QUEST-Leibniz-Forschungsschule


 

Recent Submissions

  • Krause, Florian (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)
    In this thesis a new practical realization of the meter at a wavelength of 633 nm with a diode laser stabilized on iodine is investigated, with the aim of replacing the old technology of He-Ne lasers with more effective ...
  • Wegener, Henry Paul (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)
    This thesis provides a detailed analysis of the coupling of satellite rotations into the inter-satellite range, measured by the Laser Ranging Interferometer (LRI) onboard the GRACE Follow-On satellites.
  • Schwarz, Roman (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)
    Optical clocks have moved to the forefront of frequency metrology. Their outstanding performances enable the exploration of new fields of research such as the search for dark matter and dark energy [1, 2], temporal drifts ...
  • Li, Wei-Han (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    This Thesis is devoted to the study of particle mobility in polar lattice gases, that is, systems of particles with a large magnetic or electric dipole moment loaded in a deep optical lattice, which may move between sites ...
  • Herbers, Sofia (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    In this work, a transportable ultra-stable laser system based on a Fabry-Pérot cavity with crystalline aluminium gallium arsenide (Al₀․₉₂Ga₀․₀₈As) / gallium arsenide (GaAs) mirror coatings, fused silica glass mirror ...
  • Borchert, Matthias Joachim (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    This thesis describes high precision measurements on the fundamental properties of the antiproton, namely the charge-to-mass ratio and the magnetic moment. This work is embedded in the experimental work of the BASE ...
  • Setyawati, Yoshinta Eka (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021-09-29)
    The first direct gravitational wave detection by LIGO and Virgo in 2015 marked the beginning of the gravitational wave astronomy era. Gravitational waves are an excellent tool to prove general relativity and unveil compact ...
  • Fim, Dominika Barbara (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    The primary frequency and time standard, defined via a transition frequency of caesium-133, is realized by microwave clocks reaching relative uncertainties in the 10−^16 level. This performance has been surpassed by ...
  • Becker, Dennis (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    Quantum sensors based on atom interferometry are precise measurement devices whose ultimate performance can be reached using Bose–Einstein condensates (BECs) in extended free fall. This thesis summarizes the endeavour of ...
  • Bartosch, Wolfgang (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021-10-04)
    Das Finden einer universellen Theorie der physikalischen Grundkräfte stellt einen großen Teil der Anstrengungen der fundamentalen Physik im letzten Jahrzehnt dar. Das Standartmodell der Teilchenphysik scheint mit Einsteins ...
  • Lee, Yongho (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021-09-16)
    A coupling between angular jitter of satellite and length readout, called tilt-to-length coupling, is one of the major noise sources in space-based laser interferometers such as LISA and GRACE Follow-On. With comprehensive ...
  • Kiethe, Jan (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    Trapped ion Coulomb crystals are regularly used as analogue simulators for physical systems, for which the access to the dynamics of the individual particles is lacking or which are hard to simulate using classical computers. ...
  • Idel, Alexander (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    Quantum Sensors, like atom interferometers (AI), can be employed for high-precision measurements of inertial forces, including their application as gravimeters, gradiometers, accelerometers, and gyroscopes. Their ...
  • Bondarenko, Dmytro (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    Entangled possibly mixed states are an essential resource for quantum computation, communication, metrology, and the simulation of many-body systems. It is important to develop and improve preparation protocols for such ...
  • Piest, Baptist (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    Im Rahmen dieser Arbeit wird die atomchipbasierte Experimentierkammer für den Einsatz in den Höhenforschungsraketenmissionen MAIUS-2 und 3 aufgebaut und mit einem bodengestützten System in Betrieb genommen. Die neue ...
  • Feldmann, Polina (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2021)
    Entanglement lies at the core of emergent quantum technologies such as quantum-enhanced metrology, quantum communication and cryptography, and quantum simulation and computing. Spinor Bose-Einstein condensates (BECs) offer ...
  • Schulte, Marius (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)
    This thesis describes new results on the entanglement of atomic spins in Ramsey interferometry, optical atomic clocks and trapped ions. It is divided into three parts: First, we investigate improvements to conventional ...
  • Steinecke, Morten; Kellermann, Tarik; Jupé, Marco; Ristau, Detlev; Jensen, Lars (Bellingham : SPIE, 2018)
    The exploitation of nonlinear effects in multi-layer thin films allows for optics with novel functions, such as all-optical switching and frequency conversion. In this contribution, an improved interferometric setup for ...
  • Lachmann, Maike Diana (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)
    Hochpräzise Atominterferometrie mit Bose-Einstein-Kondensaten hat das Potential Tests fundamentaler Physik mit bisher unerreichter Genauigkeit durchzuführen, sowie die Entwicklung neuartiger Sensoren für die Erdbeobachtung ...
  • Momeni Pakdehi, Davood (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2020)
    The electrical quantum standards have played a decisive role in modern metrology, particularly since the introduction of the revised International System of Units (SI) in May 2019. By adapting the basic units to exactly ...

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