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13 papers · 1 filter
An Information-theoretic Approach to Machine-oriented Music Summarization
Francisco Raposo, David Martins de Matos, Ricardo Ribeiro
Music summarization allows for higher efficiency in processing, storage, and sharing of datasets. Machine-oriented approaches, being agnostic to human consumption, optimize these a…
High orbital angular momentum harmonic generation
J. Vieira, R. M. G. M. Trines, E. P. Alves +5
We identify and explore a high orbital angular momentum (OAM) harmonics generation and amplification mechanism that manipulates the OAM independently of any other laser property, b…
Electron - positron cascades in multiple-laser optical traps
Marija Vranic, Thomas Grismayer, Ricardo A. Fonseca +1
We present an analytical and numerical study of multiple-laser QED cascades induced with linearly polarised laser pulses. We analyse different polarisation orientations and propose…
Quantum Electrodynamics vacuum polarization solver
Thomas Grismayer, Rui Torres, Pedro Carneiro +3
The self-consistent modeling of vacuum polarization due to virtual electron-positron fluctuations is of relevance for many near term experiments associated with high intensity radi…
Multidimensional Plasma Wake Excitation in the Non-linear Blowout Regime
J. Vieira, R. A. Fonseca, L. O. Silva
Plasma accelerators can sustain very high acceleration gradients. They are promising candidates for future generations of particle accelerators for several scientific, medical and…
Bounded energy waves on the black hole interior of Reissner-Nordström-de Sitter
João L. Costa, Anne T. Franzen
Motivated by the Strong Cosmic Censorship Conjecture, in the presence of a cosmological constant, we consider solutions of the scalar wave equation on fixed subextremal…