A5012458165- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum Information and Cryptography
- Quantum optics and atomic interactions
- Quantum Computing Algorithms and Architecture
- Mitochondrial Function and Pathology
- Advanced Materials Characterization Techniques
- Spectroscopy and Laser Applications
- Photosynthetic Processes and Mechanisms
- Atmospheric Ozone and Climate
- Intraocular Surgery and Lenses
- Machine Learning in Materials Science
- Archaeology and Natural History
- Mechanical and Optical Resonators
- Hydrology and Sediment Transport Processes
- Orbital Angular Momentum in Optics
- Geophysics and Sensor Technology
- Magnetic Field Sensors Techniques
- Ophthalmology and Visual Impairment Studies
- Fungal and yeast genetics research
- Forecasting Techniques and Applications
- Magneto-Optical Properties and Applications
- Sexual Assault and Victimization Studies
- Quantum, superfluid, helium dynamics
Humboldt-Universität zu Berlin
2021-2024
Science and Technology Facilities Council
2024
Rutherford Appleton Laboratory
2024
Ambulatory Rehabilitation Center Berlin Adlershof
2024
Ferdinand-Braun-Institut
2021
University of Strathclyde
2015-2020
Humboldt State University
2020
Trinity University
2019
Rocky Mountain Research (United States)
2011
Rocky Mountain Research Station
2011
Global scale quantum communication links will form the backbone of internet. However, exponential loss in optical fibres precludes any realistic application beyond few hundred kilometres. Quantum repeaters and space-based systems offer to overcome this limitation. Here, we analyse use memory (QM)-equipped satellites for focussing on global range Measurement-Device-Independent (MDI) QKD. We demonstrate that equipped with QMs provide three orders magnitude faster entanglement distribution...
Poff, Boris, Karen A. Koestner, Daniel G. Neary, and Victoria Henderson, 2011. Threats to Riparian Ecosystems in Western North America: An Analysis of Existing Literature. Journal the American Water Resources Association (JAWRA) 47(6):1241–1254. DOI: 10.1111/j.1752-1688.2011.00571.x Abstract: A total 453 journal articles, reports, books, book chapters addressing threats riparian ecosystems western America were analyzed identify, quantify, qualify major these as represented existing...
Microgravity eases several constraints limiting experiments with ultracold and condensed atoms on ground. It enables extended times of flight without suspension eliminates the gravitational sag for trapped atoms. These advantages motivated numerous initiatives to adapt operate experimental setups microgravity platforms. We describe design payload, motivations choices, capabilities Bose-Einstein Condensate Cold Atom Laboratory (BECCAL), a NASA-DLR collaboration. BECCAL builds heritage...
Recent developments in quantum technology have resulted a new generation of sensors for measuring inertial quantities, such as acceleration and rotation. These can exhibit unprecedented sensitivity accuracy when operated space, where the free-fall interrogation time be extended at will environment noise is minimal. European laboratories played leading role this field by developing concepts tools to operate these relevant environment, parabolic flights, towers, or sounding rockets. With...
Abstract The generation of cold atom clouds is a complex process which involves the optimization noisy data in high dimensional parameter spaces. Optimization can be challenging both and especially outside lab due to lack time, expertise, or access for lengthy manual optimization. In recent years, it was demonstrated that machine learning offers solution since optimize problems quickly, without knowledge experiment itself. this paper we present results showing benchmarking nine different...
Nearly two centuries ago Talbot first observed the fascinating effect whereby light propagating through a periodic structure generates 'carpet' of image revivals in near field.Here we report observation spatial for interacting with Bose-Einstein condensate interference fringes.The can lead to dramatic loss fringe visibility images, degrading precision interferometry, however demonstrate how also be used as tool enhance visibility, well extend useful focal range matter wave detection systems...
We have simulated the optical properties of micro-fabricated Fresnel zone plates (FZPs) as an alternative to spatial light modulators (SLMs) for producing non-trivial potentials trap atoms within a lensless arrangement. show that binary (1-bit) FZPs with wavelength (1 \mu m) resolution consistently outperform kinoforms and phase comparable commercial SLMs in root mean square error comparisons, FZP demonstrating increasing improvement complex target intensity distributions. Moreover,...
