Article
Chemistry, Physical
Lixin Lu, Hang Hu, Andrew J. Jenkins, Xiaosong Li
Summary: As relativistic corrections become stronger for late-row elements, the fully perturbative treatment may not be adequate for accurate descriptions of chemical properties. In this work, a determinant-based Kramers-unrestricted exact-two-component multi-reference second-order perturbation method is introduced, which includes relativistic corrections with a perturbative dynamic correlation.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2022)
Article
Engineering, Mechanical
M. Araghi, S. Mahdizadeh, H. Mahdizadeh, S. Moodi
Summary: This paper presents a second-order Godunov-type finite volume technique based on the wave propagation algorithm for addressing second-order, one-dimensional, macroscopic traffic flow models. The results show that this approach provides stable and realistic response without the need for additional numerical treatment. Comparisons with high-order relaxation schemes also demonstrate good agreement and performance of the defined method.
NONLINEAR DYNAMICS
(2021)
Article
Chemistry, Physical
Chaohong Wang, Jianyang Wu, Hao Wang, Zhisen Zhang
Summary: Accurately estimating the nucleation rate is crucial, but it depends on thermodynamic parameters, leading to uncertainties in the estimates. Researchers derived second-order analytical formulas to describe the temperature dependence of these parameters, providing a new method for estimating them.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Rohollah Ezzati, Saeid Ezzati, Maryam Azizi
Summary: This study demonstrates the accuracy of the Langmuir adsorption rate equation in calculating the adsorption rate constant. It also investigates the derivation conditions of the pseudo-first-order and pseudo-second-order kinetics models from Langmuir kinetics.
Article
Computer Science, Interdisciplinary Applications
Remi Feuillet, Matthieu Maunoury, Adrien Loseille
Summary: This paper presents a novel approach based on the OpenGL 4 framework that enables GPU-based rendering of high-order meshes and solutions. By utilizing fragment shaders and tessellation shaders, along with techniques like Bezier bases, the method allows for more precise and efficient rendering compared to standard techniques.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Automation & Control Systems
Guocheng Hao, Jieting Meng, Juan Guo, Jiantao Yu, Pei Wang, Chenbin Wu
Summary: This paper proposes a second-order transient-extracting generalized Warblet transform method based on fractional Fourier transform optimization of variational mode decomposition. By combining Fourier transform with variational mode decomposition, the method solves the problem of low-precision time-frequency analysis and improves the time-frequency concentration and noise resistance of signals.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Artificial Intelligence
Weichuan Zhang, Changming Sun
Summary: This study evaluates the capability of second-order generalized Gaussian directional derivative filters in suppressing Gaussian noise and explores the properties of corners and edges to propose a new image corner detection method. Experimental results demonstrate that the proposed detector outperforms other tested detectors.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2021)
Article
Physics, Multidisciplinary
Yusong Cao, Junpeng Cao
Summary: An integrable non-Hermitian generalized Rabi model is constructed in this study, introducing a twist matrix to generate the non-Hermitian properties, and proving the Yang-Baxter integrability of the system. The exact energy spectrum and eigenstates are obtained using the Bethe ansatz, providing a general way to construct integrable spin-boson models.
CHINESE PHYSICS LETTERS
(2021)
Article
Mathematics, Applied
Danping Ding, Kai Wang
Summary: This paper investigates the blow-up solution and its rate near the traveling waves of the second-order Camassa-Holm equation. A sufficient condition for the existence of blow-up solution is obtained through a clever method, and a relationship is established between the blow-up time and rate of the solution and the residual's.
NONLINEAR ANALYSIS-REAL WORLD APPLICATIONS
(2021)
Article
Automation & Control Systems
Ulises Perez-Ventura, Jonathan Escobar, Leonid Fridman, Rafael Iriarte
Summary: This paper proposes a design methodology for the second-order robust exact differentiator in the presence of small time-delays in signal processing. It uses the describing function to provide multiple sets of gains that ensure high accuracy in reconstructing the first-order derivative of smooth signals and minimizing the main harmonic of chattering. The proposal fulfills Loeb's criterion and proves the global finite-time stability of the non-delayed differentiator using a homogeneous Lyapunov function. Numerical examples are provided to illustrate the results.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Astronomy & Astrophysics
Xin-Yang Wang, Jie Jiang
Summary: The applicability of the Wald entropy to the second law of black hole thermodynamics is discussed, and a general expression for the entropy of black holes that satisfies the linearized second law is obtained. However, more research is needed to determine whether the Wald entropy of black holes with nonminimal coupling matter fields satisfies the second law sufficiently.
