Results 31 to 40 of about 15,908 (261)
Splitting Methods for Semi-Classical Hamiltonian Dynamics of Charge Transfer in Nonlinear Lattices
Mathematics, 2022 We propose two classes of symplecticity-preserving symmetric splitting methods for semi-classical Hamiltonian dynamics of charge transfer by intrinsic localized modes in nonlinear crystal lattice models.
Jānis Bajārs, Juan F. R. Archilla
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Some Oscillation Results for Linear Hamiltonian Systems [PDF]
Journal of Applied Mathematics, 2012 The purpose of this paper is to develop a generalized matrix Riccati technique for the selfadjoint matrix Hamiltonian system U′ = A(t)U + B(t)V, V′ = C(t)U − A∗(t)V. By using the standard integral averaging technique and positive functionals, new oscillation and interval oscillation criteria are established for the system.
Wang, Nan, Meng, Fanwei
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On the deformation of linear Hamiltonian systems [PDF]
Journal of Mathematical Analysis and Applications, 2021 30 pages, minor ...
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Linear Quantum Entropy and Non-Hermitian Hamiltonians
Entropy, 2016 We consider the description of open quantum systems with probability sinks (or sources) in terms of general non-Hermitian Hamiltonians. Within such a framework, we study novel possible definitions of the quantum linear entropy as an indicator of the flow
Alessandro Sergi, Paolo V. Giaquinta
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Critical brain wave dynamics of neuronal avalanches
Frontiers in Physics, 2023 Analytical expressions for scaling of brain wave spectra derived from the general non-linear wave Hamiltonian form show excellent agreement with experimental “neuronal avalanche” data.
Vitaly L. Galinsky +2 more
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The Linearized Vlasov-Maxwell System as a Hamiltonian System
Journal of Computational PhysicsWe present a Hamiltonian formulation for the linearized Vlasov-Maxwell system with a Maxwellian background distribution function. We discuss the geometric properties of the model at the continuous level, and how to discretize the model in the GEMPIC framework [1]. This method allows us to preserve the structure of the system at the semi-discrete level.
Dominik Bell +3 more
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Quark-Antiquark Effective Potential in Symplectic Quantum Mechanics
Advances in High Energy Physics, 2022 In this paper, we study within the structure of Symplectic Quantum Mechanics a bidimensional nonrelativistic strong interaction system which represent the bound state of heavy quark-antiquark, where we consider a Cornell potential which consists of ...
Renato Luz +5 more
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Energy-Based Modeling and Hamiltonian LQG Control of a Flexible Beam Actuated by IPMC Actuators
IEEE Access, 2022 The control of a flexible beam using ionic polymer metal composites (IPMCs) is investigated in this paper. The mechanical flexible dynamics are modelled as a Timoshenko beam. The electric dynamics of the IPMCs are considered in the model.
Weijun Zhou +4 more
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Fostering Innovation: Streamlining Magnetocaloric Materials Research by Digitalization
Advanced Engineering Materials, EarlyView.Magnetocaloric cooling (MCE) is an environmentally friendly refrigeration method with great potential. Optimizing MCE materials involves the preparation and screening of large quantities of samples, which in turn generates a large amount of data. A digitalization approach is presented that uses ontologies, knowledge graphs, and digital workflows to ...
Simon Bekemeier +17 more
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Ferroelectricity in Antiferromagnetic Wurtzite Nitrides
Advanced Functional Materials, EarlyView.We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa +3 more
wiley +1 more source