We optically assess Fresnel zone plates (FZPs) that are designed to guide cold atoms. Imaging of various ring patterns produced by the FZPs gives an average RMS error in brightest part 3% with respect trap depth. This residue is attributed imaging system, incident beam shape and FZP manufacturing tolerances. Axial propagation potentials presented experimentally through numerical simulations, illustrating prospects for atom guiding without requiring light sheets.
Quantum technologies extensively use laser light for state preparation, manipulation, and readout. For field applications, these systems must be robust compact, driving the need miniaturized highly stable optical setups system integration. In this work, we present a micro-integrated crossed-beam dipole trap setup, $\mu$XODT, designed trapping cooling $^{87}\text{Rb}$. This fiber-coupled setup operates at $1064\,\text{nm}$ wavelength with up to $2.5\,\text{W}$ power realizes free-space...
Quantum technologies extensively use laser light for state preparation, manipulation, and readout. For field applications, these systems must be robust compact, driving the need miniaturized highly stable optical setups system integration. In this work, we present a micro-integrated crossed-beam dipole trap setup, µXODT, designed trapping cooling 87 Rb. This fiber-coupled setup operates at 1064 nm wavelength with up to 2.5 W power realizes free-space crossed beam geometry. The µXODT...
The records of 100 patients who had cataract surgery were reviewed to compare preoperative potential acuity meter (PAM) results with postoperative visual acuity. A PAM was obtainable in 95 patients. In 82 the (86%), levels within three lines outcome. Potential substantially lower (less than or equal four Snellen lines) outcome generally occurred when posterior subcapsular (PSC) PSC plus diffuse cortical nuclear changes present. We believe that projection can usually go around through...
Quantum-optical experiments situated in a gravitationally bound experimental setup are fundamentally limited numerous ways, such as the gravitational sag experienced by trapped atoms or free-evolution times of an atomic interferometer.These constraints can be overcome deploying experiment microgravity platform, International Space Station (ISS).The Bose-Einstein Condensate and Cold Atom Laboratory (BECCAL), collaboration between NASA DLR successor to NASA's CAL mission, aims achieve just...
Efficient guidance of physical experiments involving many control parameters presents a challenging optimization problem. In this work, we investigate how machine learning methods can be utilized to dramatically speed up the parameter tuning process pertinent cold-atom sources with applications in quantum memories and atom interferometry. We compare capabilities several strategies controlling experimental report on superior performance scalable Bayesian algorithm, specifically tailored for task.
The generation of cold atom clouds is a complex process which involves the optimization noisy data in high dimensional parameter spaces. Optimization can be challenging both and especially outside lab due to lack time, expertise, or access for lengthy manual optimization. In recent years, it was demonstrated that machine learning offers solution since optimize problems quickly, without knowledge experiment itself. this paper we present results showing benchmarking nine different techniques...
The factors that modulate the reduction potential of complex III's catalytic Rieske metalloprotein subunit (RP) have been subject much study. During bifurcated Q‐cycle, RP transports one electron from quinol to cytochrome c 1 . Quinol's other is passed heme b L H , which reduces a quinone bound at Q N site. If Q‐cycle disrupted, electrons may interact with molecular oxygen produce reactive species (ROS). For example, if RP's too low, it never accept quinol's or do so inefficiently. latter...
We present work on versatile, compact optical components for waveguided atom interferometry with rotation sensing in mind. These diffractive elements: static Fresnel zone plates (FZPs), paired a dynamic spatial light modulator, expand the previous design and construction our group of FZPs smooth, red-detuned waveguides, allowing wider range functionality such as dark trapping blue-detuned generation multiple, distinct waveguides from single FZPs. Our experiment utilises Bose-Einstein...
Most efforts in space-based global quantum communications focus on trusted networks. Here we analyse use of space-borne memories and show that it provides much faster entanglement distribution rates than the existing hybrid architectures.