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Now showing items 41-50 of 50
Motion of the wave-function zeros in spin-boson systems
(American Physical Society, 1995-05)
In the analytic Bargmann representation associated with the harmonic oscillator and spin coherent states, the wave functions considered as consisting of entire complex functions can be factorized in terms of their zeros ...
Controlling chaos may induce new attractors in an optical device
(Elsevier Science, B.V., 1995-04-01)
The logistic map has been used to describe period doubling bifurcations for periodically modulated lasers. It also represents an asymptotic approximation of Ikeda's map for a passive ring cavity. Because various control ...
Synchronization of chaotic resonators based on control theory
(American Physical Society, 1995-04)
We have investigated experimentally and computationally a synchronization scheme, based on control theory, for the case of two nearly identical chaotic diode resonators. From the experimentally captured time series we ...
History-dependent control of unstable periodic orbits
(American Physical Society, 1994-09)
We present a method of stabilizing unstable periodic orbits in systems whose natural time scales are on the order of or faster than the time it would take for the experimental implementation of the Ott-Grebogi-Yorke (OGY) ...
Period-doubling route to chaos in a semiconductor laser subject to optical injection
(American Institute of Physics, 1994-06-27)
Experimental measurements and a single-mode analysis of a quantum-well laser diode subject to strong optical injection are combined to demonstrate that the diode follows a period-doubling route to chaos. All laser parameters ...
Synchronization of chaotic diode resonators by occasional proportional feedback
(American Physical Society, 1994-03-14)
Synchronization of a pair of chaotic diode resonators has been experimentally achieved by applying a minute feedback signal to the amplitude of the drive voltage of a slave resonator. The signal is proportional to the ...
Using neural networks for controlling chaos
(The International Society for Optical Engineering (SPIE), 1994-03)
A feed-forward backpropagating neural network is trained to achieve and maintain control
of the unstable periodic orbits embedded in a chaotic attractor. The controlling algorithms
used for training the network are based ...
Frequency-to-voltage converter based on Bloch oscillations in a capacitively coupled GaAs-GaxAl1-xAs quantum well
(American Physical Society, 1993-09-15)
A charged capacitor which is placed with a semiconductor in a closed loop will normally discharge in a characteristic time τ=1/RC. We show, however, that if a semiconductor of high purity is subjected to a rf bias with ...
Stark effect in nonlinear Jaynes-Cummings models
(American Physical Society, 1993-02)
We investigate the effect of the Stark shifts on the atomic-inversion dynamics when a multilevel atom interacts with a two-mode quantized radiation field. We utilize Hamiltonians obtained by adiabatically eliminating all ...
Quantum collapses and revivals in a nonlinear Jaynes-Cummings model
(American Physical Society, 1991-04-01)
We investigate the atomic inversion dynamics when a multilevel atom interacts with a two-mode quantized radiation field in a Raman-type process. By utilizing the rotating-wave approximation and adiabatically eliminating ...