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Semiclassical description of quantum perturbations
quantum perturbations Semiclassical description local density of states
2010/4/8
The effect of a perturbation over a quantum system is described by the local density of states (LDOS), a distribution of the overlaps square between the unperturbed and perturbed eigenstates. Its witd...
Climate model attractors:chaos,quasi-regularity and sensitivity to small perturbations of external forcing
Climate model attractors chaos quasi-regularity sensitivity small perturbations external forcing
2009/11/12
In this paper we discuss some theoretical results obtained for climate models (theorems for the existence of global attractors and inertial manifolds, estimates of attractor dimension and Lyapunov exp...
Evolution of localized vortices in the presence of stochastic perturbations
Evolution of localized vortices presence of stochastic perturbations
2009/11/9
We consider the evolution of a distribution of N identical point vortices when stochastic perturbations in the Hamiltonian are present. It is shown that different initial configurations of vorticity w...
Nonlinear instability and sensitivity of a theoretical grassland ecosystem to finite-amplitude perturbations
Nonlinear instability theoretical grassland ecosystem finite-amplitude perturbations
2009/11/3
Within a theoretical model context, the sensitivity and instability of the grassland ecosystem to finite-amplitude perturbations are studied. A new approach of conditional nonlinear optimal perturbati...
Initial state perturbations in ensemble forecasting
Initial state perturbations ensemble forecasting
2009/11/2
Due to the chaotic nature of atmospheric dynamics, numerical weather prediction systems are sensitive to errors in the initial conditions. To estimate the forecast uncertainty, forecast centres produc...
Conditional nonlinear optimal perturbations of the double-gyre ocean circulation
Conditional nonlinear optimal perturbations double-gyre ocean circulation
2009/11/2
In this paper, we study the development of finite amplitude perturbations on linearly stable steady barotropic double-gyre flows in a rectangular basin using the concept of Conditional Nonlinear Optim...
EVOLUTION OF DENSITY PERTURBATIONS IN A CYLINDRICAL MOLECULAR CLOUD USING SMOOTHED PARTICLE HYDRODYNAMICS
ISM: clouds evolution ISM: magnetic fields Stars: formation Methods: numerical
2010/10/29
Molecular clouds have a hierarchical structure from few tens of
parsecs for giants to few tenth of a parsec for proto-stellar cores. Nowadays, our
observational techniques are so advanced that it ha...
Effect of Perturbations in Coriolis and Centrifugal Forces on the Nonlinear Stability of Equilibrium Point in Robe's Restricted Circular Three-Body Problem
Perturbations Centrifugal Forces Coriolis three-body problem
2009/9/4
The effect of perturbations in Coriolis and cetrifugal forces on the nonlinear stability of the equilibrium point of the Robe's (1977) restricted circular three-body problem has been studied when the ...
Perturbations by Mass Loss in the Orbital Elements of Persei and Centauri
Mass Loss Persei Centauri Orbital Elements
2009/6/9
Perturbations by Mass Loss in the Orbital Elements of Persei and Centauri。
Azimuthal field perturbations in the jovian magnetosphere：ulysses observations
jovian magnetosphere ulysses observations Azimuthal field perturbations
2009/6/4
Azimuthal field perturbations in the jovian magnetosphere：ulysses observations。
Transient Perturbations and their Effects in the Heliosphere, the Geomagnetosphere, and the Earth’s Atmosphere：Space Weather Perspective
Space weather geomagnetic storm cosmic ray Forbush decrease interplanetary shock coronal mass ejection
2009/5/7
We discuss the effects of certain dynamic features of space environment in the heliosphere, the geo-magnetosphere, and the earth™s atmosphere. In particular, transient perturbations in solar win...
SCALE HEIGHTS FOR THE AERONOMICAL MODELS AND PERTURBATIONS OF SATELLITE ORBITS
SCALE HEIGHTS SATELLITE ORBITS THE AERONOMICAL MODELS
2009/4/21
SCALE HEIGHTS FOR THE AERONOMICAL MODELS AND PERTURBATIONS OF SATELLITE ORBITS。
Uniqueness of smooth stationary black holes in vacuum: small perturbations of Kerr
Kerr smooth stationary black holes in vacuum
2014/4/3
In collaboration with S. Alexakis and A. Ionescu we show that smooth, asymptotically flat, non-degenerate solutions of the Einstein vacuum equations, which are suuficiently close to a Kerr solution, i...
Spectra of North Pacific Temperature and Salinity Perturbations in the Depth Domain
North Pacific Temperature Depth Domain Salinity Perturbations
2009/3/9
In the central North Pacific, temperature and salinity depth profiles show considerable fine structure, the features of which are most pronounced in the thermocline and halocline, as well as near wate...
Stationary and Traveling Mesoscale Perturbations in the Kuroshio Extension Current
Mesoscale Perturbations Kuroshio Extension Current
2009/2/9
Several hundred XBT observations in the western North Pacific were collected each month over a 2½ year period 1976–78. They have been assembled into a monthly map sequence of thermocline temper...