Results 21 to 30 of about 76,709 (184)

Dirac solitons in optical microresonators

open access: yesLight: Science & Applications, 2020
Dirac solitons: Equation describes new properties The intriguing properties of a new type of ultrashort light pulse in microresonators are described. Called a Dirac soliton, Heming Wang and colleagues at the California Institute of Technology say that ...
Heming Wang   +6 more
doaj   +1 more source

Block-diagonalization of the linearized coupled-mode system [PDF]

open access: yes, 2005
We consider the Hamiltonian coupled-mode system that occur in nonlinear optics, photonics, and atomic physics. Spectral stability of gap solitons is determined by eigenvalues of the linearized coupled-mode system, which is equivalent to a four-by-four ...
Chugunova, M., Pelinovsky, D.
core   +2 more sources

Stable directions for small nonlinear Dirac standing waves [PDF]

open access: yes, 2006
We prove that for a Dirac operator with no resonance at thresholds nor eigenvalue at thresholds the propagator satisfies propagation and dispersive estimates.
A. Alvarez   +48 more
core   +2 more sources

Solutions of nonlinear Dirac equations

open access: yesJournal 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
openaire   +2 more sources

CONSTRUCTION OF CONSERVATION LAWS FOR NONLINEAR EQUATIONS CONNECTED WITH THE DIRAC SCATTERING OPERATOR

open access: yesНаука. Инновации. Технологии, 2022
Introduction: the problem of integrability of nonlinear partial differential equations, even for the second order, is not always an obvious fact, since inding a general solution is possible only in rare cases.
Tatyana Valentinovna Redkina
doaj  

On the GBDT version of the B\"acklund-Darboux transformation and its applications to the linear and nonlinear equations and Weyl theory [PDF]

open access: yes, 2009
A general theorem on the GBDT version of the B\"acklund-Darboux transformation for systems rationally depending on the spectral parameter is treated and its applications to nonlinear equations are given.
Sakhnovich, Alexander
core   +2 more sources

The cubic nonlinear Dirac equation [PDF]

open access: yesJournées équations aux dérivées partielles, 2013
We present some results obtained in collaboration with prof. Piero D’Ancona concerning global existence for the 3D cubic non linear massless Dirac equation with a potential for small initial data in H 1 with slight additional assumptions. The new crucial tool is given by the proof of some refined endpoint Strichartz estimates.
openaire   +2 more sources

Nonlinear Wave Equations Related to Nonextensive Thermostatistics

open access: yesEntropy, 2017
We advance two nonlinear wave equations related to the nonextensive thermostatistical formalism based upon the power-law nonadditive S q entropies.
Angel R. Plastino, Roseli S. Wedemann
doaj   +1 more source

Quantum Maps with Memory from Generalized Lindblad Equation

open access: yesEntropy, 2021
In this paper, we proposed the exactly solvable model of non-Markovian dynamics of open quantum systems. This model describes open quantum systems with memory and periodic sequence of kicks by environment. To describe these systems, the Lindblad equation
Vasily E. Tarasov
doaj   +1 more source

The nonlinear Dirac equation in Bose–Einstein condensates: superfluid fluctuations and emergent theories from relativistic linear stability equations

open access: yesNew Journal of Physics, 2015
We present the theoretical and mathematical foundations of stability analysis for a Bose–Einstein condensate (BEC) at Dirac points of a honeycomb optical lattice. The combination of s -wave scattering for bosons and lattice interaction places constraints
L H Haddad, Lincoln D Carr
doaj   +1 more source

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