Results 101 to 110 of about 746,739 (376)

An Energy Consistent Discretization of the Nonhydrostatic Equations in Primitive Variables

open access: yesJournal of Advances in Modeling Earth Systems, 2020
We derive a formulation of the nonhydrostatic equations in spherical geometry with a Lorenz staggered vertical discretization. The combination conserves a discrete energy in exact time integration when coupled with a mimetic horizontal discretization ...
Mark A. Taylor   +5 more
doaj   +1 more source

Hamiltonian of a flux qubit-LC oscillator circuit in the deep–strong-coupling regime

open access: yesScientific Reports, 2022
We derive the Hamiltonian of a superconducting circuit that comprises a single-Josephson-junction flux qubit inductively coupled to an LC oscillator, and we compare the derived circuit Hamiltonian with the quantum Rabi Hamiltonian, which describes a two ...
F. Yoshihara   +4 more
doaj   +1 more source

Single Pair of Weyl Points Evolve From Spin Group‐Protected Nodal Line in Half‐Metallic Ferromagnet V3S4

open access: yesAdvanced Functional Materials, EarlyView.
A spin group (SG)‐based mechanism is proposed to realize a single pair of Weyl points. PT‐symmetric nodal lines (NLs) persist under T‐breaking, protected by the combination of SG and P symmetry. When considering spin‐orbit coupling, the SG‐protected NL will split into Weyl points, which will also induce anomalous transport phenomena arising from ...
Shifeng Qian   +6 more
wiley   +1 more source

Smooth-Switching Control of Robot-Based Permanent-Magnet Synchronous Motors via Port-Controlled Hamiltonian and Feedback Linearization

open access: yesEnergies, 2020
To solve the contradiction between dynamic performance and steady-state performance of the robot system, a smooth-switching control strategy is proposed.
Anxing Liu, Haisheng Yu
doaj   +1 more source

Nested Locally Hamiltonian Graphs and the Oberly-Sumner Conjecture

open access: yesDiscussiones Mathematicae Graph Theory, 2022
A graph G is locally 𝒫, abbreviated L𝒫, if for every vertex v in G the open neighbourhood N(v) of v is non-empty and induces a graph with property 𝒫. Specifically, a graph G without isolated vertices is locally connected (LC) if N(v) induces a connected ...
de Wet Johan P., Frick Marietjie
doaj   +1 more source

Shadow Magnetic Hamiltonian Monte Carlo

open access: yesIEEE Access, 2022
Incorporating partial momentum refreshment into Magnetic Hamiltonian Monte Carlo (MHMC) to create Magnetic Hamiltonian Monte Carlo with partial momentum refreshment (PMHMC) has been shown to improve the sampling performance of MHMC significantly.
Wilson Tsakane Mongwe   +2 more
doaj   +1 more source

On the Convexity of the KdV Hamiltonian [PDF]

open access: yesCommunications in Mathematical Physics, 2016
We prove that the nonlinear part $H^{*}$ of the KdV Hamiltonian $H^{kdv}$, when expressed in action variables $I = (I_{n})_{n\ge 1}$, extends to a real analytic function on the positive quadrant $\ell^2_+(\mathbb N)$ of $\ell^{2}(\mathbb N)$ and is strictly concave near $0$.
Kappeler, T.   +3 more
openaire   +5 more sources

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

open access: yesAdvanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong   +3 more
wiley   +1 more source

Analysis of Kinetic Properties and Tunnel-Coupled States in Asymmetrical Multilayer Semiconductor Structures

open access: yesEast European Journal of Physics
This study investigates the kinetic properties of both symmetrical and asymmetrical multilayer and nano-sized semiconductor structures. We develop a theoretical framework using various models and mathematical methods to solve the Schrödinger matrix ...
Rustam Y. Rasulov   +4 more
doaj   +1 more source

Hamiltonian oracles

open access: yesPhysical Review A, 2007
16 pages, REVTeX 4 (minor corrections in v2)
openaire   +2 more sources

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