Results 31 to 40 of about 212,455 (290)
Phase portraits of generalf(T) cosmology [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 39 pages, 12 figures, version published in ...
Awad, A. +3 more
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The phase portrait of the Hamiltonian system associated to a Pinchuk map
Anais da Academia Brasileira de CiênciasIn this paper we describe the global phase portrait of the Hamiltonian system associated to a Pinchuk map in the Poincaré disc. In particular, we prove that this phase portrait has 15 separatrices, five of them singular points, and 7 canonical regions ...
JOAN CARLES ARTÉS +2 more
doaj +1 more source
Wigner flow reveals topological order in quantum phase space dynamics [PDF]
, 2013 The behaviour of classical mechanical systems is characterised by their phase portraits, the collections of their trajectories. Heisenberg's uncertainty principle precludes the existence of sharply defined trajectories, which is why traditionally only ...
Dimitris Kakofengitis +6 more
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Phase Portraits of Planar Semi-Homogeneous Vector Fields (III) [PDF]
Qualitative Theory of Dynamical Systems, 1997 The authors study phase-portraits of semi-homogeneous plane vector fields of degrees \(1\) and \(3\), \[ \dot x= ax+ by,\quad \dot y= Ax^3+ Bx^2y+ Cxy^2+ Dy^3,\tag{1} \] with \(|a|+|b|\neq 0\) and \(|A|+|B|+|C|+|D|\neq 0\), and having only finitely many critical points.
Cairó, Laurent, Llibre, Jaume
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Rare Events Statistics in Reaction--Diffusion Systems
, 2004 We develop an efficient method to calculate probabilities of large deviations from the typical behavior (rare events) in reaction--diffusion systems.
A. Kamenev +15 more
core +1 more source
Frequency-Dependent Template Profiles for High Precision Pulsar Timing [PDF]
, 2018 Pulsar timing experiments require high fidelity template profiles in order to minimize the biases in pulse time-of-arrival (TOA) measurements and their uncertainties.
Pennucci, Timothy T.
core +2 more sources
Electronic Journal of Qualitative Theory of Differential Equations, 2021 In 1998, Artés, Kooij and Llibre proved that there exist 44 structurally stable topologically distinct phase portraits modulo limit cycles, and in 2018 Artés, Llibre and Rezende showed the existence of at least 204 (at most 211) structurally unstable ...
Joan Artés, Marcos Mota, Alex Rezende
doaj +1 more source
, 2000 We consider the class of autonomous systems $\dot x=f(x)$, where $x \in {\bf R}^{2n}$, $f \in C^1({\bf R}^{2n})$ whose phase portrait is a Cartesian product of $n$ two-dimensional {\em centres}. We also consider perturbations of this system, namely $\dot
Ilyin, Yuri A.
core +1 more source
Three‐dimensional Antimony Sulfide Based Flat Optics
Advanced Functional Materials, EarlyView.This work presents the development of a grayscale electron beam lithography (g‐EBL) method for fabricating antimony trisulfide (Sb2S3) nanostructures with customizable 3D profiles. The refractive index of g‐EBL patterned Sb2S3 is determined based on the synergy of genetic algorithm and transfer matrix method.
Wei Wang +18 more
wiley +1 more source
Advanced Functional Materials, EarlyView.ACC forms via aggregating prenucleation clusters that gatekeep its chemical composition. Ion identity steers the path: Ba and Sr substitute Ca in clusters, thereby inhibiting nucleation, with a dose‐dependent switch of Sr to induction. Mg partitions into Mg‐rich and Mg‐poor clusters; the latter form ACC, expelling Mg.
Qianyu Zhao +9 more
wiley +1 more source