Auflistung Fakultät für Mathematik und Physik nach Titel

Auflistung Fakultät für Mathematik und Physik nach Titel

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  • Fabrication and analysis of co-diffused n-type silicon solar cells applying plasma-deposited diffusion sources 
    Wehmeier, Nadine (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2016)
    [no abstract]
  • Fabrication of a monolithic lab-on-a-chip platform with integrated hydrogel waveguides for chemical sensing 
    Torres-Mapa, Maria Leilani; Singh, Manmeet; Simon, Olga; Mapa, Jose Louise; Machida, Manan; Günther, Axel; Roth, Bernhard; Heinemann, Dag; Terakawa, Mitsuhiro; Heisterkamp, Alexander (Basel : MDPI AG, 2019)
    Hydrogel waveguides have found increased use for variety of applications where biocompatibility and flexibility are important. In this work, we demonstrate the use of polyethylene glycol diacrylate (PEGDA) waveguides to ...
  • Fabrication of a single-electron transistor by current-controlled local oxidation of a two-dimensional electron system 
    Keyser, U.F.; Schumacher, Hans W.; Zeitler, U.; Haug, Rolf J.; Eberl, K. (College Park, MD : American Institute of Physics, 2000)
    The surface layers of a GaAs/AlGaAs heterostructure are locally oxidized using an atomic force microscope. The local anodic oxidation depletes the underlying two-dimensional electron gas leading to the formation of tunneling ...
  • Fabrication of polymer based integrated photonic devices by maskless lithography 
    Rahlves, Maik (Bellingham, WA : S P I E - International Society for Optical Engineering, 2016)
    We present our recent results on the fabrication of photonic devices such as single-mode and few-mode waveguides, Ycouplers as well as integrated interferometric sensor devices. The devices were created by means of a ...
  • Fabrication of quantum point contacts by engraving GaAs/AlGaAs heterostructures with a diamond tip 
    Regul, J.; Keyser, U.F.; Paesler, M.; Hohls, Frank; Zeitler, U.; Haug, Rolf J.; Malavé, A.; Oesterschulze, E.; Reuter, D.; Wieck, A.D. (College Park, MD : American Institute of Physics, 2002)
    We use the all-diamond tip of an atomic force microscope for the direct engraving of high-quality quantum point contacts in GaAs/AlGaAs heterostructures. The processing time is shortened by two orders of magnitude compared ...
  • Factorisation of equivariant spectral triples in unbounded KK-theory 
    Forsyth, Iain; Rennie, Adam (Cambridge : Cambridge Univ. Press, 2019)
    We provide sufficient conditions to factorise an equivariant spectral triple as a Kasparov product of unbounded classes constructed from the group action on the algebra and from the fixed point spectral triple. We show ...
  • Factorization of density matrices in the critical RSOS models 
    Westerfeld, Daniel; Großpietsch, Maxime; Kakuschke, Hannes; Frahm, Holger (Bristol : IOP Publ., 2023)
    We study reduced density matrices of the integrable critical restricted solid-on-solid (RSOS) model in a particular topological sector containing the ground state. Similar as in the spin- 1/2 Heisenberg model it has been ...
  • Faddeev equations with three-nucleon force in momentum space 
    Stadler, A.; Glöckle, W.; Sauer, P.U. (College Park, MD : American Physical Society, 1991)
    Modified Faddeev equations that allow the inclusion of irreducible three-body forces in addition to two-body interactions are formulated and the technical apparatus for their solution in momentum space is described. Results ...
  • Failure stress of epitaxial silicon thin films 
    Käsewieter, Jörg; Kajari-Schröder, Sarah; Niendorf, Thomas; Brendel, Rolf (Amsterdam : Elsevier, 2013)
    Ultra-thin silicon wafer have to withstand forces and stresses during handling procedures without breakage. Here we investigate the failure stresses of ?30 ?m thick monocrystalline silicon films produced with the porous ...
  • Failures of weak approximation in families 
    Bright, M.J.; Browning, T.D.; Loughran, D. (Cambridge : Cambridge University Press, 2016)
