Zobrazeno 1 - 10
of 266
pro vyhledávání: '"Bergamin, L."'
Autor:
Romano, E., Bergamin, L., Berto, D., Chiocci, F.L., Miccadei, E., Paglia, G., Piattelli, V., Pierfranceschi, G., Rampazzo, F., Sorci, A., Taddei Ruggiero, E.
Publikováno v:
In Marine Geology January 2023 455
In this paper we find a realization for the D'B'-boundary conditions, which imposes vanishing normal derivatives of the normal components of the D and B fields. The implementation of the DB boundary, requiring vanishing normal components of D and B,
Externí odkaz:
http://arxiv.org/abs/1103.3931
Autor:
Bergamin, L.
Negative index of refraction has become an accepted part of transformation optics, which is encountered in transformations that change the orientation of the manifold. Based on this concept, various designs of perfect lenses have been proposed, which
Externí odkaz:
http://arxiv.org/abs/0912.2649
Autor:
Bergamin, L.
Publikováno v:
Phys.Rev. A80 (2009) 063835
In this paper the interface between two transformation media or between a transformation medium and vacuum is studied. Strictly from the transformation optics point of view the consequences of the boundary conditions at such interfaces are addressed
Externí odkaz:
http://arxiv.org/abs/0903.1821
Publikováno v:
Class.Quant.Grav.26:185006,2009
In this paper the effects of vibrations at high frequencies onto a freely falling two-body system in Schwarzschild spacetime are investigated. As reference motion of the same system without vibrations a circular orbit around the central body is consi
Externí odkaz:
http://arxiv.org/abs/0901.2306
In this paper we analyze some aspects of the "relativistic glider" proposed by Gu\'eron and Mosna more in detail. In particular an explicit weak gravity and low velocity expansion is presented, the influence of different initial conditions are studie
Externí odkaz:
http://arxiv.org/abs/0901.2298
Autor:
Bergamin, L.
Publikováno v:
Phys. Rev. A78, 043825, 2008
In this paper various extensions of the design strategy of transformation media are proposed. We show that it is possible to assign different transformed spaces to the field strength tensor (electric field and magnetic induction) and to the excitatio
Externí odkaz:
http://arxiv.org/abs/0807.0186
Autor:
Bergamin, L., Grumiller, D.
We discuss 2D dilaton supergravity in the presence of boundaries. Generic ones lead to results different from black hole horizon boundaries. In particular, the respective numbers of physical degrees of freedom differ, thus generalizing the bosonic re
Externí odkaz:
http://arxiv.org/abs/hep-th/0701196
We critically review our recent claims that it is possible to obtain a propellantless propulsion device similar to electrodynamic tethers by means of a closed wire partially shielded by a superconductor from the outer magnetic field. We find that suc
Externí odkaz:
http://arxiv.org/abs/physics/0612132
Autor:
Bergamin, L., Grumiller, D.
Publikováno v:
Int.J.Mod.Phys.D15:2279-2284,2006
Frequently it is argued that the microstates responsible for the Bekenstein-Hawking entropy should arise from some physical degrees of freedom located near or on the black hole horizon. In this Essay we elucidate that instead entropy may emerge from
Externí odkaz:
http://arxiv.org/abs/gr-qc/0605148