• An exact model for enhancing/suppressing primordial fluctuations 

  Domènech, Guillem; Vargas, Gerson; Vargas, Teófilo (London : IOP, 2024)

  Enhancements of primordial curvature fluctuations in single field inflation often involve departures from attractor trajectories in the phase space. We study enhancement/suppression of primordial fluctuations in one of the ...
• Modeling trends and periodic components in geodetic time series: a unified approach 

  Kermarrec, Gaël; Maddanu, Federico; Klos, Anna; Proietti, Tommaso; Bogusz, Janusz (Berlin ; Heidelberg : Springer, 2024)

  Geodetic time series are usually modeled with a deterministic approach that includes trend, annual, and semiannual periodic components having constant amplitude and phase-lag. Although simple, this approach neglects the ...
• Numerical Modeling and Open-Source Implementation of Variational Partition-of-Unity Localizations of Space-Time Dual-Weighted Residual Estimators for Parabolic Problems 

  Thiele, J.P.; Wick, T. (New York, NY [u.a.] : Springer Science + Business Media B.V., 2024)

  In this work, we consider space-time goal-oriented a posteriori error estimation for parabolic problems. Temporal and spatial discretizations are based on Galerkin finite elements of continuous and discontinuous type. The ...
• Error bounds for Lie group representations in quantum mechanics 

  van Luijk, Lauritz; Galke, Niklas; Hahn, Alexander; Burgarth, Daniel (Bristol : IOP Publ., 2024)

  We provide state-dependent error bounds for strongly continuous unitary representations of connected Lie groups. That is, we bound the difference of two unitaries applied to a state in terms of the energy with respect to ...
• A monolithic space–time temporal multirate finite element framework for interface and volume coupled problems 

  Roth, Julian; Soszyńska, Martyna; Richter, Thomas; Wick, Thomas (Amsterdam [u.a.] : North-Holland, 2024)

  In this work, we propose and computationally investigate a monolithic space–time multirate scheme for coupled problems. The novelty lies in the monolithic formulation of the multirate approach as this requires a careful ...
• LISA Galactic Binaries with Astrometry from Gaia DR3 

  Kupfer, Thomas; Korol, Valeriya; Littenberg, Tyson B.; Shah, Sweta; Savalle, Etienne; Groot, Paul J.; Marsh, Thomas R.; Le Jeune, Maude; Nelemans, Gijs; Pala, Anna F.; Petiteau, Antoine; Ramsay, Gavin; Steeghs, Danny; Babak, Stanislav (London : Institute of Physics Publ., 2024)

  Galactic compact binaries with orbital periods shorter than a few hours emit detectable gravitational waves (GWs) at low frequencies. Their GW signals can be detected with the future Laser Interferometer Space Antenna ...
• The Covariance Metric in the Blaschke Locus 

  Dai, Xian; Eptaminitakis, Nikolas (New York, NY : Springer, 2024)

  We prove that the Blaschke locus has the structure of a finite dimensional smooth manifold away from the Teichmüller space and study its Riemannian manifold structure with respect to the covariance metric introduced by ...
• Ultraviolet supercontinuum generation using a differentially-pumped integrated glass chip 

  Wanie, Vincent; Barbato, Pasquale; Hahne, Josina; Ryabchuk, Sergey; Wahid, Ammar Bin; Amorim, David; Månsson, Erik P.; Trabattoni, Andrea; Osellame, Roberto; Martínez Vázquez, Rebeca; Calegari, Francesca (Bristol : IOP Publishing, 2024)

  We investigate the generation of ultrabroadband femtosecond ultraviolet (UV) radiation via third-order harmonic generation in highly confined gas media. A dual-stage differential-pumping scheme integrated into a glass ...
• Convolutional neural network for retrieval of the time-dependent bond length in a molecule from photoelectron momentum distributions 

  Shvetsov-Shilovski, N.I.; Lein, M. (Bristol : IOP Publ., 2024)

  We apply deep learning for retrieval of the time-dependent bond length in the dissociating two-dimensional H+2 molecule using photoelectron momentum distributions. We consider a pump-probe scheme and calculate electron ...
• Exploring the fundamental limits of integrated beam splitters with arbitrary phase via topology optimization 

  Nanda, Abhishek; Kues, Michael; Calà Lesina, Antonio (Washington, DC : Soc., 2024)

  Optical beam splitters are essential for classical and quantum photonic on-chip systems. In integrated optical technology, a beam splitter can be implemented as a beam coupler with two input and two output ports. The output ...
• Branching Exponents of Synthetic Vascular Trees under Different Optimality Principles 