Article
Chemistry, Physical
Yuncai Mei, Zehua Chen, Weitao Yang
Summary: The developed second-order correction eliminates systematic delocalization error in commonly used density functional approximations. It provides highly accurate approximation of ground-state orbital energies for small and medium-size molecules, with excellent predictions for ionization potentials, electron affinities, photoemission spectrum, and photoexcitation energies. This correction shows great potential for broad applications in computational spectroscopy.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Mathematics, Applied
Zijun Hao, Zhongping Wan, Xiaoni Chi, Zheng-Fen Jin
Summary: The generalized lower-order penalty algorithm is proposed for solving the second-order cone mixed complementarity problems (SOCMCPs), with the proof of convergence under certain assumptions. Numerical results are reported to examine the efficiency of the algorithm.
JOURNAL OF COMPUTATIONAL AND APPLIED MATHEMATICS
(2021)
Article
Automation & Control Systems
Dan Ma, Jie Chen, Tianyou Chai
Summary: This article investigates the exact computation of the DCM for general second-order multi-agent systems under distributed feedback protocols, showing that it can be determined by solving a non-smooth quasi-concave optimization problem. The DCM can be computed via convex optimization methods.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2022)
Article
Operations Research & Management Science
Sergio Gonzalez-Andrade, Sofia Lopez-Ordonez, Pedro Merino
Summary: The study explores the exact penalization of the incompressibility condition for the velocity field of a bi-viscous fluid using the L-1-norm, resulting in a nonsmooth optimization problem that is solved by an algorithm utilizing generalized second-order information. The advantage of the proposed method is that it enforces the divergence-free property without the need for built-in divergence-free approximation schemes. Additionally, an inexact penalization approach using the L-2-norm is also discussed and compared.
COMPUTATIONAL OPTIMIZATION AND APPLICATIONS
(2021)
Article
Physics, Applied
Ke Wang, Xiansong Xu, Yuan Cheng, Min Zhang, Jian-Sheng Wang, Hai Wang, Gang Zhang
Summary: Using density functional theory calculations, we investigated the spin-wave spectrum and magnon-phonon interaction in the CGT monolayer. The MPI in the CGT monolayer exhibits weak in-plane isotropy and a strong wave vector dependence. The temperature increase from 5K to 55K leads to a 4 times decrease in the magnon relaxation time, emphasizing the significance of MPI in the spin dynamics of the ferromagnetic CGT monolayer.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Xuefei Liu, Zhaofu Zhang, Zhao Ding, Bing Lv, Zijiang Luo, Jian-Sheng Wang, Zhibin Gao
Summary: A study using first principles method systematically predicted the anisotropic electronic and mechanical properties of 2D As2S3, showing a significantly higher Young's modulus ratio along two axes compared to black phosphorous. These findings provide valuable insights for the realization of flexible orientation-dependent nano-devices.
APPLIED SURFACE SCIENCE
(2021)
Editorial Material
Chemistry, Physical
Alvaro Tejero, Juzar Thingna, Daniel Manzano
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Jakub Spiechowicz, Peter Haenggi, Jerzy Luczka
Summary: This study investigates the phenomenon of multistability in the velocity dynamics of a Brownian particle. It finds that the multistability is robust with respect to the choice of the starting position and velocity of the particle for moderate and high temperatures, but is affected by initial conditions in the low temperature regime.
Article
Thermodynamics
Yong-Mei Zhang, Mauro Antezza, Jian-Sheng Wang
Summary: The presence of interlayer interactions in twisted bilayer graphene (TBG) enhances several characteristics, including the optical and electronic properties. A series of double magic angles have been theoretically investigated in TBG. The thermal radiation from TBG can be tuned to the far infrared range by changing twist angles.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Physics, Multidisciplinary
Jakub Spiechowicz, Ivan G. Marchenko, Peter Haenggi, Jerzy Luczka
Summary: The diffusion of small particles is widely studied and applied in various scientific fields. This article focuses on the temperature dependence of the diffusion coefficient for a Brownian particle, exploring different physical systems and their diffusion characteristics.
Article
Materials Science, Multidisciplinary
Hangbo Zhou, Gang Zhang, Jian-Sheng Wang, Yong-Wei Zhang
Summary: We investigate the anharmonic phonon scattering across a weakly interacting interface and find that the contribution from anharmonic three-phonon scatterings can be described by a temperature-dependent Landauer formula. Surprisingly, in the weak coupling limit, the transmission due to anharmonic phonon scattering increases indefinitely with temperature, which is not the case for two-phonon processes. We further reveal that anharmonic effects dominate over harmonic processes even at room temperature in real heterogeneous interfaces, emphasizing the importance of anharmonicity in weakly interacting systems.
