factory from raw milk, cheese whey and starter culture using an indicator set of 24 strains of Streptococcus lactis, 17 strains of S. cremoris and 16 strains of S. lactis subsp. diacetylactis. Electron microscopy of these phages suggests the existence of at least 14 distinct morphological types. The ultrastructural and host range properties of 14 typical phage types are ...
Tópico(s): Microbial infections and disease research
1980 - Elsevier BV | Zentralblatt für Bakteriologie I Abt Originale C Allgemeine angewandte und ökologische Mikrobiologie
A. N. Wenz, Thomas Lompe, T. B. Ottenstein, Friedhelm Serwane, G. Zürn, Selim Jochim,
We show that the recently measured magnetic field dependence of three-body loss in a three-component mixture of ultracold $^{6}\text{L}\text{i}$ atoms [T. B. Ottenstein et al., Phys. Rev. Lett. 101, 203202 (2008); J. H. Huckans et al., Phys. Rev. Lett. 102, 165302 (2009)] can be explained by the presence of a universal trimer state. Previous work suggested a universal trimer state as a probable explanation, yet it failed to get good agreement between theory and experiment over the whole range of magnetic ...
Tópico(s): Advanced Frequency and Time Standards
2009 - American Physical Society | Physical Review A
T. B. Ottenstein, Thomas Lompe, M. Kohnen, A. N. Wenz, Selim Jochim,
We report on the creation of a degenerate Fermi gas consisting of a balanced mixture of atoms in three different hyperfine states of $^{6}\mathrm{Li}$. This new system consists of three distinguishable fermions with different and tunable interparticle scattering lengths ${a}_{12}$, ${a}_{13}$, and ${a}_{23}$. We are able to prepare samples containing $5\ifmmode\times\else\texttimes\fi{}{10}^{4}$ atoms in each state at a temperature of about 215 nK, which corresponds to $T/{T}_{F}\ensuremath{\approx}0.37$. ...
Tópico(s): Physics of Superconductivity and Magnetism
2008 - American Physical Society | Physical Review Letters
Thomas Lompe, T. B. Ottenstein, Friedhelm Serwane, Kirsten Viering, A. N. Wenz, G. Zürn, Selim Jochim,
Ultracold gases of three distinguishable particles with large scattering lengths are expected to show rich few-body physics related to the Efimov effect. We have created three different mixtures of ultracold 6Li atoms and weakly bound 6Li2 dimers consisting of atoms in three different hyperfine states and studied their inelastic decay via atom-dimer collisions. We have found resonant enhancement of the decay due to the crossing of Efimov-like trimer states with the atom-dimer continuum in one mixture ...
Tópico(s): Atomic and Subatomic Physics Research
2010 - American Physical Society | Physical Review Letters
Thomas Lompe, T. B. Ottenstein, Friedhelm Serwane, A. N. Wenz, G. Zürn, Selim Jochim,
The quantum-mechanical three-body problem is one of the fundamental challenges of few-body physics. When the two-body interactions become resonant, an infinite series of universal three-body bound states is predicted to occur, whose properties are determined by the strength of the two-body interactions. We report on the association and direct observation of a trimer state consisting of three distinguishable fermions using radio-frequency (RF) spectroscopy. The measurements of its binding energy are ...
Tópico(s): Nonlinear Photonic Systems
2010 - American Association for the Advancement of Science | Science
Friedhelm Serwane, G. Zürn, Thomas Lompe, T. B. Ottenstein, A. N. Wenz, Selim Jochim,
Systems consisting of few interacting fermions are the building blocks of matter, with atoms and nuclei being the most prominent examples. We have created a few-body quantum system with complete control over its quantum state using ultracold fermionic atoms in an optical dipole trap. Ground-state systems consisting of 1 to 10 particles are prepared with fidelities of ∼90%. We can tune the interparticle interactions to arbitrary values using a Feshbach resonance and have observed the interaction-induced ...
Tópico(s): Quantum and electron transport phenomena
2011 - American Association for the Advancement of Science | Science
G. Zürn, Friedhelm Serwane, Thomas Lompe, A. N. Wenz, Mario Ries, Johanna E. Bohn, Selim Jochim,
In this work we study a system of two distinguishable fermions in a 1D harmonic potential. This system has the exceptional property that there is an analytic solution for arbitrary values of the interparticle interaction. We tune the interaction strength via a magnetic offset field and compare the measured properties of the system to the theoretical prediction. At the point where the interaction strength diverges, the energy and square of the wave function for two distinguishable particles are the ...
Tópico(s): Quantum Mechanics and Applications
2012 - American Physical Society | Physical Review Letters
... experimental results [G. Z\"urn, F. Serwane, T. Lompe, A. N. Wenz, M. G. Ries, J. E. ...
Tópico(s): Advanced Chemical Physics Studies
2012 - American Physical Society | Physical Review Letters
Puneet A. Murthy, Dhruv Kedar, Thomas Lompe, M. Neidig, M. G. Ries, A. N. Wenz, G. Zürn, Selim Jochim,
We demonstrate and characterize an experimental technique to directly image the momentum distribution of a strongly interacting two-dimensional quantum gas with high momentum resolution. We apply the principles of Fourier optics to investigate three main operations on the expanding gas: focusing, collimation and magnification. We focus the gas in the radial plane using a harmonic confining potential and thus gain access to the momentum distribution. We pulse a different harmonic potential to stop ...
