Article
Physics, Nuclear
Victor Miguel Banda Guzman, Ruben Flores-Mendieta, Johann Hernandez
Summary: This article introduces the commonly used properties of rotational bands in the analysis of atomic nuclear spectra, and details the interaction boson model of Arima and Iachello and its description of nuclear rotation. The article also proposes the partial dynamical symmetry approach to address the symmetry issues in realistic systems, and introduces the algebraic method called the projection operator technique for constructing higher-order interaction terms.
EUROPEAN PHYSICAL JOURNAL A
(2022)
Article
Business, Finance
Jong Jun Park, Hyun Jin Jang
Summary: This study proposes a network-based contagious default model and derives the probability of multiple defaults and expected recovery rate in analytic form, allowing for the quantification of systemic risk.
FINANCE RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Mostafa Tanhayi Ahari, Yaroslav Tserkovnyak
Summary: We investigate spin-resolved Andreev bound states in a hybrid superconductor-ferromagnetic-insulator structure. The transfer of spin angular momentum by an externally driven ferromagnetic insulator is greatly affected by the formation of these bound states at low bias and below the critical temperature. Resonant Andreev bound states in superconducting layer of finite thickness establish highly transmitting subgap spin transport channels, forming a prototype Fabry-Perot resonator for spin pumping.
Article
Physics, Multidisciplinary
Feng Liu, Zhenhao Fan, Zhipeng Sun, Xuzong Chen, Dingping Li
Summary: The systematic non-perturbative method developed based on Dyson-Schwinger theory and the derivable theory for Ising model at broken phase allows for obtaining critical temperature and spin spin correlation beyond mean field theory. The gapless spectrum of Green function obtained from this method at critical point results in divergent susceptibility at T-c. The critical temperature of Ising model obtained from this method is fairly good compared to other non-cluster methods and can be extended to more complex spin models with continuous symmetry.
FRONTIERS OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
B. S. Hu, J. Padua-Arguelles, S. Leutheusser, T. Miyagi, S. R. Stroberg, J. D. Holt
Summary: This study presents converged ab initio calculations of structure factors for elastic spin-dependent WIMP scattering off various nuclei used in dark matter direct-detection searches, providing insights into WIMP-nucleon interactions and nuclear responses. The results are generally consistent with previous calculations, but significant uncertainties in I-127 underscore the need for further research.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
David Jakab, Zoltan Zimboras
Summary: We study a bipartite collective spin-1 model with exchange interaction, where spins are divided into two equal-sized subsystems with equal interactions within and across each subsystem but different coupling values. Using symmetry and representation theoretic methods, the Hamiltonian of the system is diagonalized and the ground-state phase diagram is explored, revealing both gapped and gapless phases. Interestingly, one phase shows strong bipartite symmetry breaking with the two subsystems in different SU(3) representations.
Article
Physics, Multidisciplinary
Hui-Ke Jin, Johannes Knolle, Michael Knap
Summary: We study a driven Kitaev honeycomb model and analyze the dynamics of emergent Majorana matter and Z2 flux excitations. We find a distinct two-step heating process, known as fractionalized prethermalization, and a quasi-stationary state with significantly different temperatures for the matter and flux sectors. We argue that this unique prethermalization behavior is a consequence of fractionalization. In addition, we propose an experimentally feasible protocol for preparing a low energy density zero-flux initial state of the Kiteav honeycomb model, which can be used to observe fractionalized prethermalization in quantum information processing platforms.