    Given a family of varieties over a number field, we determine conditions under which there is a Brauer-Manin obstruction to weak approximation for 100% of the fibres which are everywhere locally soluble. © The Authors 2016.
  • Families of curves with Higgs field of arbitrarily large kernel 
    González‐Alonso, Víctor; Torelli, Sara (Hoboken, NJ : Wiley, 2021)
    In this article, we consider the flat bundle (Formula presented.) and the kernel (Formula presented.) of the Higgs field naturally associated to any (polarized) variation of Hodge structures of weight 1. We study how strict ...
  • Families of stable sheaves: Wrong-way fibers and noncommutative deformations 
    Reede, Fabian (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    In this thesis we want to understand properties of families of stable sheaves. First we give a quick introduction to the topic. Then we look at three specific topics regarding families of stable sheaves: a) stability ...
  • Fano schemes of lines on singular cubic hypersurfaces and their Picard schemes 
    Heckel, Tobias (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)
    To every cubic hypersurface $X$ we associate the parameter space of lines contained in $X$; this is called the Fano scheme of lines on $X$ and denoted $F(X)$. If X admits an isolated singular point of ADE-type, we prove ...
  • Farthest points and monotone operators 
    Westphal, U.; Schwartz, T. (Cambridge : Cambridge University Press, 1998)
    We apply the theory of monotone operators to study farthest points in closed bounded subsets of real Banach spaces. This new approach reveals the intimate connection between the farthest point mapping and the subdifferential ...
  • Fast adiabatic transport of single laser-cooled 9Be+ ions in a cryogenic Penning trap stack 
    Meiners, Teresa; Coenders, Julia A.; Brombacher, Johannes; Niemann, Malte; Cornejo, Juan M.; Ulmer, Stefan; Ospelkaus, Christian (Berlin ; Heidelberg : Springer, 2024)
    High precision mass and g-factor measurements in Penning traps have enabled groundbreaking tests of fundamental physics. The most advanced setups use multi-trap methods, which employ transport of particles between specialized ...
  • Fast and accurate sensitivity estimation for continuous-gravitational-wave searches 
    Dreissigacker, Christoph; Prix, Reinhard; Wette, Karl (College Park : American Physical Society, 2018)
    This paper presents an efficient numerical sensitivity-estimation method and implementation for continuous-gravitational-wave searches, extending and generalizing an earlier analytic approach by Wette [1]. This estimation ...
  • Fast manipulation of Bose-Einstein condensates with an atom chip 
    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 ...
  • Fast reaction products from the oxidation of CO on Pt(111): Angular and velocity distributions of the CO2 product molecules 
    Allers, K.-H.; Pfnür, Herbert; Feulner, P.; Menzel, D. (College Park, MD : American Institute of Physics, 1994)
    Angular and velocity distributions of CO2 desorbing as reaction product of CO oxidation on Pt(111) were measured during heating of layers of initially molecular oxygen and CO adsorbed at a surface temperature of 100 K. In ...
  • Fast transport of Bose-Einstein condensates 
    Torrontegui, E.; Chen, Xi; Modugno, M.; Schmidt, S.; Ruschhaupt, A.; Muga, J. G. (Bristol : IOP Publishing Ltd., 2012)
    We propose an inverse method to accelerate without final excitation the adiabatic transport of a Bose-Einstein condensate. The method is based on a partial extension of the Lewis-Riesenfeld invariants and provides transport ...
  • Fast-tunable femtosecond visible radiation via sum-frequency generation from a high power NIR NOPO 
    Binhammer, Yuliya; Binhammer, Thomas; Mevert, Robin; Lang, Tino; Rück, Angelika; Morgner, Uwe (Washington, DC : Optica, 2021)
    We report on a high power ultra-broadband, quickly tunable non-collinear parametric oscillator with highly efficient intra-cavity sum-frequency generation. It simultaneously delivers femtosecond pulses in two synchronized ...

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