  Jessen, Etienne; Steinbach, Marc C.; Debbaut, Charlotte; Schillinger, Dominik (New York, NY : IEEE, 2023)

  Objective: The branching behavior of vascular trees is often characterized using Murray's law. We investigate its validity using synthetic vascular trees generated under global optimization criteria. Methods: Our synthetic ...
• Metallic nanostructures as electronic billiards for nonlinear terahertz photonics 

  Babushkin, Ihar; Shi, Liping; Demircan, Ayhan; Morgner, Uwe; Herrmann, Joachim; Husakou, Anton (College Park, MD : APS, 2023)

  The optical properties of metallic nanoparticles are most often considered in terms of plasmons, the coupled states of light and quasifree electrons. Confinement of electrons inside the nanostructure leads to another, very ...
• Self-bound crystals of antiparallel dipolar mixtures 

  Arazo, Maria; Gallemí, Albert; Guilleumas, Montserrat; Mayol, Ricardo; Santos, Luis (College Park, MD : APS, 2023)

  Recent experiments have created supersolids of dipolar quantum droplets. The resulting crystals lack, however, a genuine cohesive energy and are maintained by the presence of an external confinement, bearing a resemblance ...
• Non-equilibrium dynamics of dipolar polarons 

  Volosniev, Artem G.; Bighin, Giacomo; Santos, Luis; Peña Ardila, Luisllu A. (Amsterdam : SciPost Foundation, 2023)

  We study the out-of-equilibrium quantum dynamics of dipolar polarons, i.e., impurities immersed in a dipolar Bose-Einstein condensate, after a quench of the impurity-boson interaction. We show that the dipolar nature of ...
• Long-Persistent Photoconductivity in Transistor Structures Made from Thin ZrS3-Films 

  Thole, Lars; Ben Kalefa, Asem; Belke, Christopher; Locmelis, Sonja; Bockhorn, Lina; Behrens, Peter; Haug, Rolf J. (Washington, DC : ACS Publications, 2023)

  In the search for two-dimensional (2D) materials, transition-metal trichalcogenides (TMTCs) have emerged as promising candidates for optoelectronic applications. Here, we show a very long-lasting persistent photoconductivity ...
• How to build an optical filter with an atomic vapor cell 

  Uhland, Denis; Dillmann, Helena; Wang, Yijun; Gerhardt, Ilja ([Bad Honnef] : Dt. Physikalische Ges., 2023)

  The nature of atomic vapors, their natural alignment with interatomic transitions, and their ease of use make them highly suited for spectrally narrow-banded optical filters. Atomic filters come in two flavors: a filter ...
• Tunable in situ near-UV pulses by transient plasmonic resonance in nanocomposites 

  Husakou, Anton; Babushkin, Ihar; Fedotova, Olga; Rusetsky, Ryhor; Smirnova, Tatsiana; Khasanov, Oleg; Fedotov, Alexander; Sapaev, Usman; Apostolova, Tzveta (Washington, DC : Optica, 2023)

  We propose a concept for generation of ultrashort pulses based on transient field-induced plasmonic resonance in nanoparticle composites. Photoionization and free-carrier plasma generation change the susceptibility of ...
• Numerical studies of different mixed phase-field fracture models for simulating crack propagation in punctured EPDM strips 

  Mang, K.; Wick, T. (Barcelona, Spain : International Centre for Numerical Methods in Engineering (CIMNE), 2021)

  We consider a monolithic phase-field description for fractures in nearly incompressible materials, i.e., carbon black filled ethylene propylene diene monomer rubber (EPDM). A quasi-static phase-field fracture problem is ...
• Clock transitions versus Bragg diffraction in atom-interferometric dark-matter detection 

  Derr, Daniel; Giese, Enno ([Melville, NY] : AIP Publishing, 2023)

  Atom interferometers with long baselines are envisioned to complement the ongoing search for dark matter. They rely on atomic manipulation based on internal (clock) transitions or state-preserving atomic diffraction. ...
• Lasing Effect in Symmetrical van der Waals Heterostructured Metasurfaces Due to Lattice-Induced Multipole Coupling 

  Prokhorov, Alexei V.; Gubin, Mikhail Yu.; Shesterikov, Alexander V.; Arsenin, Aleksey V.; Volkov, Valentyn S.; Evlyukhin, Andrey B. (Washington, DC : ACS Publ., 2023)

  New practical ways to reach the lasing effect in symmetrical metasurfaces have been developed and theoretically demonstrated. Our approach is based on excitation of the resonance of an octupole quasi-trapped mode (OQTM) ...

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