Results 51 to 60 of about 7,348,255 (319)
Frontiers in Physiology, 2022 Background and Objective: Renewal theory is a statistical approach to model the formation and destruction of phase singularities (PS), which occur at the pivots of spiral waves.
Evan V. Jenkins +18 more
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Formulation of the twisted-light-matter interaction at the phase singularity: Beams with strong magnetic fields [PDF]
, 2016 The formulation of the interaction of matter with singular light fields needs special care. In a recent article [Phys.~Rev.~A {\bf 91}, 033808 (2015)] we have shown that the Hamiltonian describing the interaction of a twisted light beam having parallel ...
G. Quinteiro, D. Reiter, T. Kuhn
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Critical points and symmetries of a free energy function for biaxial nematic liquid crystals [PDF]
, 2015 We describe a general mean field model for the free energy function for a homogeneous medium of mutually interacting molecules, based on the formalism for a biaxial nematic liquid crystal set out by Katriel et al (1986) in an influential paper in Liquid ...
Chillingworth, David +2 more
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Thermodynamic phase transitions and shock singularities [PDF]
Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2011 We show that, under rather general assumptions on the form of the entropy function, the energy balance equation for a system in thermodynamic equilibrium is equivalent to a set of nonlinear equations of hydrodynamic type. This set of equations is integrable via the method of characteristics and it provides the equation of state for the gas.
de Nittis, Giuseppe, Moro, Antonio
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Observation of an exceptional point in a non-Hermitian metasurface
Nanophotonics, 2020 Exceptional points (EPs), also known as non-Hermitian degeneracies, have been observed in parity-time symmetric metasurfaces as parity-time symmetry breaking points.
Park Sang Hyun +8 more
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Observation of robust subwavelength phase singularity in chiral medium
Advanced Photonics. Photonic devices that exhibit both sensitivity and robustness have long been sought; yet, these characteristics are thought to be mutually exclusive; through sensitivity, a sensor responds to external stimuli, whereas robustness embodies the inherent ...
Junhee Park +6 more
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Regularity for the two‐phase singular perturbation problems [PDF]
Proceedings of the London Mathematical Society, 2021 We prove that an a priori BMO gradient estimate for the two phase singular perturbation problem implies Lipschitz regularity for the limits. This problem arises in the mathematical theory of combustion where the reaction-diffusion is modelled by the $p$-Laplacian. A key tool in our approach is the weak energy identity.
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Shock dynamics of phase diagrams
, 2014 A thermodynamic phase transition denotes a drastic change of state of a physical system due to a continuous change of thermodynamic variables, as for instance pressure and temperature.
Moro, Antonio
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Phase singularities for image representation and matching [PDF]
2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008 Phase features are widely used in image processing and representation due to their stability to deformation and noise. However, phase singularities,where the signals vanish, are generally regarded as harmful and unreliable facts. In this paper, on the contrary, we will show that phase singularities calculated by Laguerre-Gauss filter contain important ...
Yu Qiao 0001 +4 more
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Spin angular momentum density in the tight focus of a light field with phase and polarization singularities [PDF]
Компьютерная оптика, 2019 For a light field with both phase and polarization singularities at its center, expressions are obtained that describe the distribution of the spin angular momentum (SAM) density in the sharp focal spot of an aplanatic system.
Alexey Kovalev +2 more
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