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  • 0.75 atoms improve the clock signal of 10,000 atoms 
    Kruse, I.; Lange, K.; Peise, J.; Lücke, Bernd; Pezzè, L.; Arlt, Jan J.; Ertmer, Wolfgang; Lisdat, C.; Santos, Luis; Smerzi, A.; Klempt, Carsten (Bellingham, WA : S P I E - International Society for Optical Engineering, 2017)
    Since the pioneering work of Ramsey, atom interferometers are employed for precision metrology, in particular to measure time and to realize the second. In a classical interferometer, an ensemble of atoms is prepared in ...
  • The 100th anniversary of the four-point probe technique: the role of probe geometries in isotropic and anisotropic systems 
    Miccoli, Ilio; Edler, Frederik; Pfnür, Herbert; Tegenkamp, Christoph (Bristol : IOP Publishing Ltd., 2015-06-10)
    The electrical conductivity of solid-state matter is a fundamental physical property and can be precisely derived from the resistance measured via the four-point probe technique excluding contributions from parasitic contact ...
  • 127I NQR and Crystal Structure Studies of [N(CH3)4]2CdI4 
    Ishihara, Hideta; Horiuchi, Keizo; Gesing, Thorsten M.; Dou, Shi-Qi; Buhl, Josef-Christian; Terao, Hiromitsu (Berlin : De Gruyter, 2000)
    The temperature dependence of 1271 NQR and DSC as well as the crystal structure at room temperature of the title compound were determined. This compound shows a first-order phase transition of an order-disorder type at 245 ...
  • 137Cs in the meat of wild boars: a comparison of the impacts of Chernobyl and Fukushima 
    Steinhauser, Georg; Saey, Paul R. J. (Cham : Springer, 2016)
    The impact of Chernobyl on the 137Cs activities found in wild boars in Europe, even in remote locations from the NPP, has been much greater than the impact of Fukushima on boars in Japan. Although there is great variability ...
  • 1D-Plasmonen in Ag-Nanodrähten auf vicinalem Si(557) 
    Krieg, Ulrich (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2014)
    [no abstract]
  • The 2020 photovoltaic technologies roadmap 
    Wilson, Gregory M.; Al-Jassim, Mowafak; Metzger, Wyatt K.; Glunz, Stefan W.; Verlinden, Pierre; Xiong, Gang; Mansfield, Lorelle M.; Stanbery, Billy J.; Zhu, Kai; Yan, Yanfa; Berry, Joseph J.; Ptak, Aaron J.; Dimroth, Frank; Kayes, Brendan M.; Tamboli, Adele C.; Peibst, Robby; Catchpole, Kylie; Reese, Matthew O.; Klinga, Christopher S.; Denholm, Paul; Morjaria, Mahesh; Deceglie, Michael G.; Freeman, Janine M.; Mikofski, Mark A.; Jordan, Dirk C.; TamizhMani, Govindasamy; Sulas-Kern, Dana B. (Bristol : IOP Publ., 2020)
    Over the past decade, the global cumulative installed photovoltaic (PV) capacity has grown exponentially, reaching 591 GW in 2019. Rapid progress was driven in large part by improvements in solar cell and module efficiencies, ...
  • 2023 roadmap on photocatalytic water splitting 
    Bahnemann, Detlef; Robertson, Peter; Wang, Chuanyi; Choi, Wonyong; Daly, Helen; Danish, Mohtaram; de Lasa, Hugo; Escobedo, Salvador; Hardacre, Christopher; Jeon, Tae Hwa; Kim, Bupmo; Kisch, Horst; Li, Wei; Long, Mingce; Muneer, M; Skillen, Nathan; Zhang, Jingzheng (Bristol : IOP Publishing, 2023)
    As a consequence of the issues resulting from global climate change many nations are starting to transition to being low or net zero carbon economies. To achieve this objective practical alternative fuels are urgently ...
  • 2×10-13 Fractional Laser-Frequency Stability with a 7-cm Unequal-Arm Mach-Zehnder Interferometer 
    Huarcaya, Victor; Álvarez, Miguel Dovale; Penkert, Daniel; Gozzo, Stefano; Cano, Pablo Martínez; Yamamoto, Kohei; Delgado, Juan José Esteban; Mehmet, Moritz; Danzmann, Karsten; Heinzel, Gerhard (College Park, Md. [u.a.] : American Physical Society, 2023)
    To achieve subpicometer sensitivities in the millihertz band, laser interferometric inertial sensors rely on some form of reduction of the laser-frequency noise, typically by locking the laser to a stable frequency reference, ...
