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Stationary state volume fluctuations in a granular medium
(Georgia Institute of Technology, 2005-03-30)
A statistical description of static granular material requires ergodic sampling of the phase space spanned by the different configurations of the particles. We periodically fluidize a column of glass beads and find that ...
Robotics in Scansorial Environments
(Georgia Institute of Technology, 2005)
Spin Valve Effect in Ferromagnet-Superconductor-Ferromagnet Single Electron Transistor
(Georgia Institute of Technology, 2005-03-30)
This thesis describes a research of suppression of superconducting gap in a superconducting island of a Ferromagnetic-Superconducting-Ferromagnetic Single-Electron-Transistor due to the fringing magnetic fields produced ...
Extending ultrashort-laser-pulse measurement techniques to new dimensions, time scales, and frequencies
(Georgia Institute of Technology, 2005-04-08)
In the last decade, there has been tremendous progress in the field of ultrashort-pulse measurement. However, this effort has focused mostly on the temporal behavior of 100-fs, 800-nm ultrashort pulse, ignoring other pulse ...
Measuring broadband, ultraweak, ultrashort pulses
(Georgia Institute of Technology, 2005-07-14)
Many essential processes and interactions on atomic and molecular scales occur at ultrafast timescales. The ability to measure and manipulate ultrashort pulses hold the key to probing and understanding these key processes ...
Next Generation Ultrashort-Pulse Retrieval Algorithm for Frequency-Resolved Optical Gating: The Inclusion of Random (Noise) and Nonrandom (Spatio-Temporal Pulse Distortions) Error
(Georgia Institute of Technology, 2005-04-14)
A new pulse-retrieval software for Frequency-Resolved Optical Gating (FROG) technique has been developed. The new software extends the capacity of the original FROG algorithm in two major categories. First is a new method ...
BCS-to-BEC Quantum Phase Transition in High-Tc Superconductors and Fermionic Atomic Gases: A Functional Integral Approach
(Georgia Institute of Technology, 2005-09-12)
The problem of the evolution from BCS theory with cooperative Cooper pairing to the formation and condensation of composite bosons has attracted considerable attention for the past several decades. It has gained renewed ...
Spin-1 atomic condensates in magnetic fields
(Georgia Institute of Technology, 2005-09-22)
In this thesis we investigate the static, dynamic, and thermodynamic properties
of atomic spin-1 Bose gases in external magnetic fields. At low magnetic fields
the properties of single-component, or scalar condensates, ...
Spontaneous Synchronization of Josephson Junctions and Fiber Lasers
(Georgia Institute of Technology, 2005-07-20)
The thesis is devoted to the study of spontaneous synchronization of coupled nonlinear oscillators. It consists of two major parts. The first describes synchronization of Josephson junctions embedded in a transmission ...
Characterizations of spatio-temporal complex systems
(Georgia Institute of Technology, 2005-05-20)
The thesis develops two characterizations of spatio-temporal complex patterns. While these are developed for the patterns of fluid flow in experiments on Rayleigh-Benard Convection(RBC), they are adaptable to a wide range ...