Article
Astronomy & Astrophysics
P. C. Bruns, A. Cieply, M. Mai
Summary: This study adopts a novel formalism to analyze the low-energy gamma p -> K+ pi Sigma photoproduction reaction. The meson-baryon rescattering is found to have a significant impact on the generated spectra, and is compared with experimental data.
Article
Physics, Nuclear
V. Kukulin, V. N. Pomerantsev, O. A. Rubtsova, M. N. Platonova, I. T. Obukhovsky
Summary: This article presents the dibaryon concept for nuclear force, proposing that the attraction between nucleons at medium distances is primarily due to the s-channel exchange of an intermediate six-quark state. A microscopic six-quark description of the NN system is used to construct the NN interaction model, with symmetry aspects playing a significant role. The model successfully describes the elastic phase shifts and inelasticities of NN scattering in various partial waves and energy ranges, and the parameters of the intermediate six-quark states are consistent with known dibaryon resonances.
Article
Chemistry, Multidisciplinary
Saskia Fiedler, P. Elli Stamatopoulou, Artyom Assadillayev, Christian Wolff, Hiroshi Sugimoto, Minoru Fujii, N. Asger Mortensen, Soren Raza, Christos Tserkezis
Summary: Cathodoluminescence spectroscopy in an electron microscope is a versatile tool for analyzing the optical response of plasmonic and dielectric nanostructures. However, the transition radiation produced by electron impact is often neglected. This study demonstrates that transition radiation can generate distinct resonances that interfere constructively or destructively depending on the electron beam's time-of-flight inside the nanosphere, leading to distorted spectra and potentially erroneous modal assignment.
Article
Environmental Sciences
Tuantuan Zhang, Yi Deng, Junwen Chen, Song Yang, Peng Gao, Henian Zhang
Summary: Understanding the origin and impact of regional climate extremes is a major challenge. This study used an updated version of the CFRAM-A method to quantitatively analyze the temperature anomalies during the 2016/17 winter in China. The results showed that water vapor, atmospheric dynamics, and aerosols were the main factors contributing to the overall warming pattern, while surface albedo, clouds, solar irradiance, ozone, and carbon dioxide also played a role. Among these factors, water vapor and atmospheric dynamics had a significant impact in both northern and southeastern China, while anthropogenic aerosols were more pronounced in southeastern China.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
Rafael Ribeiro de Sousa, Alessandro Morbidelli, Rodney Gomes, Ernesto Vieira Neto, Andre Izidoro, Abreucon Atanasio Alves
Summary: The study shows that the dwarf planet Ceres may not have formed in situ like other asteroids, but instead might have been implanted from beyond Saturn. Based on simulations, Ceres-sized planetesimals captured in the asteroid belt exhibit specific distributions of semimajor axis, eccentricity, and orbital inclination.
Article
Mathematics, Interdisciplinary Applications
Can Xu, Huajian Yu, Shuguang Guan
Summary: Explosive synchronization in a system of coupled phase oscillators is easier to achieve than previously thought, as long as the adaptive fraction is nonzero. The emergence of explosive synchronization is due to an atypical scaling of the order parameter near criticality, which indicates the presence of a metastable state in the hysteresis region. This study provides profound insights into the dynamical nature of abrupt transitions induced by adaptation, a topic of continuous interest and intensive investigation.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Astronomy & Astrophysics
Matthias F. M. Lutz, Xiao-Yu Guo, Yonggoo Heo, C. L. Korpa
Summary: In this study, lattice QCD data in the open-charm sector is analyzed based on the chiral SU(3) Lagrangian. The low-energy constants are adjusted to reproduce the open-charm meson masses on lattice QCD ensembles. The effect of lefthand cuts is considered for the first time, and coupled-channel interaction terms are used. The elastic and inelastic scattering phase shifts are faithfully reproduced on ensembles with different pion masses.
Article
Physics, Nuclear
A. Martinez Torres, K. P. Khemchandani, E. Oset
Summary: We have conducted a theoretical study on the gamma d -> pi(0)eta d reaction using a realistic model for the gamma N -> pi(0)eta N reaction. We found the rescattering of the pions and the eta on a different nucleon to be an important mechanism in sharing the momentum transfer of the reaction between two nucleons. Other contributions involving the gamma N -> pi(+/-)pi N-0' process have also been considered. The dynamics of our model provide a natural explanation for the shift of the eta-d and pi(0)-d mass distributions compared to a phase space calculation.
