搜索结果: 1-15 共查到“Inhomogeneities”相关记录15条 . 查询时间(0.046 秒)
Trapped bright matter-wave solitons in the presence of localized inhomogeneities
Solitary wave dynamics condensate power soliton dynamics
2014/12/25
We examine the dynamics of a bright solitary wave in the presence of a repulsive or attractive localized “impurity” in Bose–Einstein condensates (BECs). We study the generation and stability of a pair...
Matter-wave solitons in the presence of collisional inhomogeneities: Perturbation theory and the impact of derivative terms
Dynamic soliton atomic scattering length nonlinear dynamic
2014/12/24
We investigate the dynamics of matter-wave solitons in the presence of a spatially varying atomic scattering length and nonlinearity. The dynamics of bright and dark solitary waves is studied using th...
Stability and dynamics of matter-wave vortices in the presence of collisional inhomogeneities and dissipative perturbations
Spectral properties vortex bose-einstein condensate harmonic trap negative energy pattern precession vortex power trap
2014/12/24
In this work, the spectral properties of a singly charged vortex in a Bose–Einstein condensate confined in a highly anisotropic (disc-shaped) harmonic trap are investigated. Special emphasis is placed...
Magnetized LambdaCDM inhomogeneities and the cosmic dark ages
Magnetized inhomogeneities cosmic dark ages
2011/10/13
Exact solutions of the perturbations equations in the magnetized LambdaCDM scenario are presented. They apply during the dark ages and, more specifically, after the baryons are freed from the drag of ...
Redshift and distances in a ΛCDM cosmology with non-linear inhomogeneities
cosmology: theory, relativity, large-scale structure of Universe, super- novae: general
2011/10/13
In this paper we study the effects of inhomogeneities on light propagation in a flat {\Lambda}CDM background. To this end we use exact solutions of Einstein's equations (Meures & Bruni 2011) where, st...
Average Inhomogeneities in Milky Way SNII and The PAMELA Anomaly
PAMELA Anomaly Supernova Remnant
2011/9/29
A model is presented to estimate the fraction of Supernova Type-II events (SNII) occurring inside vs. outside a spiral arm for a given star formation episode. The probability distribution function (PD...
Inhomogeneities in molecular layers of Mira atmospheres
Techniques: interferometric – Techniques: photometric – Stars: AGB and post-AGB – Stars: atmospheres – Stars: fun- damental parameters – Stars: mass-loss
2011/9/28
We obtained K-band spectro-interferometric observations of the Miras R Cnc, X Hya, W Vel, and RW Vel with a spectral resolution of 1500 using the VLTI/AMBER instrument. We obtained concurrent JHKL pho...
Scattering by many small inhomogeneities and applications
wave scattering by small inhomogeneities metamaterials nanotechnology
2011/1/21
Many-body quantum-mechanical scattering problem is solved asymptotically when the size of the scatterers (inhomogeneities) tends to zero and their number tends to infinity.
The influence of inhomogeneities on the large-scale expansion of the universe
the large-scale expansion universe
2010/12/27
The evolution of an inhomogeneous universe composed entirely of matter is followed from an early, nearly uniform state until the time when the inhomogeneities have begun to grow large. The particular...
A new framework for analyzing the effects of small scale inhomogeneities in cosmology
new framework effects of small scale inhomogeneities cosmology
2010/12/20
We develop a new, mathematically precise framework for treating the effects of nonlinear phe-
nomena occurring on small scales in general relativity. Our approach is an adaptation of Burnett’s formul...
On selection criteria for problems with moving inhomogeneities
selection criteria moving inhomogeneities
2010/11/24
We study mechanical problems with multiple solutions and introduce a thermodynamic framework to formulate two different selection criteria in terms of macroscopic energy productions and fluxes. Study...
The influence of inhomogeneities on the large-scale expansion of the universe
influence of inhomogeneities large-scale expansion of the universe
2010/11/12
The evolution of an inhomogeneous universe composed entirely of matter is followed from an early, nearly uniform state until the time when the inhomogeneities have begun to grow large. The particular ...
On the effect of random inhomogeneities in Kerr-media modelled by non-linear Schrodinger equation
Kerr-media modelled non-linear Schrodinger equation
2010/4/6
We consider propagation of optical pulses under the interplay of dispersion and Kerr non-linearity in optical fibres with impurities distributed at random uniformly on the fibre. By using a model base...
Observations Inhomogeneities and Detection of Climate Change
Climatological time series homogenization sequential statistical analysis change-point search joint significance levels climate evolution
2009/6/10
It is now well known that inhomogeneities in observations and climate instability have the
common statistical property of producing generally in climatological series abrupt changes in the distributi...
The Influence of Horizontal Inhomogeneities on the Propagation of High-Frequency Linear Internal Gravity Waves across a Baroclinic Flow
Horizontal Inhomogeneities Baroclinic Flow Linear Internal Gravity Waves
2008/12/22
The effect of the inclusion of the horizontal gradients of background density and baroclinic flow on the propagation of linear internal gravity wave packets across the flow is investigated using ray-t...