Results 111 to 120 of about 504,986 (312)
Spring and Power in Hovering Ornithopters
Advanced Intelligent Systems, EarlyView.Only small ornithopters can hover, longest at the hummingbird size. This article reviews the drive and power of these hovering machines, focusing on elastic energy and thrust boosters. Unlike two‐winged designs, X‐winged and multiple‐V‐winged ornithopters benefit from lower disk loading and slower, smaller wingbeats, and the clap‐and‐fling effect ...
Gih‐Keong Lau +4 more
wiley +1 more source
Aufbau principle and singlet‐triplet gap in spherical Hooke atoms
International Journal of Quantum Chemistry, Volume 123, Issue 3, February 5, 2023., 2023 The singlet‐triplet gap for three dimensional Hooke atoms is characterized using high‐level quantum methods with optimized basis sets. The effect of the confinement potential and screening effects is discussed. We have found that the triplet‐singlet gap as a function of the numbers of electrons can be rationalized with the following orbital ordering 1s<
Xabier Telleria‐Allika +5 more
wiley +1 more source
Journal of High Energy PhysicsWe provide a formulation of quantum mechanics based on the cohomology of the Batalin-Vilkovisky (BV) algebra. Focusing on quantum-mechanical systems without gauge symmetry we introduce a homotopy retract from the chain complex of the harmonic oscillator ...
Christoph Chiaffrino +2 more
doaj +1 more source
H-Theorem in an Isolated Quantum Harmonic Oscillator. [PDF]
Entropy (Basel), 2022 Hsueh CH, Cheng CH, Horng TL, Wu WC.
europepmc +1 more source
Relativistic Ladder Operators for the Three-Dimensional Harmonic Oscillator [PDF]
arXiv, 2009 The quantum constraint equations for a relativistic three-dimensional harmonic oscillator are shown to find concise expression in terms of Lorentz covariant ladder operators. These ladder operators consist of two conjugate 4-vectors that are each constrained to generate three linearly independent combinations of ladder operator components for raising ...
arxiv
Exact Solution of a Time-Dependent Quantum Harmonic Oscillator with Two Frequency Jumps via the Lewis-Riesenfeld Dynamical Invariant Method. [PDF]
Entropy (Basel), 2022 Coelho SS, Queiroz L, Alves DT.
europepmc +1 more source
The quantization of energy in the harmonic-oscillator potential: Power series solution [PDF]
arXiv, 2005 We write a computer program that uses the recursion relation to calculate wave function in the harmonic-oscillator potential for specified values of E/hv (with its deviation 0.001) containing only even numbers of v (0,2,4,...). In this work, differential equations are solved by power series methods, i.e.
arxiv
Asymmetric variation of a finite mass harmonic like oscillator
Results in Physics, 2020 Classical and quantum mechanical analysis have been carried out on harmonic like oscillator with asymmetric position dependent mass. Phase space analysis are performed both classically and quantum mechanically for a plausible understanding of the subject.
Jihad Asad +6 more
doaj
Nonequilibrium quantum fluctuation relations for harmonic systems in nonthermal environments
New Journal of Physics, 2013 We formulate exact generalized nonequilibrium fluctuation relations for the quantum mechanical harmonic oscillator coupled to multiple harmonic baths. Each of the different baths is prepared in its own individual (in general nonthermal) state.
D Pagel +4 more
doaj +1 more source
Randomly Walking 1D Quantum Harmonic Oscillator. Averaged Transition Probabilities [PDF]
arXiv, 1999 One-dimensional problem for quantum harmonic oscillator with "regular+random" frequency subjected to the external "regular+random" force is considered. Averaged transition probabilities are found.
arxiv