Article
Mathematics, Interdisciplinary Applications
Bo Li, Zohreh Eskandari, Zakieh Avazzadeh
Summary: This study examines the stability and local bifurcations of a discrete-time SIR epidemic model analytically and numerically. Various bifurcations, including transcritical, flip, Neimark-Sacker, and strong resonances, are studied. The obtained analytical results are confirmed using the numerical continuation method and MATLAB toolbox, which also reveal more complex behaviors of the model.
FRACTAL AND FRACTIONAL
(2022)
Article
Optics
G. Bougas, S. I. Mistakidis, P. Giannakeas, P. Schmelcher
Summary: A scheme is proposed to dynamically excite distinct eigenstate superpositions in three-body Bose-Fermi mixtures, which can be achieved in current experiments by adjusting the scattering lengths to span from weak to strong interactions.
Article
Chemistry, Physical
R. Skoryunov, O. A. Babanova, A. Soloninin, J. B. Grinderslev, A. Skripov, T. R. Jensen
Summary: The study investigates the dynamical properties of the LiBH4•NH3 compound using nuclear magnetic resonance techniques, revealing the coexistence of four types of BH4 reorientational jump processes with different activation energies. The fastest process involves rotations around a single 3-fold symmetry axis of the BH4 tetrahedron, while slower processes are attributed to reorientations around other symmetry axes. There were no signs of diffusive Li+ jumps within the temperature range studied.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Meteorology & Atmospheric Sciences
Peiqiang Xu, Lin Wang, Ping Huang, Wen Chen
Summary: The study reveals that the relative roles of dynamics and thermodynamics in the central Europe heatwave varied over time, with thermodynamic changes favoring such events. Dynamical changes, on the other hand, acted oppositely. This fluctuation in relative contributions poses challenges in predicting heatwave behavior on a regional scale.
ATMOSPHERIC RESEARCH
(2021)
Article
Materials Science, Ceramics
Danqi Yin, Kuo-Hao Lee, Collin J. Wilkinson, Yongjian Yang, Karan Doss, John C. Mauro
Summary: Dynamical heterogeneities in glass-forming systems result in spatiotemporal fluctuations and a wide distribution of relaxation rates. This study investigates the dominant factors governing dynamical heterogeneities in borosilicate glass. Molecular dynamics simulations using the isoconfigurational ensemble method were performed to study the dynamical heterogeneities of two alkali-(alumino)borosilicate glasses. It was found that alkali ions exhibit high dynamical propensities in local spatial regions. The number of bridging oxygens for boron and silicon does not monotonically correlate with their corresponding dynamical propensities.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Engineering, Aerospace
Edoardo Legnaro, Christos Efthymiopoulos
Summary: This paper focuses on inclination-only dependent lunisolar resonances in Medium Earth Orbit (MEO), which have a significant impact on the dynamics of objects over several decades. The study presents an analytical model that accurately predicts the separatrices of lunisolar resonances based on the object's inclination, eccentricity, and semi-major axis. It also discusses how the model can explain the structures observed in Fast Lyapunov Indicator (FLI) cartography and explores the role played by certain resonances in generating chaotic motion. The results of this research provide valuable insights for designing cost-effective satellite deployment and space debris mitigation strategies.
ADVANCES IN SPACE RESEARCH
(2023)
Article
Astronomy & Astrophysics
Jessie Hirtenstein, Tucker Jones, Ryan L. Sanders, Crystal L. Martin, M. C. Cooper, Gabriel Brammer, Tommaso Treu, Kasper Schmidt, Alice Shapley
Summary: Spatially resolved spectroscopy of 15 galaxies at z similar to 0.8 from the DEEP2 survey reveals that emission is mainly dominated by star-forming H ii regions, with weak evidence of DIG emission and no significant evidence of AGN. The study suggests that photoionization modeling with stellar population synthesis inputs is a valuable tool for exploring specific star formation properties that may cause observed BPT offsets.
ASTROPHYSICAL JOURNAL
(2021)
Article
Physics, Multidisciplinary
Tobias Grass, Bruno Julia-Diaz, Niccolo Baldelli, Utso Bhattacharya, Maciej Lewenstein
PHYSICAL REVIEW LETTERS
(2020)
Article
Physics, Multidisciplinary
Ivan Morera, Grigori E. Astrakharchik, Artur Polls, Bruno Julia-Diaz
Summary: This study investigates the ground-state properties of two-component bosonic mixtures in a one-dimensional optical lattice, revealing the formation of a quantum liquid and the fermionization of dimers under certain conditions. By deriving an effective model of composite bosons and validating it against exact results, the research sheds light on the nature and stability of the quantum liquid formation.
