Jülich Aachen Research Alliance

Optically Active Single Hole Spin in ZnSe

Abstract Semiconductor hole spins offer a pathway to extended coherence times by decoupling from nuclear magnetic noise, while their spin–orbit coupling enables fast all-electrical control. In ZnSe, however, realizing this potential has been limited by p-doping challenges. Here,...

Raman Spectroscopy of Laser-Micro-Annealing-Induced Structural Changes in Ti-6Al-4V

This short study presents the results of micro-Raman investigations performed on the alloy Ti-6Al-4V, which was additively manufactured via metal fused filament fabrication (MF3). Local laser micro-annealing was applied at different power intensities to distinct regions. The appl...

Understanding and Designing Phase Change Materials: Insights From Atom Probe Tomography

Phase Change Materials (PCMs) can be rapidly and reversibly switched between their amorphous and crystalline state; a transition that is accompanied by a pronounced change of optoelectronic properties. Here, progress is reviewed to explain these property changes, focusing on adva...

Performance of the spin qubit shuttling architecture for a surface code implementation

Qubit shuttling promises to advance some quantum computing platforms to the qubit register sizes needed for effective quantum error correction (QEC), but also introduces additional errors whose impact must be evaluated. The established method to investigate the performance of QEC...

Annual Research Review: Sex differences in conduct disorder – revisiting existing evidence and exploring future directions

Conduct disorder (CD) is a common psychiatric disorder in youth, characterized by severe and recurrent aggressive and antisocial behaviors and associated with substantial healthcare and societal costs. Rates of CD increase during adolescence in both sexes, with the male‐to‐female...

Operational Degradation of Flooded Lead–Acid Storage Under Frequency Containment Reserve: Long-Term Evidence from a Hybrid Multi-Technology BESS

Flooded lead–acid batteries continue to operate in utility-scale battery energy storage systems (BESSs), yet their long-term degradation under grid-frequency regulation remains poorly characterized by field evidence. This paper presents an eight-year, multi-indicator degradation...

Quantitative nondiagonal phase field modeling of pearlite growth involving multi-diffusion paths

Despite extensive research on pearlite formation, the rate-controlling mechanisms of pearlite growth remain under debate. Phase field modeling has become a key tool for investigating such transformations; however, in solid-state systems where diffusion occurs both within individu...

Robust design of multi-energy systems accounting for mixed-integer operational problems

Identifying robust designs for multi-energy systems is computationally challenging. As rigorous approaches are often computationally intractable, heuristics are employed to generate candidate designs. Specifically, we consider a heuristic that iteratively identifies and adds extr...

DifferentiableThermodynamic Phase-Equilibria forMachine Learning

Abstract Accurate prediction of phase equilibria remains a central challenge in chemical engineering. Physics-consistent machine learning methods that incorporate thermodynamic structure into neural networks have recently shown strong performance for activity-coefficient modeling...

A quality measure for repeating multiple-unit spike patterns

We propose a quality measure for spatio-temporal spike patterns (STPs) in multiple-neuron recordings. In such recordings, repeating STPs or pattern repetitions (PRs) are often found, with many of these generated by chance. To rule those out, statistical tests have been developed...