104 citations · 219 across the 18 of their papers we have counts for
18 papers
Non-local Lagrangian fields: Noether's theorem and Hamiltonian formalism
Carlos Heredia, Josep Llosa
This article aims to study non-local Lagrangians with an infinite number of degrees of freedom. We obtain an extension of Noether's theorem and Noether's identities for such Lagran…
Infinite-derivative linearized gravity in convolutional form
Carlos Heredia, Ivan Kolář, Josep Llosa +2
This article aims to transform the infinite-order Lagrangian density for ghost-free infinite-derivative linearized gravity into non-local. To achieve it, we use the theory of gener…
Non-local Lagrangian Mechanics: Noether theorem and Hamiltonian formalism
Carlos Heredia, Josep Llosa
We study Lagrangian systems with a finite number of degrees of freedom that are non-local in time. We obtain an extension of Noether theorem and Noether identities to this kind of…
Energy-momentum tensor for the electromagnetic field in a dispersive medium as an application of Noether theorem
Carlos Heredia, Josep Llosa
On the basis of a non-local Lagrangian for Maxwell equations in a dispersive medium, the energy-momentum tensor of the field is derived. We obtain the Field equations through varia…
Causality and dielectric functions for linear media with spatial dispersion
Josep Llosa, Francesc Salvat
We extend Kramers-Kronig relations beyond the optical approximation to dielectric functions that depend not only on frequency but on the wave number as well. This implies extending…
On the Bell's spaceships paradox and proper length for accelerated bodies
Jesús Ceresuela, Josep Llosa
We study the Dewan-Beran-Bell thought experiment of two spaceships connected by a thread that start accelerated motion and discuss the proper length of the thread by means of Born'…