• Entangled-photons generation with quantum dots 

  Li, Yuan; Ding, Fei; Schmidt, Oliver G. (Bristol, UK : Institute of Physics (IOP), 2018)

  Entanglement between particles is a crucial resource in quantum information processing, an important example of which is the exploitation of entangled photons in quantum communication protocols. Among the different available ...
• Temperature-dependent coercive field measured by a quantum dot strain gauge 

  Chen, Yan; Zhang, Yang; Keil, Robert; Zopf, Michael; Ding, Fei; Schmidt, Oliver G. (Washington : American Chemical Society, 2017)

  Coercive fields of piezoelectric materials can be strongly influenced by environmental temperature. We investigate this influence using a hetero-structure consisting of a single crystal piezoelectric film and a quantum ...
• Energy band modulation of GaAs/Al0.26Ga0.74As quantum well in 3D self-assembled nanomembranes 

  Zhang, Fei; Huang, GaoShang; Nie, XiaoFei; Cao, Xin; Ma, Zhe; Ding, Fei; Di, ZengFeng; Zhen, HongLou; Mei, YongFeng (Amsterdam : Elsevier, 2019)

  In this study, we investigate the modulation of energy band in 3D self-assembled nanomembranes containing GaAs/Al0.26Ga0.74As quantum wells (QWs). Photoluminescence (PL) characterizations demonstrate that the self-assembled ...
• Frequency feedback for two-photon interference from separate quantum dots 

  Zopf, Michael; Macha, Tobias; Keil, Robert; Urunuela, Eduardo; Chen, Yan; Alt, Wolfgang; Ratschbacher, Lothar; Ding, Fei; Meschede, Dieter; Schmidt, Oliver G. (College Park : American Physical Society, 2018)

  We employ active feedback to stabilize the frequency of single photons emitted by two separate quantum dots to an atomic standard. The transmission of a rubidium-based Faraday filter serves as the error signal for frequency ...
• 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 ...

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