• A phase-field description for mixed-mode fracture propagation 

  Meng, Fan; Yan, Jin; Thomas, Wick (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)

  The goal of this work is to develop a phase-field fracture model capable of capturing mixed- mode fracture propagation behavior. In nature, failure of rocks and rock-like materials is usually accompanied by the propagation ...
• Null vectors in logarithmic conformal field theory 

  Flohr, Michael (Trieste : Sissa Medialab Srl, 2000)

  The representation theory of the Virasoro algebra in the case of a logarithmic conformal field theory is considered. Here, indecomposable representations have to be taken into account, which has many interesting consequences. ...
• Pure Yang–Mills solutions on dS 4 

  Ivanova, Tatiana A.; Lechtenfeld, Olaf; Popov, Alexander D. (Trieste : Sissa Medialab Srl, 2017)

  We consider pure SU(2) Yang–Mills theory on four-dimensional de Sitter space dS 4 and construct smooth and spatially homogeneous classical Yang–Mills fields. Slicing dS 4 as ℝ×S 3 , via an SU(2)-equivariant ansatz we reduce ...
• Noncommutative instantons and solitons 

  Lechtenfeld, Olaf (Trieste : Sissa Medialab Srl, 2003)

  I explain how to construct noncommutative BPS configurations in four and lower dimensions by solving linear matrix equations. Examples are instantons in D=4 Yang-Mills, monopoles in D=3 Yang-Mills-Higgs, and (moving) ...
• GEO 600: Building a gravitational wave observatory 

  Hewitson, Martin (Trieste : Sissa Medialab Srl, 2005)

  An international network of laser-interferometric gravitational wave detectors is nearing the end of the main commissioning phase and will soon enter into an extended observational period, collecting data for a duration ...
• Design and commissioning of an experiment for sympathetic cooling and coupling of ions in a cryogenic Penning trap 

  Niemann, Malte (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)

  Precise comparisons between the properties of matter and antimatter conjugates constitute a stringent test of CPT and Lorentz symmetries. The proton’s and antiproton’s magnetic moments have recently been measured to high ...
• Finite-size effects and spin-orbit coupling in low-dimensional systems 

  Quentin, Monika (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)

  Materials with reduced dimensionalities, such as 2D and quasi-1D systems, are associated with a variety of instabilities accompanied by a wealth of phase transitions. This thesis treats four systems, each consisting of a ...
• Optical spectroscopy of donor bound excitons and spin relaxation of donor electrons in isotopically enriched silicon 

  Beck, Michael (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)

  The spin of electrons bound to neutral phosphorus donors in isotopically enriched silicon is a promising candidate for future quantum information processing. In this thesis, the intriguing properties of the associated ...
• Scaling the Decay of Turbulence Kinetic Energy in the Free-Convective Boundary Layer 

  El Guernaoui, Omar; Reuder, Joachim; Esau, Igor; Wolf, Tobias; Maronga, Björn (Dordrecht : Springer Netherland, 2019)

  We investigate the scaling for decaying turbulence kinetic energy (TKE) in the free-convective boundary layer, from the time the surface heat flux starts decaying, until a few hours after it has vanished. We conduct a set ...
• Improved surface passivation and reduced parasitic absorption in PEDOT:PSS/c-Si heterojunction solar cells through the admixture of sorbitol 

  Halbich, Marc-Uwe; Zielke, Dimitri; Gogolin, Ralf; Sauer-Stieglitz, Rüdiger; Lövenich, Wilfried; Schmidt, Jan (London : Nature Publishing Group, 2019)

  We examine the impact of sorbitol admixture to the hole-conduction polymer PEDOT:PSS [poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)] on the characteristics of PEDOT:PSS/crystalline silicon heterojunction solar ...
• Central Tethyan platform-top hypoxia during Oceanic Anoxic Event 1a 

  Hueter, Alexander; Huck, Stefan; Bodin, Stéphane; Heimhofer, Ulrich; Weyer, Stefan; Jochum, Klaus P.; Immenhauser, Adrian (Göttingen : Copernicus GmbH, 2019)

  Short-term hypoxia in epeiric water masses is a common phenomenon of modern marine environments and causes mass mortality in coastal marine ecosystems. Here, we test the hypothesis that during the early Aptian, platform-top ...
• Topic Study Group No. 2: Mathematics Education at Tertiary Level 

  Giraldo, Victor; Rasmussen, Chris; Biza, Irene; Khakbaz, Azimehsadat; Hochmuth, Reinhard (New York, NY : Springer International Publishing, 2017)

  [No abstract available]
• Search for multimessenger sources of gravitational waves and high-energy neutrinos with advanced LIGO during its first observing run, ANTARES, and IceCube 

