Numerical simulations of the NLSE (or GPE) are presented demonstrating emission of short pulses o... more Numerical simulations of the NLSE (or GPE) are presented demonstrating emission of short pulses of the matter (light) density formed in the course of tunneling in wave-guided light and/or trapped BEC. The phenomenon is observed under various conditions, for nonlinearities of different signs, zero nonlinearity included. We study, both numerically and analytically, pulsations of matter (light) remaining within the trap and use the results in order to induce emission of sequential pulses by properly narrowing the trap. This allows us to propose a mechanism for a realization of Atom Pulse Laser.
We investigate macroscopic tunneling from an elongated quasi 1-d trap, forming a 'cigar shaped' B... more We investigate macroscopic tunneling from an elongated quasi 1-d trap, forming a 'cigar shaped' BEC. Using recently developed formalism 1 we get the leading analytical approximation for the right hand side of the potential wall, i.e. outside the trap, and a formalism based on Wigner functions, for the left side of the potential wall, i.e. inside the BEC. We then present accomplished results of numerical calculations, which show a 'blip' in the particle density traveling with an asymptotic shock velocity, as resulted from previous works on a dot-like trap, but with significant differences from the latter. Inside the BEC a pattern of a traveling dispersive shock wave is revealed. In the attractive case, we find trains of bright solitons frozen near the boundary.
SEG Technical Program Expanded Abstracts 2016, 2016
We introduce an efficient inverse Q-filter implementation in the full-azimuth angle domain depth ... more We introduce an efficient inverse Q-filter implementation in the full-azimuth angle domain depth migration, referred as the EarthStudy 360 migration, to compensate for seismic wave attenuation and dispersion effects. The filter is realized using Futterman's model, in which these two phenomena are linked by the causality principle. Two implementations are presented and compared: The conventional approach, in which the filter is applied during the migration to the input seismic events; and a novel approach, in which the filter is applied on the seismic events of the multi-dimensional (5D) migrated gathers. Synthetic data results show spectrum enhancement and improved image recovery.
Numerical simulations of the NLSE (or GPE) are presented demonstrating emission of short pulses o... more Numerical simulations of the NLSE (or GPE) are presented demonstrating emission of short pulses of the matter (light) density formed in the course of tunneling in wave-guided light and/or trapped BEC. The phenomenon is observed under various conditions, for nonlinearities of different signs, zero nonlinearity included. We study, both numerically and analytically, pulsations of matter (light) remaining within the trap and use the results in order to induce emission of sequential pulses by properly narrowing the trap. This allows us to propose a mechanism for a realization of Atom Pulse Laser.
We investigate macroscopic tunneling from an elongated quasi 1-d trap, forming a 'cigar shaped' B... more We investigate macroscopic tunneling from an elongated quasi 1-d trap, forming a 'cigar shaped' BEC. Using recently developed formalism 1 we get the leading analytical approximation for the right hand side of the potential wall, i.e. outside the trap, and a formalism based on Wigner functions, for the left side of the potential wall, i.e. inside the BEC. We then present accomplished results of numerical calculations, which show a 'blip' in the particle density traveling with an asymptotic shock velocity, as resulted from previous works on a dot-like trap, but with significant differences from the latter. Inside the BEC a pattern of a traveling dispersive shock wave is revealed. In the attractive case, we find trains of bright solitons frozen near the boundary.
SEG Technical Program Expanded Abstracts 2016, 2016
We introduce an efficient inverse Q-filter implementation in the full-azimuth angle domain depth ... more We introduce an efficient inverse Q-filter implementation in the full-azimuth angle domain depth migration, referred as the EarthStudy 360 migration, to compensate for seismic wave attenuation and dispersion effects. The filter is realized using Futterman's model, in which these two phenomena are linked by the causality principle. Two implementations are presented and compared: The conventional approach, in which the filter is applied during the migration to the input seismic events; and a novel approach, in which the filter is applied on the seismic events of the multi-dimensional (5D) migrated gathers. Synthetic data results show spectrum enhancement and improved image recovery.
Uploads
Papers by Gali Dekel