Article
Engineering, Marine
Yunfei Mao, Mingfu Guan
Summary: In this paper, the relationship between landslide properties and induced tsunami wave characteristics as well as the energy transfer between the landslide and waves was systematically investigated. A meshless smoothed particle hydrodynamics (SPH) framework was developed and validated for reproducing the complex processes of landslide-induced tsunami wave generation. Numerical simulations were conducted to study the effects of landslide deformability, relative initial positions, densities, landslide size, and downstream water depths on the maximum wave height. The results provide valuable insights into the understanding of landslide-induced tsunami waves and contribute to risk assessment and mitigation efforts.
Article
Chemistry, Physical
Livia B. Partay, Gyoergy Hantal
Summary: This study computed the pressure-temperature phase diagram of the hard-core two-scale ramp potential in two dimensions, revealing the sensitivity of phases stability through parameterization and model modifications. It identified thermodynamically relevant phases and proposed a smooth version of the potential that reproduces density anomaly and forms a dodecahedral quasi-crystal structure.
Article
Materials Science, Multidisciplinary
D. Garaev, D. Yu Sergeeva, A. A. Tishchenko
Summary: This study establishes the first-principles theory for the scattering of a fast electron in an array of nano- or microparticles, revealing complex diffraction patterns generated by Smith-Purcell radiation at THz frequencies. The derived generalized Smith-Purcell dispersion relation provides insights into the relationship between frequency, structure periods, electron velocity, and radiation angle. The unique spatial distribution of generated light could potentially be used for structured-light electron-driven photon sources.
Article
Engineering, Ocean
Ranjodh Rai, Zhihua Ma, Zaibin Lin, Wei Bai, Ling Qian
Summary: This paper presents a stable method for solving the kinematic boundary condition equation in fully nonlinear potential flow models. The method is motivated by a total variation diminishing approach and is applicable to advection-dominated partial differential equations. It is simple, easily implemented, and produces accurate numerical solutions that agree well with experimental and analytical results.
APPLIED OCEAN RESEARCH
(2023)
Article
Optics
Wenjun Zhang, Yuquan Zhang, Shuoshuo Zhang, Yulong Wang, Wu Yang, Changjun Min, Xiaocong Yuan
Summary: By controlling the geometric parameters of micro- and nano-structures and using pulsed lasers with high peak power, optical forces and potential wells in surface plasmon optical tweezers based on gold bowtie structures can be dynamically modulated, offering a new approach for stable trapping and dynamic control of particles.
Article
Physics, Fluids & Plasmas
Naftali R. Smith, Pierre Le Doussal, Satya N. Majumdar, Gregory Schehr
Summary: A first-principles approach was developed to compute the counting statistics of N noninteracting spinless fermions in the ground state in arbitrary dimensions. The variance of N-D was shown to grow as N(d-1)/d for large N, with explicit dependence on the potential and size of D. Conjectures were made for similar asymptotics in entanglement entropy in any dimension.
Article
Physics, Multidisciplinary
David S. Dean, Pierre Le Doussal, Satya N. Majumdar, Gregory Schehr
Summary: The study focuses on the properties of spin-less non-interacting fermions trapped in a one-dimensional confining potential with one or more impurities modeled by delta function potentials. The method based on the single particle Green's function is employed to calculate the effects of impurities on the Fermi gas density and the effective potential. Results show interesting transitions and modifications in the density and potential when impurities are placed at different locations, such as near the edge of the trap or in the bulk.
Article
Chemistry, Multidisciplinary
Anastasia Karakozova, Sergey Kuznetsov
Summary: Exciting a harmonic wave in a one-dimensional rod with the Mooney-Rivlin equation of state reveals the formation and propagation of shock wave fronts between faster and slower moving parts. The observed shock wave fronts result in the absorbed collapse of slower moving parts by faster parts, leading to attenuation of kinetic and elastic strain energy.
APPLIED SCIENCES-BASEL
(2023)
Article
Physics, Multidisciplinary
Blaise P. Edouma Biloa, Conrad B. Tabi, Henri P. Ekobena Fouda, Timoleon Kofane
Summary: This paper addresses the existence of modulated nonlinear periodic wave trains in a system of self-propelled particles. The mathematical model used in the study is reduced to a one-dimensional complex Ginzburg-Landau equation. The modulational instability phenomenon and solutions for the model equations are analyzed and discussed.
Article
Meteorology & Atmospheric Sciences
Suma Debsarma, Sabyasachi Chakrabortty, James T. Kirby
Summary: A new mathematical model is proposed to study internal wave propagation in a two-layer fluid domain with a free surface and finite depth in the lower layer. The model consists of three coupled nonlinear equations for the interface displacement and velocity potentials of the two layers. Numerical simulations are conducted to obtain profiles of internal solitary waves and free surface waves for different conditions. The results show good agreement with recent experimental observations and highlight the differences between the free surface model and rigid-lid two-layer fluid models.
Article
Mathematics
Dmitry Makarov
Summary: The coupled quantum harmonic oscillator, an important model system in quantum optics and quantum informatics, has been widely studied for quantum entanglement. This research demonstrates that the system of coupled harmonic oscillators interacting with two independent particles has an exact analytical solution to the dynamic Schrodinger equation, revealing the main parameters of the system.
