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Singularity of Lévy walks in the lifted Pomeau-Manneville map.
Chaos
January 2025
Centre for Complex Systems, School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom.
Since groundbreaking works in the 1980s it is well-known that simple deterministic dynamical systems can display intermittent dynamics and weak chaos leading to anomalous diffusion. A paradigmatic example is the Pomeau-Manneville (PM) map which, suitably lifted onto the whole real line, was shown to generate superdiffusion that can be reproduced by stochastic Lévy walks (LWs). Here, we report that this matching only holds for parameter values of the PM map that are of Lebesgue measure zero in its two-dimensional parameter space.
View Article and Find Full Text PDFCircumventing the Metastable States within DFT+ through Random Orbital-Dependent Local Perturbation.
J Chem Theory Comput
January 2025
Institute of Materials, China Academy of Engineering Physics, Mianyang, Sichuan 621907, China.
Hubbard-corrected density-functional theory (DFT+) is widely employed to predict the physical properties of correlated materials; however, reliable predictions can be hindered by the presence of metastable solutions in the DFT+ calculations. This issue stems from the orbital physics inherent in DFT+. To address this, we propose a method to circumvent metastable states by applying a random orbital-dependent local perturbation to the localized orbitals.
View Article and Find Full Text PDFVersatile adhesive skin enhances robotic interactions with the environment.
Sci Adv
January 2025
School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore.
Electronic skins endow robots with sensory functions but often lack the multifunctionality of natural skin, such as switchable adhesion. Current smart adhesives based on elastomers have limited adhesion tunability, which hinders their effective use for both carrying heavy loads and performing dexterous manipulations. Here, we report a versatile, one-size-fits-all robotic adhesive skin using shape memory polymers with tunable rubber-to-glass phase transitions.
View Article and Find Full Text PDFGlutathione-Driven Disassembly of Planar Organic Phototherapeutic Agents to Enhance Photodynamic-Photothermal Therapy Performance for Nasopharyngeal Carcinoma.
Small
January 2025
The Department of Medical Imaging, The Affiliated Guangdong Second Provincial General Hospital of Jinan University, Xingangzhong Road 466, Guangzhou, 518037, P. R. China.
The self-assembly of hydrophobic organic phototherapeutic agents (OPTAs) with expansive planar structures into nanoparticles (NPs) represents a pivotal strategy to bolster their biocompatibility. However, the tight molecular packing within these NPs significantly influences the generation of reactive oxygen species (ROS) and the photothermal conversion efficiency (PCE), posing a substantial hurdle to elevating the efficacy of photodynamic therapy (PDT) and photothermal therapy (PTT) for such NPs. In this article, three OPTAs by donor engineering are synthesized.
View Article and Find Full Text PDFNon-Abelian lattice gauge fields in photonic synthetic frequency dimensions.
Nature
January 2025
Edward L. Ginzton Laboratory, Stanford University, Stanford, CA, USA.
Article Synopsis
- Non-Abelian gauge fields play a crucial role in explaining spin-related phenomena across various fields of physics, and lattice models help in exploring their applications.
- Researchers successfully demonstrated SU(2) lattice gauge fields for photons in synthetic frequency dimensions, marking a significant advancement since this had not been previously achieved.
- The study reveals the properties of these lattice gauge fields, such as Dirac cones and their implications for topological physics, which could enhance photonic technologies by controlling photon spins in innovative ways.
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