Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Trueba, J. L."'
We present the calculation of the stability region of a perfect diamagnet levitated in a magnetic field created by a circular current loop. We make use of the machine learning technique of automatic differentiation to illustrate the calculations with
Externí odkaz:
http://arxiv.org/abs/2111.07689
Autor:
Guénault, A. M., Guthrie, A., Haley, R. P., Kafanov, S., Pashkin, Yu. A., Pickett, G. R., Tsepelin, V., Zmeev, D. E., Collin, E., Gazizulin, R., Maillet, O., Arrayás, M., Trueba, J. L.
We report on nanomechanical resonators with very high-quality factors operated as mechanical probes in liquid helium \(^4\mathrm{He}\), with special attention to the superfluid regime down to millikelvin temperatures. Such resonators have been used t
Externí odkaz:
http://arxiv.org/abs/1810.10129
Autor:
Arrayás, M., Trueba, J. L.
Publikováno v:
European Journal of Physics 40, 015205 (2019)
The Fourier transform method can be applied to obtain electromagnetic knots, which are solutions of Maxwell equations in vacuum with non-trivial topology of the field lines and especial properties. The program followed in this work allows to present
Externí odkaz:
http://arxiv.org/abs/1809.04869
Autor:
Arrayás, M, Trueba, J L
Publikováno v:
Symmetry 10, 88 (2018)
We calculate analytically the spin-orbital decomposition of the angular momentum using completely non-paraxial fields that have certain degree of linkage of electric and magnetic lines. The split of the angular momentum into spin-orbital components i
Externí odkaz:
http://arxiv.org/abs/1709.01506
Autor:
Arrayás, M., Trueba, J. L.
Publikováno v:
2017 J. Phys. A: Math. Theor. 50 085203
We study the collision of two hopfions or Hopf-Ra\~nada electromagnetic fields. The superposition of two of such fields, travelling in opposite directions, yields different topology for the electric and magnetic field lines. Controlling the angular m
Externí odkaz:
http://arxiv.org/abs/1610.06014
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics 172, 69-74 (2018)
Intense electromagnetic pulses interacting with a plasma can create a wake of plasma oscillations. Electrons trapped in such oscillations can be accelerated under certain conditions to very high energies. We study the conditions for the wakefield acc
Externí odkaz:
http://arxiv.org/abs/1506.07072
Autor:
Arrayás, M., Trueba, J. L.
Publikováno v:
J.Phys.A43:235401,2010
In this paper we consider the classical relativistic motion of charged particles in a knotted electromagnetic field. After reviewing how to construct electromagnetic knots from maps between the three-sphere and the two-sphere, we introduce a mean qua
Externí odkaz:
http://arxiv.org/abs/1001.4985
In this paper we study the effects of photoionization processes on the propagation of both negative and positive streamer discharges. We show that negative fronts accelerate in the presence of photoionization events. The appearance and propagation of
Externí odkaz:
http://arxiv.org/abs/physics/0608147
We explain a mechanism for branching of a planar negative front. Branching occurs as the result of a balance between the destabilizing effect of impact ionization and the stabilizing effect of electron diffusion on ionization fronts. The dispersion r
Externí odkaz:
http://arxiv.org/abs/physics/0505129
It has been long admitted that a consequence of the virial theorem is that there can be no equilibrium configurations of a system of charges in electromagnetic interaction in the absence of external forces. However, recent results have shown that the
Externí odkaz:
http://arxiv.org/abs/physics/0312122