QUEST-Leibniz-Forschungsschule: Recent submissions

  • The Influence of laser relative intensity noise on space-based heterodyne interferometers - from the LISA Pathfinder to the LISA Mission 
    Wissel, Lennart (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2024)
    This thesis investigates the influence of laser relative intensity noise on the phase measurement of heterodyne interferometers, with particular focus on the LISA space mission and noise modeling for its precursor, LISA ...
  • Book of Abstracts for the European Quantum Technologies Conference (EQTC) 2023 
    Quantum Valley Lower Saxony (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2024-03-11)
    The EQTC 2023 held from October 16th to October 20th, 2023, in Hannover, was a week of conference and exhibition. The conference featured over 40 exhibitors, more than two-dozen plenary presentations and panel discussions, ...
  • Upscaling ground-based backpack gamma-ray spectrometry to spatial resolution of UAV-based gamma-ray spectrometry for system validation 
    Altfelder, Sven; Preugschat, Benedikt; Matos, Milan; Kandzia, Felix; Wiens, Benjamin; Eshmuradov, Otabek; Kunze, Christian (New York, NY [u.a.] : Elsevier, 2024)
    Advances in the development of gamma-ray spectrometers have resulted in devices that are ideal for use in conjunction with the increasingly reliable systems of autonomously flying uncrewed aerial vehicles (UAVs) that have ...
  • Levitating the noise performance of ultra-stable laser cavities assisted by a deep neural network: The non-intuitive role of the mirrors 
    Dickmann, J.; Shelling Neto, L.; Gaedtke, M.; Kroker, S. (Washington, DC : Optica, 2023)
    The most precise measurand available to science is the frequency of ultra-stable lasers. With a relative deviation of 4 × 10−17 over a wide range of measuring times between one second and 100 seconds, the smallest effects ...
  • A FPGA based laser DPLL for atom interferometry 
    Papakonstantinou, Alexandros (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2024)
    Atom interferometers have gained attention in both fundamental physics research and practical applications thanks to their high accuracy. Improving them is a widespread area of research and generating highly phase stabilized ...
  • High precision, compact inertial sensors for use in gravitational wave detectors 
    Carter, Jonathan Joseph (Hannover : Institutionelles Repositorium der Leibniz Universität, 2024)
    Operating a gravitational wave detector requires a suite of high-performance inertial and displacement sensors. These sensors are part of a complex control system which isolates optics from seismic disturbances. Despite ...
  • Time-delay interferometric ranging for LISA: Statistical analysis of bias-free ranging using laser noise minimization 
    Staab, Martin Benedikt (Hannover : Institutionelles Repositorium der Leibniz Universität, 2023)
    Die Laser Interferometer Space Antenna (LISA) ist eine Mission der europäischen Weltraumagentur (ESA) zur Detektion von Gravitationswellen im Frequenzbereich zwischen 10^-4 Hz und 1 Hz. Gravitationswellen induzieren relative ...
  • Intersatellite clock synchronization and absolute ranging for gravitational wave detection in space 
    Yamamoto, Kohei (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    The Laser Interferometer Space Antenna (LISA) is a European Space Agency (ESA) large-scale space mission, aiming to detect gravitational waves (GWs) in the observation band of 0.1mHz to 1Hz. The constellation is formed by ...
  • A high-flux cold atom source based on a nano-structured atom chip 
    Heine, Hendrik (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    Modern physics is challenged by existential questions about the most fundamental interactions of matter. While three of the four known fundamental forces are modeled in the grand unified theory [1], gravity seems to be ...
  • A highly stable UV clock laser 
    Kraus, Benjamin (Hannover : Institutionelles Repositorium der Leibniz Universität, 2023)
    Optical clocks are the most precise frequency measurement devices, with a systematic fractional frequency uncertainty as low as 10−18. While these clocks are typically operated in stationary laboratories, there is a growing ...