PHYSICAL REVIEW LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Cuijuan Liao, Xingjie Lu, Yuanyuan Huang, Feng Tao, David M. Lawrence, Charles D. Koven, Keith W. Oleson, William R. Wieder, Erik Kluzek, Xiaomeng Huang, Yiqi Luo
Summary: This study introduces a new Semi-Analytical Spin-Up (SASU) method to tackle the problem of steady state initialization in global biogeochemical cycle models. The experiments at the Brazil site showed that SASU is computationally 7 times more efficient than the traditional native dynamics (ND) spin-up method and globally it is 8 times more efficient than the accelerated decomposition spin-up and 50 times more efficient than ND. In summary, SASU achieves the highest computational efficiency for spin-up compared to other methods, making computationally costly studies possible for a better understanding of biogeochemical cycling under climate change.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2023)
Article
Biochemical Research Methods
Thao Vu, Julia Wrobel, Benjamin G. Bitler, Erin L. Schenk, Kimberly R. Jordan, Debashis Ghosh
Summary: Investigating spatial patterns and interactions of cells in the tumor microenvironment (TME) provides useful insights into cancer development and progression. In this work, we proposed a novel approach which combined established spatial summary functions with functional data analysis to flexibly model the cell-cell interactions with overall survival at different inter-cell distances, in conjunction with other clinical predictors such as age, disease stage. By applying the proposed framework to multiplex immunohistochemistry (mIHC) data of patients with non-small cell lung cancer (NSCLC), we studied the nonlinear impact of spatial interactions between tumor and stromal cells on overall survival. The applicability of our proposed method is further validated using a publicly available multiplexed ion beam imaging (MIBI) triple-negative breast cancer (TNBC) dataset.
PLOS COMPUTATIONAL BIOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Werner Dobrautz, Vamshi M. Katukuri, Nikolay A. Bogdanov, Daniel Kats, Giovanni Li Manni, Ali Alavi
Summary: This study uses a novel approach that combines unitary and symmetric groups to investigate the spin-1/2 Heisenberg model and related Fermionic systems. The results show that combining these groups leads to a more compact representation of the ground-state wave function. Additionally, the compression of the wave function allows for the study of larger lattices.
Article
Physics, Multidisciplinary
Christopher V. Cappiello
Summary: If dark matter interacts too strongly with nuclei, it may become undetectable due to slowing down in Earth's crust or atmosphere. For sub-GeV dark matter, existing approximations are insufficient and computationally expensive simulations are needed. The authors propose a new analytic approximation method for studying the attenuation of light dark matter in Earth, which agrees well with Monte Carlo results and is more efficient for higher cross-sections. They use this method to reanalyze constraints on subdominant dark matter.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Louk Rademaker
Summary: This article investigates the valence flat bands in transition metal dichalcogenide heterobilayers, which exhibit strong intralayer spin-orbit coupling. By applying symmetry constraints to a tight-binding model of the valence flat bands, the author demonstrates the spin-dependent complex phase of hopping terms. Additionally, the model becomes equivalent to the Kane-Mele model of topological insulators when a perpendicular electric field causes interlayer hybridization. This proposed model serves as a starting point for understanding interactions and experimentally observed topological transitions.
Article
Psychology, Multidisciplinary
Valentin Marian Antohi, Monica Laura Zlati, Romeo Victor Ionescu, Nicoleta Cristache
Summary: This study conducted a survey to identify major behavioral changes in online buyers and synthesized the findings into an econometric model to explain the impact of cultural, social, personal, and psychological traits on online purchasing.
FRONTIERS IN PSYCHOLOGY
(2022)
Article
Materials Science, Multidisciplinary
M. A. Manya, G. B. Martins, M. S. Figueira
Summary: This study investigates the effects of Rashba and Dresselhaus spin-orbit coupling on the thermoelectric transport properties of a single-electron transistor connected to one-dimensional leads. The results demonstrate a significant increase in the thermoelectric figure of merit caused by spin-orbit coupling in the one-dimensional quantum dot leads.
Article
Multidisciplinary Sciences
Pedro J. Saenz, Giuseppe Pucci, Sam E. Turton, Alexis Goujon, Rodolfo R. Rosales, Jorn Dunkel, John W. M. Bush
Summary: The passage introduces hydrodynamic spin lattices (HSLs) of 'walking' droplets as a class of active spin systems with particle-wave coupling, revealing various non-equilibrium symmetry-breaking phenomena that can be controlled by varying lattice geometry and system rotation. Theoretical predictions based on a generalized Kuramoto model rationalize experimental observations, establishing HSLs as a versatile platform for exploring active phase oscillator dynamics. The tunability of HSLs suggests exciting directions for future research, from active spin-wave dynamics to hydrodynamic analogue computation and droplet-based topological insulators.
