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 ...

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 ...

Frequenzen sind die am präzisesten messbaren physikalischen Größen. Viele Messprinzipien und Geräte basieren daher primär auf der Bestimmung der Phase und Frequenz eines genauen und stabilen Oszillators. Die präzise ...

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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 ...

Photoelectron momentum distributions from strong-field ionization are calculated by numerical solution of the one-electron time-dependent Schrödinger equation for a model atom including effects beyond the electric dipole ...

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 ...

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 ...

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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 ...