  • 350-fold improved measurement of the antiproton magnetic moment using a multi-trap method 
    Smorra, Christian; Blessing, Pascal E.; Borchert, Matthias J.; Devlin, Jack A.; Harrington, James A.; Higuchi, Takashi; Morgner, Jonathan; Nagahama, Hiroki; Sellner, Stefan; Bohman, Matthew A.; Mooser, Andreas H.; Schneider, Georg L.; Schön, Natalie; Wiesinger, Markus; Blaum, Klaus; Matsuda, Yasuyuki; Ospelkaus, Christian; Quint, Wolfgang; Walz, Jochen; Yamazaki, Yasunori; Ulmer, Stefan (New York, NY : Springer International Publishing, 2018)
    We summarize our recent 1.5 parts per billion measurement of the antiproton magnetic moment using the multi Penning-trap system of the BASE collaboration. The result was achieved by combining the detection of individual ...
  • 3D geometry measurement of hot cylindric specimen using structured light 
    Quentin, Lorenz; Beermann, Rüdiger; Pösch, Andreas; Reithmeier, Eduard; Kästner, Markus (Bellingham, Wash. : SPIE, 2017)
    We present a fringe projection system to measure glowing hot hybrid components in between production processes. For this a high power green light projector, based on TI DLP technology, is used to create the highest possible ...
  • 3D imaging of biofilms on implants by detection of scattered light with a scanning laser optical tomograph 
    Heidrich, Marko; Kühnel, Mark P.; Kellner, Manuela; Lorbeer, Raoul-Amadeus; Lange, Tineke; Winkel, Andreas; Stiesch, Meike; Meyer, Heiko; Heisterkamp, Alexander (Washington, DC : Optical Society of America, 2011)
    Biofilms - communities of microorganisms attached to surfaces - are a constant threat for long-term success in modern implantology. The application of laser scanning microscopy (LSM) has increased the knowledge about ...
  • 3D mixed virtual element formulation for dynamic elasto-plastic analysis 
    Cihan, Mertcan; Hudobivnik, Blaž; Aldakheel, Fadi; Wriggers, Peter (Berlin, Heidelberg : Springer, 2021)
    The virtual element method (VEM) for dynamic analyses of nonlinear elasto-plastic problems undergoing large deformations is outlined within this work. VEM has been applied to various problems in engineering, considering ...
  • 3D printed microfluidic lab-on-a-chip device for fiber-based dual beam optical manipulation 
    Wang, Haoran; Enders, Anton; Preuss, John-Alexander; Bahnemann, Janina; Heisterkamp, Alexander; Torres-Mapa, Maria Leilani ([London] : Macmillan Publishers Limited, part of Springer Nature, 2021)
    3D printing of microfluidic lab-on-a-chip devices enables rapid prototyping of robust and complex structures. In this work, we designed and fabricated a 3D printed lab-on-a-chip device for fiber-based dual beam optical ...
  • 3D registration of depth data of porous surface coatings based on 3D phase correlation and the trimmed ICP algorithm 
    Loftfield, Nina; Kästner, Markus; Reithmeier, Eduard (Bellingham, Wash. : SPIE, 2017)
    A critical factor of endoprostheses is the quality of the tribological pairing. The objective of this research project is to manufacture stochastically porous aluminum oxide surface coatings with high wear resistance and ...
  • 40K-87Rb Feshbach resonances: Modeling the interatomic potential 
    Klempt, Carsten; Henninger, T.; Topic, O.; Will, J.; Ertmer, Wolfgang; Tiemann, E.; Arlt, Jan J. (College Park : American Physical Society, 2007)
    We have observed 28 heteronuclear Feshbach resonances in ten spin combinations of the hyperfine ground states of a 40K−87Rb mixture. The measurements were performed by observing the loss rates from an atomic mixture at ...
  • 4D supersymmetric gauge theories of spacetime translations 
    Brandt, Friedemann (Berlin, Heidelberg : Springer, 2022)
    The paper addresses the question whether in four spacetime dimensions, besides standard supergravity theories, field theories exist whose symmetries include local spacetime translations and supersymmetries generated by ...
  • 9Be+ ion qubit control using an optical frequency comb 
    Paschke, Anna-Greta (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2017)
    [no abstract]
  • A Bayesian estimation method for variational phase-field fracture problems 
    Khodadadian, Amirreza; Noii, Nima; Parvizi, Maryam; Abbaszadeh, Mostafa; Wick, Thomas; Heitzinger, Clemens (Berlin : Springer, 2020)
    In this work, we propose a parameter estimation framework for fracture propagation problems. The fracture problem is described by a phase-field method. Parameter estimation is realized with a Bayesian approach. Here, the ...
  • A coating thermal noise interferometer for the AEI 10 m prototype facility 
    Westphal, Tobias (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2016)
    [no abstract]
  • A continuously pumped reservoir of ultracold atoms 
    Mahnke, Jan (Hannover : Gottfried Wilhelm Leibniz Universität Hannover, 2015)
    [no abstract]