PHYSICAL REVIEW LETTERS
(2021)
Article
Optics
Albert Escriva, Andrea Richaud, Bruno Julia-Diaz, Montserrat Guilleumas
Summary: The study investigates the ground state properties and low-lying energy spectrum of two linearly coupled Bose-Hubbard rings, revealing the emergence of various states and physical phenomena dependent on the filling of atoms. Additionally, it is shown that the two stacked rings are always entangled for an odd number of atoms.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Pere Mujal, Alex Martinez Miguel, Artur Polls, Bruno Julia-Diaz, Sebastiano Pilati
Summary: In this study, supervised machine learning of few interacting bosons in optical speckle disorder was conducted via artificial neural networks, revealing an approximately universal power-law scaling in the learning curve. A network architecture was introduced to train and test on heterogeneous datasets, providing accurate predictions for different system sizes and allowing extrapolations to larger sizes. Notably, a novel transfer-learning strategy was implemented to accelerate and accurately model larger systems by including small-size instances in the training set.
Article
Physics, Multidisciplinary
Ivan Morera, Rafal Oldziejewski, Grigori E. Astrakharchik, Bruno Julia-Diaz
Summary: We propose a mechanism for liquid formation in strongly correlated lattice systems by studying dipolar bosons in one-dimensional optical lattices as an example. We present a perturbative theory and validate it through simulations for the energetic and structural properties of the system's phases. We analyze the nonequilibrium properties and calculate the dynamic structure factor.
PHYSICAL REVIEW LETTERS
(2023)
Article
Physics, Multidisciplinary
Ivan Morera, Bruno Julia-Diaz, Manuel Valiente
Summary: In this study, we investigate the interaction of one-dimensional bosons in the universal low-energy regime. The combination of attractive and repulsive interactions stabilizes quantum gases, droplets, and liquids. We focus on the role of effective three-body repulsion in systems with weak attractive pairwise interactions and show that at low densities in the gas phase, the equations of state in both theories agree quantitatively for overall repulsion. However, this agreement is absent in the attractive regime, where universality only occurs in the long-distance properties of quantum droplets.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
Abel Rojo-Francas, Felipe Isaule, Bruno Julia-Diaz
Summary: This article describes a procedure to improve direct diagonalization results for few-particle systems trapped in one-dimensional harmonic potentials with contact interactions. The procedure starts with the two-body problem and defines a renormalization method for the interparticle interactions. The benchmarking of the procedure is done with state-of-the-art numerical results for three and four symmetric fermions.
Article
Optics
Felipe Isaule, Ivan Morera, Pietro Massignan, Bruno Julia-Diaz
Summary: In this study, properties of a single impurity in a dilute Bose gas, a Bose polaron, were investigated using the functional renormalization group. The energies of the attractive and repulsive branches of excitations in both two and three spatial dimensions were computed, showing good agreement with experimental measurements and numerical simulations.
Article
Materials Science, Multidisciplinary
Niccolo Baldelli, Bruno Julia-Diaz, Utso Bhattacharya, Maciej Lewenstein, Tobias Grass
Summary: The relationship between impurity particles and quasiholes in a system described by the Moore-Read wave function reveals the connection between their angular momentum and the physics of non-Abelian excitations, providing important evidence for proving the non-Abelian nature of the excitations.
Article
Optics
Felipe Isaule, Ivan Morera, Artur Polls, Bruno Julia-Diaz
Summary: The study focuses on weakly repulsive Bose-Bose mixtures in two and three dimensions at zero temperature using the functional renormalization group (FRG). It examines the RG flows, the role of density and spin fluctuations, conditions for phase separation, and compares FRG calculations favorably with known results from perturbative approaches for macroscopic properties.
Article
Physics, Multidisciplinary
Ivan Morera, Irenee Frerot, Artur Polls, Bruno Julia-Diaz
PHYSICAL REVIEW RESEARCH
(2020)
Article
Physics, Multidisciplinary
Ivan Morera, Grigori E. Astrakharchik, Artur Polls, Bruno Julia-Diaz
PHYSICAL REVIEW RESEARCH
(2020)
Article
Optics
A. Kievsky, A. Polls, B. Julia-Diaz, N. K. Timofeyuk, M. Gattobigio
Article
Optics
Eulalia Nicolau, Jordi Mompart, Bruno Julia-Diaz, Veronica Ahufinger
Article
Optics
Pere Mujal, Artur Polls, Bruno Julia-Diaz
