Results 51 to 60 of about 2,003,558 (249)
International Journal of Mathematics and Mathematical Sciences, 2004 We obtain optical vortices with classical orbital momentum ℓ=1 and spin j=±1/2 as exact solutions of a system of nonlinear Maxwell equations (NMEs). Two kinds of Kerr-type media, namely, those with and without linear dispersion of the electric and the ...
Lubomir M. Kovachev
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Effective quantum dynamics for magnetic fermions [PDF]
Open Communications in Nonlinear Mathematical PhysicsWe show how to derive an effective nonlinear dynamics, described by the Hartree-Fock equations, for fermionic quantum particles confined to a two-dimensional box and in presence of an external, uniform magnetic field.
Margherita Ferrero, Domenico Monaco
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Solutions of nonlinear Dirac equations
Journal of Differential Equations, 2006 Existence and multiplicity results for stationary solutions of the Dirac equation \(-i\partial _{t}\psi =ic\hslash \sum_{k=1}^{3}a_{k}\partial _{k}\psi -mc^{2}\beta \psi +\nabla _{\psi }G(x,\psi )\) are established via variational method. The associated Lagrangian functional is strongly indefinite and the Palais-Smale (PS) condition is not satisfied ...
Bartsch, Thomas, Ding, Yanheng
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Moiré‐Induced Symmetry Breaking of Charge Order in van der Waals Heterostructures
Advanced Materials, EarlyView.A uniaxial moiré potential in misfit (MS)1+δTaS2 heterostructures selectively reshape charge order: the embedded 1H‐TaS2 layer hosts an incommensurate charge‐density wave, fragmented into nanometer domains and stripped of threefold symmetry. Superconductivity, however, remains uniform and fully gapped, revealing heterosymmetry stacking as a selective ...
Sandra Sajan +12 more
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Advanced Science, EarlyView.First‐principles calculations reveal that monolayer In2O${\rm In}_2{\rm O}$ hosts type‐II Dirac fermions near the Fermi level, which split into Weyl points under spin‐orbit coupling. The material exhibits negative and giant magnetoresistance, a pronounced spin Hall effect, and phonon‐mediated superconductivity at 1.5 K, establishing it as a unique ...
Qing‐Bo Liu +6 more
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Electronic response of graphene to an ultrashort intense terahertz radiation pulse
New Journal of Physics, 2013 We have recently reported a study (Ishikawa 2010 Phys. Rev. B 82 201402) on a nonlinear optical response of graphene to a normally incident terahertz radiation pulse within the massless Dirac fermion (MDF) picture, where we have derived physically ...
Kenichi L Ishikawa
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Nonrelativistic open string and Yang-Mills theory
Journal of High Energy Physics, 2021 The classical and quantum worldsheet theory describing nonrelativistic open string theory in an arbitrary nonrelativistic open and closed string background is constructed.
Jaume Gomis, Ziqi Yan, Matthew Yu
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Giant Bulk Photovoltaic Effect in Two‐Dimensional Topological Ferroelectric Semimetal
Advanced Science, EarlyView.ABSTRACT Ferroelectric (FE) metals have attracted growing interest because they combine ferroelectricity with metallic behavior and enable polarization‐controlled band topology near the Fermi level. However, the number of known ferroelectric metals is still limited.
Jianhua Wang +8 more
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Dequantization of the Dirac monopole [PDF]
, 2009 Copyright © 2009 The Royal Society. This is the author's final version of the article. The final publication is available from the link below.Using a sheaf-theoretic extension of conventional principal bundle theory, the Dirac monopole is formulated as a
Brody, DC
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Alexandria Engineering JournalThis research looked at nonlinear ordinary differential equations with global differential operators and the Dirac-delta and exponential decay kernels.
Abdon Atangana, Seda Igret Araz
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