Article
Physics, Multidisciplinary
G. Gouraud, P. Le Doussal, G. Schehr
Summary: The study focuses on the hole probability of N noninteracting fermions, obtaining a universal scaling function and a super-exponential tail for the probability P(R) of a sphere region. The results are in good agreement with existing numerical simulations. At the order of the radius of the Fermi gas, the hole probability is described by a large deviation form.
Article
Materials Science, Multidisciplinary
Hongmin Gao, Frank Schlawin, Dieter Jaksch
Summary: The coupling between a 2D Bardeen-Cooper-Schrieffer superconductor and an externally driven cavity alters the low-lying excitations and increases the superconducting gap. The driven-cavity-induced long-range attraction changes the collective excitations of the superconductor, leading to the appearance of additional excitonic modes and enhancing the lifetime of the Higgs mode.
Article
Chemistry, Multidisciplinary
Lina Jaya Diguna, Silmi Kaffah, Muhammad Haris Mahyuddin, Arramel, Francesco Maddalena, Suriani Abu Bakar, Mimin Aminah, Djulia Onggo, Marcin Eugeniusz Witkowski, Michal Makowski, Winicjusz Drozdowski, Muhammad Danang Birowosuto
Summary: The optical and scintillation properties of (C6H5CH2NH3)(2)SnBr4 were reported, showing excellent absorption length and measured bandgap. Despite thermal quenching, this green light-emitting perovskite opens up possibilities for new lead-free scintillating materials.
Article
Mathematics, Applied
P. Jamet, A. Drezet
Summary: This study extends a recent classical mechanical analog of Bohr's atom, which involves a scalar field and a massive point-like particle, by examining the influence of a uniform weak magnetic field on the system dynamics. The results show that within the constraints of the model, the Zeeman effect can be reproduced in agreement with semiclassical theory.
Article
Chemistry, Multidisciplinary
Fei Xiang, Xuhong Zhao, Jian Yang, Ning Li, Wenxiao Gong, Yizhen Liu, Arturo Burguete-Lopez, Yulan Li, Xiaobin Niu, Andrea Fratalocchi
Summary: Researchers have developed a large-scale H2O2 electrocatalyst based on metal-free carbon fibers doped with fluorine and sulfur. This catalyst exhibits excellent performance, including high onset potential and almost ideal 2e(-) pathway selectivity, surpassing most carbon-based or metal-based electrocatalysts reported so far. The enhanced performance is attributed to intermolecular charge transfer and electron spin redistribution facilitated by fluorine and sulfur dual-doping.
ADVANCED MATERIALS
(2023)
Article
Optics
Stefano Trillo, Fabio Baronio
Summary: This article investigates the recurrent regime of depleted two-color modulational instability in second-harmonic generation in the cascading limit. A description based on simple algebraic formulas is validated, establishing the quantitative limit of validity for this approach. In the low mismatch regime, where this description breaks down, the system undergoes pseudo-stochastic alterations between two types of deterministic recurrence.
Article
Materials Science, Multidisciplinary
Martina Marcotulli, Maria Celeste Tirelli, Marina Volpi, Jakub Jaroszewicz, Chiara Scognamiglio, Piotr Kasprzycki, Karol Karnowski, Wojciech Swieszkowski, Giancarlo Ruocco, Marco Costantini, Gianluca Cidonio, Andrea Barbetta
Summary: 3D printing systems have evolved greatly in the last decade, becoming a top technology for academic and industrial applications. However, manufacturing polymeric materials with trabecular porosity and functionally graded architecture through additive platforms remains a technical challenge. This study presents a 3D extrusion printing strategy that enables the construction of high-accuracy polymeric foams with varying density and composition.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Physics, Multidisciplinary
Claudio Conti
Summary: Nonlocal quantum fluids play important roles in dark-matter models, quantum simulations, and technologies. This study explores the dynamics of 3D+1 solitons in the second-quantized nonlocal nonlinear Schrodinger-Newton equation, and theoretically investigates the quantum diffusion of soliton parameters. The numerical simulations validate the theoretical analysis and reveal the onset of non-Gaussian statistics, which have potential implications for quantum computing.
NEW JOURNAL OF PHYSICS
(2023)
Article
Optics
Lili Bu, Shihua Chen, Fabio Baronio, Stefano Trillo
Summary: We systematically investigate the resonant radiation emitted by soliton-like wave-packets supported by second-harmonic generation in the cascading regime. A general mechanism is emphasized to explain the growth of resonant radiation without higher-order dispersion, driven by the second-harmonic component. This mechanism sheds radiation around the fundamental-frequency component through parametric down-conversion processes. The study provides explicit understanding of the mechanism of soliton radiation in quadratic nonlinear media.