Article
Physics, Multidisciplinary
Tobias Becker, Alexander Schnell, Juzar Thingna
Summary: This paper introduces a new class of quantum master equations that accurately reproduce the asymptotic state of an open quantum system beyond the infinitesimally weak system-bath coupling limit, while improving the accuracy of traditional master equations and correcting the issue of positivity violation.
PHYSICAL REVIEW LETTERS
(2022)
Review
Physics, Multidisciplinary
Jian-Sheng Wang, Jiebin Peng, Zu-Quan Zhang, Yong-Mei Zhang, Tao Zhu
Summary: This article discusses the description and modeling of transport phenomena in electron systems coupled via scalar or vector photons. It is divided into three parts: scalar photons (Coulomb interactions), transverse photons (described by vector potentials), and the phi = 0 or temporal gauge, which is a complete theory of electrodynamics. The nonequilibrium Green's function (NEGF) formalism is used as a tool to study steady-state transport, with the advantage of going beyond fluctuational electrodynamics (FE) due to its generality. Several examples are provided, including heat transfer between graphene sheets, light emission from a double quantum dot, and emission of energy, momentum, and angular momentum from a graphene nanoribbon. All calculations are based on a generalization of the Meir-Wingreen formula, with materials properties represented by photon self-energy and coupled with the Keldysh equation and the solution to the Dyson equation.
FRONTIERS OF PHYSICS
(2023)
Article
Optics
Jeongrak Son, Peter Talkner, Juzar Thingna
Summary: This study investigates the charging of a quantum battery by a four-stroke quantum machine. It is found that periodic measurements during the charging process can speed up the charging, but the gain of ergotropy is more pronounced in the absence of measurements. The influence of measurements on battery performance differs between the engine and refrigerator modes, with measurements having a larger impact on the engine mode.
Article
Materials Science, Multidisciplinary
Yong-Mei Zhang, Tao Zhu, Zu-Quan Zhang, Jian-Sheng Wang
Summary: We have developed a general microscopic theory for the transfer of energy, momentum, and angular momentum mediated by photons. Using the nonequilibrium Green's function method, we have proposed a unified formalism for describing the energy emitted, force experienced, and torque experienced by objects due to fluctuating electromagnetic fields. Our theory does not rely on the assumption of local thermal equilibrium and is applicable to arbitrary objects and non-reciprocal environments. By applying our theory to transport problems of graphene edges, we have demonstrated its capability and shown results that go beyond the predictive ability of conventional theories.
Article
Materials Science, Multidisciplinary
Jayendra N. Bandyopadhyay, Juzar Thingna
Summary: We propose a Floquet engineering formalism to design a periodic driving protocol for realizing the desired system from a given static Hamiltonian. This method is applicable to interacting and noninteracting quantum systems with a closed Lie algebraic structure, and is not restricted by the driving frequency. By fixing the gauge of the micromotion, we can engineer the functional form and operators of the driving protocol.
Article
Optics
JungYun Han, Daniel Leykam, Dimitris G. Angelakis, Juzar Thingna
Summary: In this study, we investigated nonequilibrium quantum heat transport in nonlinear bosonic systems under nonKerr-type interaction, predicting a negative excitation mode and cooling effect. Analytically estimating the thermodynamic response and numerically demonstrating heat current transitions, we showed long relaxation times in the cooling phase. Our findings suggest a potential manipulation of quantum states by inducing cooling through system interactions.
Article
Quantum Science & Technology
Jeongrak Son, Peter Talkner, Juzar Thingna
Summary: Two diagnostic schemes for quantum Otto heat engines were compared, with the scheme of repeated contacts showing significantly reduced number of measurements and better maintenance of quantum coherence.
Article
Materials Science, Multidisciplinary
Tianqi Deng, Gang Wu, Wen Shi, Zicong Marvin Wong, Jian-Sheng Wang, Shuo-Wang Yang
Summary: Researchers developed a new ab initio formalism for dipolar electron-phonon interactions in 2D materials, finding that out-of-plane dipoles contribute to the behavior of interactions. The study showed that the Frohlich model is inadequate for 2D materials and that a correct long-wavelength interaction is essential for reliable predictions.