Tópico(s): Atomic and Subatomic Physics Research
2014 - American Physical Society | Physical Review A
A. N. Wenz, G. Zürn, Simon Murmann, Ioannis Brouzos, Thomas Lompe, Selim Jochim,
Knowing when a physical system has reached sufficient size for its macroscopic properties to be well described by many-body theory is difficult. We investigate the crossover from few to many-body physics by studying quasi one-dimensional systems of ultracold atoms consisting of a single impurity interacting with an increasing number of identical fermions. We measure the interaction energy of such a system as a function of the number of majority atoms for different strengths of the interparticle ...
Tópico(s): Physics of Superconductivity and Magnetism
2013 - American Association for the Advancement of Science | Science
Simon Sala, G. Zürn, Thomas Lompe, A. N. Wenz, Simon Murmann, Friedhelm Serwane, Selim Jochim, Alejandro Sáenz,
We perform a theoretical and experimental study of a system of two ultracold atoms with tunable interaction in an elongated trapping potential. We show that the coupling of center-of-mass and relative motion due to an anharmonicity of the trapping potential leads to a coherent coupling of a state of an unbound atom pair and a molecule with a center of mass excitation. By performing the experiment with exactly two particles we exclude three-body losses and can therefore directly observe coherent ...
Tópico(s): Laser-Matter Interactions and Applications
2013 - American Physical Society | Physical Review Letters
G. Zürn, A. N. Wenz, Simon Murmann, Andrea Bergschneider, Thomas Lompe, Selim Jochim,
We study quasi-one-dimensional few-particle systems consisting of one to six ultracold fermionic atoms in two different spin states with attractive interactions. We probe the system by deforming the trapping potential and by observing the tunneling of particles out of the trap. For even particle numbers, we observe a tunneling behavior that deviates from uncorrelated single-particle tunneling indicating the existence of pair correlations in the system. From the tunneling time scales, we infer the ...
Tópico(s): Quantum many-body systems
2013 - American Physical Society | Physical Review Letters
... Z\"urn, A. N. Wenz, S. Murmann, T. Lompe, and S. Jochim, arXiv:1307.5153].
Tópico(s): Quantum Mechanics and Applications
2013 - American Physical Society | Physical Review A
G. Zürn, Thomas Lompe, A. N. Wenz, Selim Jochim, Paul S. Julienne, Jeremy M. Hutson,
We perform radio-frequency dissociation spectroscopy of weakly bound 6Li2 Feshbach molecules using low-density samples of about 30 molecules in an optical dipole trap. Combined with a high magnetic field stability, this allows us to resolve the discrete trap levels in the radio-frequency dissociation spectra. This novel technique allows the binding energy of Feshbach molecules to be determined with unprecedented precision. We use these measurements as an input for a fit to the 6Li scattering potential ...
Tópico(s): Advanced Frequency and Time Standards
2013 - American Physical Society | Physical Review Letters
M. G. Ries, A. N. Wenz, G. Zürn, Luca Bayha, Igor Boettcher, Dhruv Kedar, Puneet A. Murthy, M. Neidig, Thomas Lompe, Selim Jochim,
The condensation of fermion pairs lies at the heart of superfluidity. However, for strongly correlated systems with reduced dimensionality the mechanisms of pairing and condensation are still not fully understood. In our experiment we use ultracold atoms as a generic model system to study the phase transition from a normal to a condensed phase in a strongly interacting quasi-two-dimensional Fermi gas. Using a novel method, we obtain the in situ pair momentum distribution of the strongly interacting ...
Tópico(s): Quantum, superfluid, helium dynamics
2015 - American Physical Society | Physical Review Letters
Simon Murmann, F. Deuretzbacher, G. Zürn, J. Bjerlin, S. M. Reimann, L. Santos, Thomas Lompe, Selim Jochim,
We report on the deterministic preparation of antiferromagnetic Heisenberg spin chains consisting of up to four fermionic atoms in a one-dimensional trap. These chains are stabilized by strong repulsive interactions between the two spin components without the need for an external periodic potential. We independently characterize the spin configuration of the chains by measuring the spin orientation of the outermost particle in the trap and by projecting the spatial wave function of one spin component ...
Tópico(s): Strong Light-Matter Interactions
2015 - American Physical Society | Physical Review Letters
Simon Murmann, Andrea Bergschneider, Vincent M. Klinkhamer, G. Zürn, Thomas Lompe, Selim Jochim,
We have prepared two ultracold fermionic atoms in an isolated double-well potential and obtained full control over the quantum state of this system. In particular, we can independently control the interaction strength between the particles, their tunneling rate between the wells and the tilt of the potential. By introducing repulsive (attractive) interparticle interactions we have realized the two-particle analog of a Mott-insulating (charge-density-wave) state. We have also spectroscopically observed ...
