Browsing by Author "Vega, L."
Now showing items 120 of 42

Absence of eigenvalues of twodimensional magnetic Schr ̈odinger operators
Fanelli, L.; Krejcirik, D.; Vega, L. (20171017)By developing the method of multipliers, we establish sufficient conditions on the electric potential and magnetic field which guarantee that the corresponding twodimensional Schr ̈odinger operator possesses no point ... 
Absence of eigenvalues of twodimensional magnetic Schroedinger operators
Fanelli, L.; Krejcirik, D.; Vega, L. (20180101)By developing the method of multipliers, we establish sufficient conditions on the electric potential and magnetic field which guarantee that the corresponding twodimensional Schroedinger operator possesses no point ... 
An IsoperimetricType Inequality for Electrostatic Shell Interactions for Dirac Operators
Arrizabalaga, N.; Mas, A.; Vega, L. (20160601)In this article we investigate spectral properties of the coupling $H + V_{\lambda}$, where $H =i\alpha \cdot \nabla + m\beta$ is the free Dirac operator in $\mathbb{R}^3$, $m>0$ and $V_{\lambda}$ is an electrostatic shell ... 
Asymptotics in Fourier space of selfsimilar solutions to the modified Kortewegde Vries equation
Correia, S.; Côte, R.; Vega, L. (20180706)We give the asymptotics of the Fourier transform of selfsimilar solutions to the modified Kortewegde Vries equation, through a fixed point argument in weighted $W^{1,\infty}$ around a carefully chosen, two term ansatz. ... 
Asymptotics in Fourier space of selfsimilar solutions to the modified Kortewegde Vries equation
Correia, S.; Côte, R.; Vega, L. (20180706)We give the asymptotics of the Fourier transform of selfsimilar solutions to the modified Kortewegde Vries equation, through a fixed point argument in weighted W1,8 around a carefully chosen, two term ansatz. Such knowledge ... 
Asymptotics in Fourier space of selfsimilar solutions to the modified Kortewegde Vries equation
Correia, S.; Côte, R.; Vega, L. (20200501)We give the asymptotics of the Fourier transform of selfsimilar solutions for the modified Kortewegde Vries equation. In the defocussing case, the selfsimilar profiles are solutions to the Painlevé II equation; although ... 
Bilinear identities involving the $k$plane transform and Fourier extension operators
Beltran, D.; Vega, L. (2019)We prove certain $L^2(\mathbb{R}^n)$ bilinear estimates for Fourier extension operators associated to spheres and hyperboloids under the action of the $k$plane transform. As the estimates are $L^2$based, they follow from ... 
Bilinear identities involving the kplane transform and Fourier extension operators
Beltran, D.; Vega, L. (20191130)We prove certain L2pRnq bilinear estimates for Fourier extension operators associ ated to spheres and hyperboloids under the action of the kplane transform. As the estimates are L2based, they follow from bilinear ... 
Carleman type inequalities for fractional relativistic operators
Stan, D.; Roncal, L.; Vega, L. (20190922)In this paper, we derive Carleman estimates for the fractional relativistic operator. Firstly, we consider changingsign solutions to the heat equation for such operators. We prove monotonicity inequalities and convexity ... 
Erratum to: Relativistic Hardy Inequalities in Magnetic Fields [J Stat Phys, 154, (2014), 866876, DOI 10.1007/s1095501409150]
Fanelli, L.; Vega, L.; Visciglia, N. (20151231)[No abstract available] 
Evolution of Polygonal Lines by the Binormal Flow
Banica, V.; Vega, L. (20200205)The aim of this paper is threefold. First we display solutions of the cubic nonlinear Schr ̈odinger equation on R in link with initial data a sum of Dirac masses. Secondly we show a Talbot effect for the same equation. ... 
Evolution of Polygonal Lines by the Binormal Flow
Banica, V.; Vega, L. (20200601)The aim of this paper is threefold. First we display solutions of the cubic nonlinear Schrödinger equation on R in link with initial data a sum of Dirac masses. Secondly we show a Talbot effect for the same equation. Finally ... 
Hardy uncertainty principle, convexity and parabolic evolutions
Escauriaza, L.; Kenig, C.E.; Ponce, G.; Vega, L. (20160901)We give a new proof of the $L^2$ version of Hardy’s uncertainty principle based on calculus and on its dynamical version for the heat equation. The reasonings rely on new logconvexity properties and the derivation of ... 
A Hardytype inequality and some spectral characterizations for the DiracCoulomb operator
Cassano, B.; Pizzichillo, F.; Vega, L. (20190702)We prove a sharp Hardytype inequality for the Dirac operator. We exploit this inequality to obtain spectral properties of the Dirac operator perturbed with Hermitian matrixvalued potentials V of Coulomb type: we characterise ... 
A Hardytype inequality and some spectral characterizations for the Dirac–Coulomb operator
Cassano, B.; Pizzichillo, F.; Vega, L. (201906)We prove a sharp Hardytype inequality for the Dirac operator. We exploit this inequality to obtain spectral properties of the Dirac operator perturbed with Hermitian matrixvalued potentials $\mathbf V$ of Coulomb type: ... 
A Hardytype inequality and some spectral characterizations for the Dirac–Coulomb operator
Cassano, B.; Pizzichillo, F.; Vega, L. (20200101)We prove a sharp Hardytype inequality for the Dirac operator. We exploit this inequality to obtain spectral properties of the Dirac operator perturbed with Hermitian matrixvalued potentials V of Coulomb type: we characterise ... 
On the energy of critical solutions of the binormal flow
Banica, V.; Vega, L. (20190720)The binormal flow is a model for the dynamics of a vortex filament in a 3D inviscid incompressible fluid. The flow is also related with the classical continuous Heisen berg model in ferromagnetism, and the 1D cubic Schr ... 
On the energy of critical solutions of the binormal flow
Banica, V.; Vega, L. (20200702)The binormal flow is a model for the dynamics of a vortex filament in a 3D inviscid incompressible fluid. The flow is also related with the classical continuous Heisenberg model in ferromagnetism, and the 1D cubic ... 
On the Evolution of the Vortex Filament Equation for regular Mpolygons with nonzero torsion
De la Hoz, F.; Kumar, S.; Vega, L. (20190903)In this paper, we consider the evolution of the Vortex Filament equa tion (VFE): Xt = Xs ∧ Xss, taking Msided regular polygons with nonzero torsion as initial data. Us ing algebraic techniques, backed by numerical ... 
On the improvement of the Hardy inequality due to singular magnetic fields
Fanelli, L.; Krejcirik, D.; Laptev, A.; Vega, L. (20180712)We establish magnetic improvements upon the classical Hardy inequality for two specific choices of singular magnetic fields. First, we consider the AharonovBohm field in all dimensions and establish a sharp Hardytype ...