Article
Optics
Laura Pilozzi, Mauro Missori, Claudio Conti
Summary: In this study, the transition from Fano resonances to Bound states in the continuum (BIC) in a one-dimensional photonic crystal slab made of rectangular dielectric rods was investigated at terahertz frequencies. Symmetry-protected, high-Q BIC were found at normal incidence through simulations based on an analytical exact solution of the Maxwell equations. For non-normal incidence, BIC coupled with freely propagating waves and appeared as Fano resonances in the scattering field. The simulations were validated by 3D-printing the photonic crystal slab and comparing THz time-domain spectroscopy measurements.
Article
Multidisciplinary Sciences
Davide Pierangeli, Claudio Conti
Summary: The authors present a method for single shot polarimetry of vector beams without using polarization optics. They use light scattering to map the polarization content of the beam into a spatial intensity distribution and utilize supervised learning for single-shot measurements of multiple polarizations. This method enables accurate characterization of structured light encoding multiple polarizations and has the potential to impact optical devices for sensing, imaging, and computing.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Davide Pierangeli, Giordano Perini, Valentina Palmieri, Ivana Grecco, Ginevra Friggeri, Marco De Spirito, Massimiliano Papi, Eugenio DelRe, Claudio Conti
Summary: The authors discovered that tumor-cell spheroids exhibit optical rogue waves under randomly modulated laser beam illumination. The intensity of transmitted light follows a Weibull statistical distribution, with extreme events corresponding to localized optical modes propagating within the cell network. These nonlinear optical filaments form high-transmission channels and can be used to achieve controlled temperature increase. This study sheds light on optical propagation in biological aggregates and demonstrates the potential of using rogue waves in biomedical applications.
NATURE COMMUNICATIONS
(2023)
Article
Optics
Riccardo Falcone, Claudio Conti
Summary: In this study, we investigate the detection of Unruh radiation using ionized hydrogenlike atoms accelerated by an external electric field. We find that the first-quantized description for hydrogenlike atoms is not always applicable due to the frame-dependent definition of particles. However, we show that this frame-dependent effect can be suppressed by constraining the atomic ionization and the electric field. Additionally, we identify the physical regimes where atomic excitation probability exists due to the Unruh electromagnetic background, and determine the observational limits for the Unruh effect using first-quantized atomic detectors.
Article
Astronomy & Astrophysics
Riccardo Falcone, Claudio Conti
Summary: This article presents the representation of the Minkowski vacuum as an element of the Rindler-Fock space for a free Dirac field in flat spacetime. The statistical operator obtained by tracing away the left wedge is computed, and the resulting thermal state for fermionic particles is described.
Article
Astronomy & Astrophysics
Riccardo Falcone, Claudio Conti
Summary: From first principles, we derive the nonrelativistic limit of scalar and Dirac fields in curved spacetime. Our aim is to find general relativistic corrections to the quantum theory of particles affected by Newtonian gravity, which is currently experimentally accessible. By rigorously determining these corrections through the nonrelativistic limit of fully relativistic quantum theories in curved spacetime, we show how a noninertial observer can distinguish between a scalar field and a Dirac field in curved static spacetimes. For sufficiently large acceleration, the gravity-spin coupling dominates over the corrections for scalar fields, making Dirac particles the best candidates for observing non-Newtonian gravity in quantum particle phenomenology.
Article
Optics
Riccardo Falcone, Claudio Conti
Summary: We demonstrate that Minkowski single-particle states located beyond the horizon can alter the Unruh thermal distribution in an accelerated frame, thus allowing accelerated observers to detect particles emitted beyond the horizon contrary to classical predictions. Our approach is based on deriving the explicit Wigner characteristic function for the complete description of the quantum field in the noninertial frame, and it can be extended to general states.
Article
Biochemical Research Methods
Riccardo Reale, Giovanna Peruzzi, Maryamsadat Ghoreishi, Helena Stabile, Giancarlo Ruocco, Marco Leonetti
Summary: This article introduces a microfluidic scanning flow cytometer (mu SFC) that can achieve accurate angle-resolved scattering measurements within a standard polydimethylsiloxane microfluidic chip. In contrast to conventional flow cytometers and fluorescence activated cell sorters, the mu SFC yields linearly correlated size estimates and quantitative refractive index estimates for particles, making it suitable for characterizing biological samples and potentially applicable in diagnostic settings.
Article
Optics
Maksim Makarenko, Qizhou Wang, Arturo Burguete-Lopez, Andrea Fratalocchi
Summary: Photonic accelerators are rapidly advancing in the field of Artificial Intelligence (AI), offering revolutionary computational speed. By leveraging the high bandwidth of photons, photonic accelerators meet the computational demands of AI tasks and play a crucial role in applications such as classification, segmentation, and feature extraction.
Article
Multidisciplinary Sciences
N. Shashaank, Mahalakshmi Somayaji, Mattia Miotto, Eugene V. Mosharov, Emily A. Makowicz, David A. Knowles, Giancarlo Ruocco, David L. Sulzer
Summary: Dopamine neurotransmission in the striatum plays a crucial role in normal and disease functions. This study utilizes computational models to analyze fast-scan cyclic voltammetry recordings in mice and provides insight into the modulation of dopamine release and reuptake. The findings support previous research and reveal the involvement of synuclein proteins in dopamine neurotransmission.
