• Coherent photo-thermal noise cancellation in a dual-wavelength optical cavity for narrow-linewidth laser frequency stabilisation 

  Dawel, Fabian; Wilzewski, Alexander; Herbers, Sofia; Pelzer, Lennart; Kramer, Johannes; Hild, Marek B.; Dietze, Kai; Krinner, Ludwig; Spethmann, Nicolas C. H.; Schmidt, Piet O. (Washington, DC : Optica, 2024)

  Optical resonators are used for the realisation of ultra-stable frequency lasers. The use of high reflectivity multi-band coatings allows the frequency locking of several lasers of different wavelengths to a single cavity. ...
• The Mullins–Sekerka problem via the method of potentials 

  Escher, Joachim; Matioc, Anca‐Voichita; Matioc, Bogdan‐Vasile (Weinheim : Wiley-VCH, 2024)

  It is shown that the two-dimensional Mullins–Sekerka problem is well-posed in all subcritical Sobolev spaces Hr (R) with r ϵ (3/2,2). This is the first result, where this issue is established in an unbounded geometry. The ...
• Single-Photon Level Dispersive Fourier Transform: Ultrasensitive Characterization of Noise-Driven Nonlinear Dynamics 

  Sader, Lynn; Bose, Surajit; Kashi, Anahita Khodadad; Boussafa, Yassin; Haldar, Raktim; Dauliat, Romain; Roy, Philippe; Fabert, Marc; Tonello, Alessandro; Couderc, Vincent; Kues, Michael; Wetzel, Benjamin (Washington, DC : ACS, 2023)

  Dispersive Fourier transform is a characterization technique that allows directly extracting an optical spectrum from a time domain signal, thus providing access to real-time characterization of the signal spectrum. However, ...
• Large-scale spatiotemporal calculation of photovoltaic capacity factors using ray tracing: A case study in urban environments 

  Bredemeier, Dennis; Schinke, Carsten; Niepelt, Raphael; Brendel, Rolf (Chichester : Wiley, 2023)

  Photovoltaics (PVs) on building facades, either building-integrated or building-attached, offer a large energy yield potential especially in densely populated urban areas. Targeting this potential requires the availability ...
• Nicolai maps with four-fermion interactions 

  Casarin, Lorenzo; Lechtenfeld, Olaf; Rupprecht, Maximilian (Berlin ; Heidelberg : Springer, 2023)

  Nicolai maps offer an alternative description of supersymmetric theories via nonlinear and nonlocal transformations characterized by the so-called ‘free-action’ and ‘determinant-matching’ conditions. The latter expresses ...
• Penning micro-trap for quantum computing 

  Jain, Shreyans; Sägesser, Tobias; Hrmo, Pavel; Torkzaban, Celeste; Stadler, Martin; Oswald, Robin; Axline, Chris; Bautista-Salvador, Amado; Ospelkaus, Christian; Kienzler, Daniel; Home, Jonathan (London [u.a.] : Nature Publ. Group, 2024)

  Trapped ions in radio-frequency traps are among the leading approaches for realizing quantum computers, because of high-fidelity quantum gates and long coherence times1–3. However, the use of radio-frequencies presents ...
• A Casimir operator for a Calogero W algebra 

  Correa, Francisco; Leal, Gonzalo; Lechtenfeld, Olaf; Marquette, Ian (Bristol : IOP Publ., 2024)

  We investigate the nonlinear algebra W 3 generated by the 9 functionally independent permutation-symmetric operators in the three-particle rational quantum Calogero model. Decoupling the center of mass, we pass to a smaller ...
• 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 ...

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