Publications (24)
Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles
Alexander Roth, Klemens Hammerer, Kirill S. Tikhonov
Spin-polarised atomic ensembles probed by light based on the Faraday interaction are a versatile platform for numerous applications in quantum metrology and quantum information pro…
An advanced reliability reserve incentivizes flexibility investments while safeguarding the electricity market
Franziska Klaucke, Karsten Neuhoff, Alexander Roth +2
To ensure security of supply in the power sector, many countries are already using or discussing the introduction of capacity mechanisms. Two main types of such mechanisms include…
Synchronization of Active Atomic Clocks via Quantum and Classical Channels
Alexander Roth, Klemens Hammerer
Superradiant lasers based on atomic ensembles exhibiting ultra-narrow optical transitions can emit light of unprecedented spectral purity and may serve as active atomic clocks. We…
Modeling Variability in Template-based Code Generators for Product Line Engineering
Timo Greifenberg, Klaus Müller, Alexander Roth +3
Generating software from abstract models is a prime activity in model-drivenengineering. Adaptable and extendable code generators are important to address changing technologies as…
A Comparison of Mechanisms for Integrating Handwritten and Generated Code for Object-Oriented Programming Languages
Timo Greifenberg, Katrin Hölldobler, Carsten Kolassa +10
Code generation from models is a core activity in model-driven development (MDD). For complex systems it is usually impossible to generate the entire software system from models al…
DIETERpy: a Python framework for The Dispatch and Investment Evaluation Tool with Endogenous Renewables
Carlos Gaete-Morales, Martin Kittel, Alexander Roth +1
DIETER is an open-source power sector model designed to analyze future settings with very high shares of variable renewable energy sources. It minimizes overall system costs, inclu…
An Extended Symbol Table Infrastructure to Manage the Composition of Output-Specific Generator Information
Pedram Mir Seyed Nazari, Alexander Roth, Bernhard Rumpe
Code generation is regarded as an essential part of model-driven development (MDD) to systematically transform the abstract models to concrete code. One current challenges of templ…
A mix of long-duration hydrogen and thermal storage enables large-scale electrified heating in a renewable European energy system
Felix Schmidt, Alexander Roth, Wolf-Peter Schill
Hydrogen-based long-duration electricity storage (LDES) is a key component of renewable energy systems to deal with seasonality and prolonged periods of low wind and solar energy a…
Hot Jupiter Diversity and the Onset of TiO/VO Revealed by a Large Grid of Non-Grey Global Circulation Models
Alexander Roth, Vivien Parmentier, Mark Hammond
The population of hot Jupiters is extremely diverse, with large variations in their irradiation, period, gravity and chemical composition. To understand the intrinsic planet divers…
Artifacts and Errors in Cross-Spectrum Phase Noise Measurements
Yannick Gruson, Adrian Rus, Ulrich L. Rohde +2
This article deals with the erratic and inconsistent phase-noise spectra often seen in low-noise oscillators, whose floor is of the order of dBc/Hz or less. Such oscillators…
Staged Evolution with Quality Gates for Model Libraries
Alexander Roth, Andreas Ganser, Horst Lichter +1
Model evolution is widely considered as a subject under research. Despite its role in research, common purpose concepts, approaches, solutions, and methodologies are missing. Limit…
Proactive Quality Guidance for Model Evolution in Model Libraries
Andreas Ganser, Horst Lichter, Alexander Roth +1
Model evolution in model libraries differs from general model evolution. It limits the scope to the manageable and allows to develop clear concepts, approaches, solutions, and meth…
Code Generator Composition for Model-Driven Engineering of Robotics Component & Connector Systems
Jan Oliver Ringert, Alexander Roth, Bernhard Rumpe +1
Engineering software for robotics applications requires multidomain and application-specific solutions. Model-driven engineering and modeling language integration provide means for…
Long-duration electricity storage needs for coping with Dunkelflaute events in Europe
Martin Kittel, Alexander Roth, Wolf-Peter Schill
Coping with prolonged periods of low availability of wind and solar power, also referred to as variable renewable energy droughts or "Dunkelflaute", emerges as a key challenge for…
Geographical balancing of wind power decreases storage needs in a 100% renewable European power sector
Alexander Roth, Wolf-Peter Schill
To reduce greenhouse gas emissions, many countries plan to massively expand wind power and solar photovoltaic capacities. These variable renewable energy sources require additional…
Awesome SOSS: Atmospheric Characterisation of WASP-96 b using the JWST Early Release Observations
Jake Taylor, Michael Radica, Luis Welbanks +13
The newly operational JWST offers the potential to study the atmospheres of distant worlds with precision that has not been achieved before. One of the first exoplanets observed by…
Multi-disk clutch optimization using quantum annealing
John D. Malcolm, Alexander Roth, Mladjan Radic +5
In this work, we develop a new quantum algorithm to solve a combinatorial problem with significant practical relevance occurring in clutch manufacturing. It is demonstrated how qua…
Power sector benefits of flexible heat pumps
Alexander Roth, Carlos Gaete-Morales, Dana Kirchem +1
Heat pumps play a major role in decreasing fossil fuel use in heating. They increase electricity demand, but could also foster the system integration of variable renewable energy s…
Power sector impacts of a simultaneous European heat pump rollout
Alexander Roth
The decarbonization of buildings requires the phase-out of fossil fuel heating systems. Heat pumps are considered a crucial technology to supply a substantial part of heating energ…
Pseudo-2D Modelling of Heat Redistribution Through H Thermal Dissociation/Recombination: Consequences for Ultra-Hot Jupiters
Alexander Roth, Benjamin Drummond, Eric Hébrard +3
Thermal dissociation and recombination of molecular hydrogen, H_2, in the atmospheres of ultra-hot Jupiters (UHJs) has been shown to play an important role in global heat redistrib…
Constructing Arbitrary Coherent Rearrangements in Optical Lattices
Alexander Roth, Liyang Qiu, Timon Hilker +2
Coherent control of motional degrees of freedom of ultracold atoms in optical lattices offers a promising route towards programmable quantum dynamics with massive particles. We pro…
A Comparison of 1D and 3D Exoplanet Atmosphere Model Grids: ScCHIMERA and the SPARC/MITgcm
Lindsey S. Wiser, Alexander Roth, Vivien Parmentier +1
Inferring the properties of transiting exoplanet atmospheres relies on comparing models to spectroscopic observations. Atmosphere models, however, make a range of assumptions, from…
Towards Product Lining Model-Driven Development Code Generators
Alexander Roth, Bernhard Rumpe
A code generator systematically transforms compact models to detailed code. Today, code generation is regarded as an integral part of model-driven development (MDD). Despite its re…
TUnit - Unit Testing For Template-based Code Generators
Carsten Kolassa, Markus Look, Klaus Müller +3
Template-based code generator development as part of model-drivendevelopment (MDD) demands for strong mechanisms and tools that support developers to improve robustness, i.e., the…