Results 71 to 80 of about 87,432 (237)
From Stability to Chaos: A Complete Classification of the Damped Klein‐Gordon Dynamics
Mathematical Methods in the Applied Sciences, EarlyView.ABSTRACT We investigate the transition between stability and chaos in the damped Klein‐Gordon equation, a fundamental model for wave propagation and energy dissipation. Using semigroup methods and spectral criteria, we derive explicit thresholds that determine when the system exhibits asymptotic stability and when it displays strong chaotic dynamics ...
Carlos Lizama +2 more
wiley +1 more source
A Relativistic Coupled-Channel Formalism for the Pion Form Factor
EPJ Web of Conferences, 2010 The electromagnetic form factor of a confined quark-antiquark pair is calculated within the framework of point-form relativistic quantum mechanics. The dynamics of the exchanged photon is explicitly taken into account by treating the electromagnetic ...
Klink W.H. +3 more
doaj +1 more source
Solar RRL, EarlyView.This study investigates the effect of the chemical composition on the properties of A(BB’)(XX’)3$_3$ inorganic halide perovskites with density functional theory. By correlating distortion amplitudes with both composition and the Goldschmidt tolerance factor, we propose a pragmatic approach to designing more stable and efficient perovskites, advancing ...
Antoine Gissler +2 more
wiley +1 more source
The Relativistic Three-Body Bound State in Three-Dimensions
EPJ Web of Conferences, 2016 Studying of the relativistic three-body bound state in a three-dimensional (3D) approach is a necessary first step in a process to eventually perform scattering calculations at GeV energies, where partial-wave expansions are not useful.
Hadizadeh M. R. +2 more
doaj +1 more source
Noûs, EarlyView.ABSTRACT How should we understand the duration of a pleasant or unpleasant sensation, insofar as its duration modulates how good or bad the experience is overall? Given that we seem able to distinguish between subjective and objective duration and that how well or badly someone's life goes is naturally thought of as something to be assessed from her ...
Andreas L. Mogensen
wiley +1 more source
Direct observation of zitterbewegung in a Bose–Einstein condensate
New Journal of Physics, 2013 Zitterbewegung, a force-free trembling motion first predicted for relativistic fermions like electrons, was an unexpected consequence of the Dirac equation's unification of quantum mechanics and special relativity.
L J LeBlanc +6 more
doaj +1 more source
Anselm's Temporal‐Ontological Proof
Noûs, EarlyView.ABSTRACT In his Reply to Gaunilo, Anselm presented two additional arguments for the existence of God beyond those that appear in the Proslogion. In “The Logical Structure of Anselm's Argument,” Robert M. Adams isolates each. One, he develops into a modal ontological argument along the lines of other 20th century ontological arguments (e.g., those of ...
Daniel Rubio
wiley +1 more source
The cardiac pacemakers: A paradigm of robustness in evolutionary biology
The Journal of Physiology, EarlyView.Abstract figure legend Functional networks in living systems are formed by many thousands of gene products. In association with those networks, several genes (four in this diagram) may be sufficient, each on its own, to ensure that the function occurs. Any one of these may be removed or blocked while leaving the others to continue functioning.
Denis Noble
wiley +1 more source
Derivation of Dirac equation from the stochastic optimal control principles of quantum mechanics
Scientific ReportsIn this paper, we present a stochastic approach to relativistic quantum mechanics. We formulate the three fundamental principles of this theory and derive the Dirac equations based on them.
Vasil Yordanov
doaj +1 more source
Unitarity constrains the quantum information metrics for particle interactions
Nuclear Physics BUnitarity provides mathematical and physical constraints on quantum information systems. e.g., in entanglement swapping, unitarity requires the same von Neumann entanglement entropy generation for either a particle interaction or an act of measurement ...
Shanmuka Shivashankara, Hobbes Sprague
doaj +1 more source