Publications (20)
Rotating optical cavity experiment testing Lorentz invariance at the 10^{-17} level
S. Herrmann, A. Senger, K. Möhle +3
We present an improved laboratory test of Lorentz invariance in electrodynamics by testing the isotropy of the speed of light. Our measurement compares the resonance frequencies of…
All-Optical Matter-Wave Lens using Time-Averaged Potentials
H. Albers, R. Corgier, A. Herbst +11
The stability of matter-wave sensors benefits from interrogating large-particle-number atomic ensembles at high cycle rates. The use of quantum-degenerate gases with their low effe…
Identifying charged particle background events in X-ray imaging detectors with novel machine learning algorithms
D. R. Wilkins, S. W. Allen, E. D. Miller +8
Space-based X-ray detectors are subject to significant fluxes of charged particles in orbit, notably energetic cosmic ray protons, contributing a significant background. We develop…
hp-finite-elements for simulating electromagnetic fields in optical devices with rough textures
S. Burger, P. Gutsche, M. Hammerschmidt +5
The finite-element method is a preferred numerical method when electromagnetic fields at high accuracy are to be computed in nano-optics design. Here, we demonstrate a finite-eleme…
Detector Damage at X-Ray Free-Electron Laser Sources
G. Blaj, G. Carini, S. Carron +8
Free-electron lasers (FELs) opened a new window on imaging the motion of atoms and molecules. At SLAC, FEL experiments are performed at LCLS using 120 Hz pulses with 10^12 to 10^13…
Testing Lorentz Invariance by Comparing Light Propagation in Vacuum and Matter
M. Nagel, K. Möhle, K. Döringshoff +4
We present a Michelson-Morley type experiment for testing the isotropy of the speed of light in vacuum and matter. The experiment compares the resonance frequency of a monolithic o…
Differential atom interferometry with Rb and Rb for testing the UFF in STE-QUEST
C Schubert, J Hartwig, H Ahlers +18
In this paper we discuss in detail an experimental scheme to test the universality of free fall (UFF) with a differential Rb / Rb atom interferometer applicable for e…
Optimal pulse processing, pile-up decomposition and applications of silicon drift detectors at LCLS
G. Blaj, C. J. Kenney, A. Dragone +15
Silicon drift detectors (SDDs) revolutionized spectroscopy in fields as diverse as geology and dentistry. For a subset of experiments at ultra-fast, x-ray free-electron lasers (FEL…
A Coprocessor for Accelerating Visual Information Processing
W. Stechele, L. Alvado Carcel, S. Herrmann +1
Visual information processing will play an increasingly important role in future electronics systems. In many applications, e.g. video surveillance cameras, data throughput of micr…
New Results on DEPFET Pixel Detectors for Radiation Imaging and High Energy Particle Detection
N. Wermes, L. Andricek, P. Fischer +19
DEPFET pixel detectors are unique devices in terms of energy and spatial resolution because very low noise (ENC = 2.2e at room temperature) operation can be obtained by implementin…
Quantum test of the Universality of Free Fall using rubidium and potassium
H. Albers, A. Herbst, L. L. Richardson +11
We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges a…
Experimental limits for low-frequency space-time fluctuations from ultrastable optical resonators
S. Schiller, C. Laemmerzahl, H. Mueller +3
It has been suggested that space-time might undergo fluctuations because of its intrinsic quantum nature. These fluctuations would pose a fundamental limit to the ability of measur…
Concept study and preliminary design of a cold atom interferometer for space gravity gradiometry
A. Trimeche, B. Battelier, D. Becker +14
We study a space-based gravity gradiometer based on cold atom interferometry and its potential for the Earth's gravitational field mapping. The instrument architecture has been pro…
High precision modeling at the 10^{-20} level
M. Andres, L. Banz, A. Costea +6
The requirements for accurate numerical simulation are increasing constantly. Modern high precision physics experiments now exceed the achievable numerical accuracy of standard com…
hp-finite element method for simulating light scattering from complex 3D structures
S. Burger, L. Zschiedrich, J. Pomplun +2
Methods for solving Maxwell's equations are integral part of optical metrology and computational lithography setups. Applications require accurate geometrical resolution, high nume…
X-ray speed reading: enabling fast, low noise readout for next-generation CCDs
S. Herrmann, P. Orel, T. Chattopadhyay +7
Current, state-of-the-art CCDs are close to being able to deliver all key performance figures for future strategic X-ray missions except for the required frame rates. Our Stanford…
Augmenting astronomical X-ray detectors with AI for enhanced sensitivity and reduced background
D. R. Wilkins, A. Poliszczuk, B. Schneider +13
Bringing artificial intelligence (AI) alongside next-generation X-ray imaging detectors, including CCDs and DEPFET sensors, enhances their sensitivity to achieve many of the flagsh…
STE-QUEST - Test of the Universality of Free Fall Using Cold Atom Interferometry
D. Aguilera, H. Ahlers, B. Battelier +63
The theory of general relativity describes macroscopic phenomena driven by the influence of gravity while quantum mechanics brilliantly accounts for microscopic effects. Despite th…
Enhancing the sensitivity of next-generation X-ray imaging detectors with artificial intelligence and advanced event reconstruction algorithms
D. R. Wilkins, A. Poliszczuk, A. Y. Pan +11
Advanced algorithms incorporating artificial intelligence and machine learning (AI/ML) enhance the sensitivity of X-ray imaging detectors and the scientific capabilities of future…
Interferometry with Bose-Einstein Condensates in Microgravity
H. Müntinga, H. Ahlers, M. Krutzik +41
Atom interferometers covering macroscopic domains of space-time are a spectacular manifestation of the wave nature of matter. Due to their unique coherence properties, Bose-Einstei…