  • Characterisation and integration of an optomechanical system for an all-optical CQNC experiment 
    Schulte, Bernd Wolfgang (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    This thesis presents the development and characterisation of an optomechanical system (OMS) with the aim to be part of an all-optical coherent quantum noise cancellation scheme (CQNC), as proposed by Tsang & Caves in ...
  • Experimental realization of a 12,000-finesse laser cavity based on a low-noise microstructured mirror 
    Dickmann, Johannes; Sauer, Steffen; Meyer, Jan; Gaedtke, Mika; Siefke, Thomas; Brückner, Uwe; Plentz, Jonathan; Kroker, Stefanie (London : Springer Nature, 2023)
    The most precise measurement tools of humankind are equipped with ultra-stable lasers. State-of-the-art laser stabilization techniques are based on external cavities, that are limited by noise originated in the coatings ...
  • Atom interferometry with ultracold atoms for inertial sensing 
    Gersemann, Matthias (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    In light pulse atom interferometry wave packets are spatially separated and recombined in a coherent manner by interacting with laser pulses. Typically, two photon transitions are used to perform Rabi oscillations between ...
  • Quantum Dynamics in a Ferromagnetic Atomic Gas 
    Meyer-Hoppe, Bernd (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    Bose-Einstein condensates (BECs) provide an extraordinary system to study many-body quantum effects with a high degree of control. Using such ultra-cold gases, microscopic quantum effects become visible on a macroscopic ...
  • In-Depth Characterization of the First Inter-Satellite Laser Ranging Interferometer on GRACE Follow-On 
    Misfeldt, Malte Matthias (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    The GRACE Follow-On (GRACE-FO) satellite mission was launched in May 2018. It continues the time series of monthly estimates of the Earth’s gravity field, started by its predecessor, the Gravity Recovery And Climate ...
  • Predicting the Excitation Dynamics in Lanthanide Nanoparticles 
    Spelthann, Simon; Thiem, Jonas; Melchert, Oliver; Komban, Rajesh; Gimmler, Christoph; Demicran, Ayhan; Ruehl, Axel; Ristau, Detlev (Weinheim : Wiley-VCH, 2023)
    With their dipole-forbidden 4f transitions, lanthanides doped in nanoparticles promise high excited state lifetimes and quantum yields that are required for applications such as composite lasers or nanoscale quantum memories. ...
  • Targeted searches for continuous gravitational waves 
    Ashok, Anjana (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    Gravitational waves are a consequence of Albert Einstein’s General theory of relativity, which he put forward in 1916. One hundred years later, in 2015, a gravitational wave signal from two merging black holes was detected ...
  • Theory of Large-Momentum-Transfer Atom Interferometry in the Quasi-Bragg Regime 
    Kirsten-Siemß, Jan-Niclas (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023)
    Atom interferometers are versatile instruments offering great accuracy and stability, suitable for fundamental science and practical applications. In usual setups, the sensitivity of the sensor to inertial forces including ...
  • Sensitivity to new physics of isotope-shift studies using the coronal lines of highly charged calcium ions 
    Rehbehn, Nils-Holger; Rosner, Michael K.; Bekker, Hendrik; Berengut, Julian C.; Schmidt, Piet O.; King, Steven A.; Micke, Peter; Gu, Ming Feng; Müller, Robert; Surzhykov, Andrey; López-Urrutia, José R. Crespo (Woodbury, NY : Inst., 2021)
    Promising searches for new physics beyond the current standard model (SM) of particle physics are feasible through isotope-shift spectroscopy, which is sensitive to a hypothetical fifth force between the neutrons of the ...
  • Comparing GRACE Follow-On Inter-Satellite Pointing Angles from Star Camera and LRI Fast Steering Mirror 
    Müller, Laura (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2023-07-26)
    The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission is observing the time variable gravity field by measuring distance variations between two satellites. The first Laser Ranging Interferometer (LRI) ...

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