  Albert, A.; André, M.; Anghinolfi, M.; Ardid, M.; Aubert, J.-J.; IceCube Collaboration; Adya, V. B.; Affeldt, C.; Aufmuth, P.; Bergmann, G.; Biscoveanu, S.; Bisht, A.; Bode, N.; Booker, P.; Brinkmann, M.; Cabero, M.; Danilishin, Stefan L.; Dent, T.; Varona, O. de; Doravari, S.; Hanke, J.; Koehlenbeck, S.M.; Koper, N.; Kringel, V.; Kuehn, G.; Leavey, S.; Lehmann, J.; Lough, J.D.; Lück, H.; Mehmet, M.; Mukherjee, Arunava; Nery, M.; Ohme, F.; Oppermann, P.; Phelps, M.; Puncken, O.; Rüdiger, A.; Schreiber, E.; Schulte, B.W.; Setyawati, Y.; Standke, M.; Steinke, M.; Steinmeyer, D.; Thies, F.; Vahlbruch, H.; Wei, L.-W.; Weinert, M.; Wellmann, F.; Weßels, P.; Wilken, D.M.; Willke, B.; Wimmer, M.H.; Winkler, W.; Wittel, H.; Woehler, J.; Wu, D.S.; LIGO Scientific Collaboration; VIRGO Collaboration; Hennig, M.; Heurs, J.; Junker, K.S.; Karvinen, S.; Kaufer, S.; Khan, R.; Kirchhoff, P.; Koch, M. M. (Bristol : IOP Publishing Ltd., 2019)

  Astrophysical sources of gravitational waves, such as binary neutron star and black hole mergers or core-collapse supernovae, can drive relativistic outflows, giving rise to non-thermal high-energy emission. High-energy ...
• Research on Teaching and Learning Mathematics at the Tertiary Level: State-of-the-Art and Looking Ahead 

  Biza, Irene; Giraldo, Victor; Hochmuth, Reinhard; Sadat Khakbaz, Azimeh; Rasmussen, Chris (New York, NY : Springer International Publishing, 2016)

  This topical survey focuses on research in tertiary mathematics education, a field that has experienced considerable growth over the last 10 years. Drawing on the most recent journal publication as well as the latest ...
• On the free-precession candidate PSR B1828-11: Evidence for increasing deformation 

  Ashton, G.; Jones, D.I.; Prix, Reinhard (Oxford : Oxford University Press (OUP), 2017)

  We observe that the periodic variations in spin-down rate and beam-width of the radio pulsar PSR B1828-11 are getting faster. In the context of a free precession model, this corresponds to a decrease in the precession ...
• Every finite system of T1 uniformities comes from a single distance structure 

  Heitzig, Jobst (Valencia : Universitat Politecnica de Valencia, 2002)

  Using the general notion of distance function introduced in an earlier paper, a construction of the finest distance structure which induces a given quasi-uniformity is given. Moreover, when the usual defining condition xy ...
• Exact BPS bound for noncommutative baby Skyrmions 

  Domrin, Andrei V.; Lechtenfeld, Olaf; Linares, Román; Maceda, Marco (Amsterdam : Elsevier B.V., 2013)

  The noncommutative baby Skyrme model is a Moyal deformation of the two-dimensional sigma model plus a Skyrme term, with a group-valued or Grassmannian target. Exact abelian solitonic solutions have been identified analytically ...
• Double-slit photoelectron interference in strong-field ionization of the neon dimer 

  Kunitski, Maksim; Eicke, Nicolas; Huber, Pia; Köhler, Jonas; Zeller, S.; Voigtsberger, J.; Schlott, Nikolai; Henrichs, Kevin; Sann, H.; Trinter, F.; Schmidt, L.; Kalinin, Anton; Schöffler, M.; Jahnke, T.; Lein, Manfred; Dörner, R. (London : Nature Publishing Group, 2019)

  Wave-particle duality is an inherent peculiarity of the quantum world. The double-slit experiment has been frequently used for understanding different aspects of this fundamental concept. The occurrence of interference ...
• Design and construction of an optical test bed for LISA imaging systems and tilt-to-length coupling 

  Chwalla, M.; Danzmann, Karsten; Fernández Barranco, G.; Fitzsimons, E.; Gerberding, Oliver; Heinzel, Gerhard; Killow, Christian J.; Lieser, M.; Perreur-Lloyd, M.; Robertson, D.I.; Schuster, Sönke; Schwarze, Thomas S.; Tröbs, M.; Ward, H.; Zwetz, M. (Bristol : IOP Publishing, 2016)

  The laser interferometer space antenna (LISA) is a future space-based interferometric gravitational-wave detector consisting of three spacecraft in a triangular configuration. The interferometric measurements of path length ...
• Spectroscopic investigation of the three lowest doublet states of LiSr 

  Schwanke, Erik (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)

  Molecules consisting of an alkali and an alkaline earth atom are currently investigated with the aim of using them in experiments to explore diverse physical phenomena. This thesis is concerned with the observation and ...

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