Results 81 to 90 of about 9,550,679 (229)
Multiple periodic solutions for a fourth-order discrete Hamiltonian system [PDF]
Surveys in Mathematics and its Applications, 2010 By means of a three critical points theorem proposed by Brezis and Nirenberg and a general version of Mountain Pass Theorem, we obtain some multiplicity results for periodic solutions of a fourth-order discrete Hamiltonian system Δ4u(t-2)+∇ F(t,u(t))=0 ...
Yongkun Li, Jianwen Zhou
doaj
A review of some geometric integrators
Advanced Modeling and Simulation in Engineering Sciences, 2018 Some of the most important geometric integrators for both ordinary and partial differential equations are reviewed and illustrated with examples in mechanics.
Dina Razafindralandy +2 more
doaj +1 more source
A Finite Dimensional Approximation of the shallow water Equations: The port-Hamiltonian Approach [PDF]
, 2006 We look into the problem of approximating a distributed parameter port-Hamiltonian system which is represented by a non-constant Stokes-Dirac structure.
Ramkrishna Pasumarthy, R.P. +8 more
core +4 more sources
Chemistry – A European Journal, EarlyView.A triangular double‐decker Ni6 complex self‐assembles from Ni(II), TMEDA, and a triphenylene tris dioxolene non‐innocent ligand, with two face‐to‐face tris‐semiquinone decks held by a strong covalent C─C interaction. This rigid scaffold delivers four reversible ligand‐centered redox events: oxidation switches on an intense near‐infrared band and ...
Aristide Colin +12 more
wiley +1 more source
Homoclinic solutions of second-order discrete Hamiltonian systems with subquadratic nonlinearities
Open MathematicsThis paper investigates the second-order discrete Hamiltonian system Δ[P(k)Δu(k−1)]−L(k)u(k)+∇W(k,u(k))=0 ${\Delta}\left[\mathbb{P}\left(k\right){\Delta}u\left(k-1\right)\right]-\mathbb{L}\left(k\right)u\left(k\right)+\nabla \mathbb{W}\left(k,u\left(k ...
Liu Ziqiang +3 more
doaj +1 more source
Solutions of a Two-Particle Interacting Quantum Walk
Entropy, 2018 We study the solutions of an interacting Fermionic cellular automaton which is the analogue of the Thirring model with both space and time discrete. We present a derivation of the two-particle solutions of the automaton recently in the literature, which ...
Alessandro Bisio +4 more
doaj +1 more source
Quenching the Hubbard Model: Comparison of Nonequilibrium Green's Function Methods
Contributions to Plasma Physics, EarlyView.ABSTRACT We benchmark nonequilibrium Green's function (NEGF) approaches for interaction quenches in the half‐filled Fermi–Hubbard model in one and two dimensions. We compare fully self‐consistent two‐time Kadanoff–Baym equations (KBE), the generalized Kadanoff–Baym ansatz (GKBA), and the recently developed NEGF‐based quantum fluctuations approach (NEGF‐
Jan‐Philip Joost +3 more
wiley +1 more source
Topological Invariant of Integrable Hamiltonian System on Cone Located in a Potential Field
پژوهشهای ریاضی, 2020 The theory of topological classification of integrable Hamiltonian systems with two degrees of freedom due to Fomenko and his school. On the basis of this theory we give a topological Liouville classification of the integrable Hamiltonian systems with ...
Ghorbanali Haghiighatdoost,
doaj
Hamiltonian PDEs: new connections between dynamical systems and PDEs with small divisors phenomena
, 2008 Many partial differential equations arising in physics can be seen as infinite dimensional Hamiltonian systems. Main examples are the nonlinear wave equation, the nonlinear Schrödinger equation, the beam, the membrane and the Kirkhoff equations in ...
BERTI, MASSIMILIANO
core
Ultrafast Transitions in X‐Ray Irradiated Solids
Contributions to Plasma Physics, EarlyView.ABSTRACT In this review, we present current developments on modeling ultrafast transitions in solids triggered by intense, atto‐ to femtosecond pulses from X‐ray free electron lasers. This specific irradiation regime requires dedicated simulation tools based on theoretical and computational methods, involving the elements of classical and quantum ...
Sebastião Antunes +3 more
wiley +1 more source