Now showing items 1-10 of 13
Theoretical studies of the generation, detection and application of massively entangled states of Bose condensed atoms
(Georgia Institute of Technology, 2004-04-01)
Mach cone in a shallow granular fluid
(Georgia Institute of Technology, 2004-12-23)
We study the V-shaped wake (Mach cone) formed by a cylindrical rod moving through a thin, vertically vibrated granular layer. The wake, analogous to a shock (hydraulic jump) in shallow water, appears for rod velocities vR ...
Noise, coherent fluctuations, and the onset of order in an oscillated granular fluid
(Georgia Institute of Technology, 2004-04-30)
We study fluctuations in a vertically oscillated layer of grains below the critical acceleration for the onset of ordered standing waves. As onset is approached, transient disordered waves with a characteristic length scale ...
Dynamics of drag and force distributions for projectile impact in a granular medium
(Georgia Institute of Technology, 2004-05-14)
Our experiments and molecular dynamics simulations on a projectile penetrating a two-dimensional granular medium reveal that the mean deceleration of the projectile is constant and proportional to the impact velocity. Thus, ...
Persistent holes in a fluid
(Georgia Institute of Technology, 2004-05-07)
We observe stable holes in a vertically oscillated 0.5 cm deep aqueous suspension of cornstarch. Holes appear only if a finite perturbation is applied to the layer for accelerations α above 10g. Holes are circular and ...
Crucial role of sidewalls in velocity distributions in quasi-two-dimensional granular gases
(Georgia Institute of Technology, 2004-10-19)
Our experiments and three-dimensional molecular dynamics simulations of particles confined to a vertical monolayer by closely spaced frictional walls (sidewalls) yield velocity distributions with non-Gaussian tails and a ...
Measuring Ultracomplex Supercontinuum Pulses and Spatio-Temporal Distortions
(Georgia Institute of Technology, 2004-07-12)
This thesis contains two components of research: studies of supercontinuum pulses generated in the novel microstructure fiber, and research on spatio-temporal coupling in ultrafast laser beams. One of the most exciting ...
Regular Quantum Dynamics
(Georgia Institute of Technology, 2004-12-01)
The ill-posed problem of quantizing space-time is replaced by a more determined and well-posed problem of regularizing quantum dynamics. The problem is then to eliminate the Heisenberg singularity from quantum mechanics ...
Dynamical systems approach to one-dimensional spatiotemporal chaos -- A cyclist's view
(Georgia Institute of Technology, 2004-11-19)
We propose a dynamical systems approach to the study of weak turbulence(spatiotemporal chaos) based on the periodic orbit theory, emphasizing the role of recurrent patterns and coherent structures. After a brief review ...
Limits of Localized Control in Extended Nonlinear Systems
(Georgia Institute of Technology, 2004-07-08)
We investigate the limits of localized linear control in spatially extended, nonlinear systems. Spatially extended, nonlinear systems can be found in virtually every field of engineering and science. An important ...