Tópico(s): Physics of Superconductivity and Magnetism
2015 - American Physical Society | Physical Review Letters
Pino D’Amico, Massimo Rontani,
... energy observed in Z\"urn, Wenz, Murmann, Bergschneider, Lompe, and Jochim, Phys. Rev. Lett. 111, 175302 (2013). ...
Tópico(s): Strong Light-Matter Interactions
2015 - American Physical Society | Physical Review A
Lawrence W. Cheuk, Matthew A. Nichols, Melih Okan, Thomas Gersdorf, Vinay Ramasesh, Waseem Bakr, Thomas Lompe, Martin W. Zwierlein,
We realize a quantum-gas microscope for fermionic ^{40}K atoms trapped in an optical lattice, which allows one to probe strongly correlated fermions at the single-atom level. We combine 3D Raman sideband cooling with high-resolution optics to simultaneously cool and image individual atoms with single-lattice-site resolution at a detection fidelity above 95%. The imaging process leaves the atoms predominantly in the 3D motional ground state of their respective lattice sites, inviting the implementation ...
Tópico(s): Electronic and Structural Properties of Oxides
2015 - American Physical Society | Physical Review Letters
Kim Maren Lompe, David Ménard, Benoît Barbeau,
Combining the high adsorption capacity of powdered activated carbon (PAC) with magnetic properties of iron oxide nanoparticles (NPs) leads to a promising composite material, magnetic PAC or MPAC, which can be separated from water using magnetic separators. We propose MPAC as an alternative adsorbent in the biological hybrid membrane process and demonstrate that PAC covered with magnetic NPs is suitable as growth support for heterotrophic and nitrifying bacteria. MPAC with mass fractions of 0; 23; ...
Tópico(s): Water Treatment and Disinfection
2016 - Elsevier BV | Water Research
Kim Maren Lompe, David Ménard, Benoît Barbeau,
Combining powdered activated carbon (PAC) with magnetic iron oxides has been proposed in the past to produce adsorbents for natural organic matter (NOM) removal that can be easily separated using a magnetic field. However, the trade-off between the iron oxides' benefits and the reduced carbon content, porosity, and surface area has not yet been investigated systematically. We produced 3 magnetic powdered activated carbons (MPAC) with mass fractions of 10%, 38% and 54% maghemite nanoparticles and compared ...
Tópico(s): Radioactive element chemistry and processing
2017 - Elsevier BV | Water Research
Klaus Hueck, Niclas Luick, Lennart Sobirey, Jonas Siegl, Thomas Lompe, Henning Moritz, Logan W. Clark, Cheng Chin,
Absorption imaging of ultracold atoms is the foundation for quantitative extraction of information from experiments with ultracold atoms. Due to the limited exposure time available in these systems, the signal-to-noise ratio is largest for high intensity absorption imaging where the intensity of the imaging light is on the order of the saturation intensity. In this case, the absolute value of the intensity of the imaging light enters as an additional parameter making it more sensitive to systematic ...
Tópico(s): Advanced Frequency and Time Standards
2017 - Optica Publishing Group | Optics Express
Klaus Hueck, Niclas Luick, Lennart Sobirey, Jonas Siegl, Thomas Lompe, Henning Moritz,
We report on the experimental realization of homogeneous two-dimensional (2D) Fermi gases trapped in a box potential. In contrast to harmonically trapped gases, these homogeneous 2D systems are ideally suited to probe local as well as nonlocal properties of strongly interacting many-body systems. As a first benchmark experiment, we use a local probe to measure the density of a noninteracting 2D Fermi gas as a function of the chemical potential and find excellent agreement with the corresponding equation ...
Tópico(s): Physics of Superconductivity and Magnetism
2018 - American Physical Society | Physical Review Letters
Kim Maren Lompe, Sung Vo Duy, Sigrid Peldszus, Sébastien Sauvé, Benoît Barbeau,
This study evaluated the adsorption capacity and rate constants for 9 micropollutants (MP) on fresh and aged magnetic powdered activated carbon (MPAC) as a magnetically separable alternative to conventional PAC for drinking water treatment. MPAC with mass fractions of 10%, 38% and 54% maghemite nanoparticles were compared to bare PAC and pure maghemite in batch adsorption experiments. Pure maghemite alone did not adsorb significant amounts of MP and when normalized to PAC content, no significant differences ...
Tópico(s): Adsorption and biosorption for pollutant removal
2018 - Elsevier BV | Journal of Hazardous Materials
Zhen Liu, Kim Maren Lompe, Madjid Mohseni, Pierre R. Bérubé, Sébastien Sauvé, Benoît Barbeau,
Biological ion exchange (BIEX) has proved to remove natural organic matter (NOM) better than biological activated carbon (BAC). This raises the question if BIEX can be integrated into a full-scale drinking water treatment plant to remove NOM and ammonia. In this study, a pilot plant consisting of one BIEX filter, three GAC filters and one BAC filter was set up as second-stage filtration at the Sainte-Rose drinking water treatment plant (Laval, Canada). The pilot plant was operated for a period of nine ...
Tópico(s): Urban Stormwater Management Solutions
2019 - Elsevier BV | Water Research