A unified theory is given of dynamically modified decay and decoherence of fielddriven multilevel multipartite entangled states that are weakly coupled to zerotemperature baths or undergo random phase fluctuations. The theory allows for arbitrary local differences in their coupling to the environment. Due to such differences, the optimal driving-field modulation to ensure maximal fidelity is fo...

The evolution of a two-state system driven by a sequence of imperfect π pulses (with random phase or amplitude errors) is calculated. The resulting decreased fidelity is used to derive a plausible limit on the performance of ”bang-bang” control methods for the suppression of decoherence. Typeset using REVTEX

Nature is the principal source for proposing new optimization methods such as genetic algorithms (GA) and simulated annealing (SA) methods. All traditional evolutionary algorithms are heuristic population-based search procedures that incorporate random variation and selection. The main contribution of this study is that it proposes a novel optimization method that relies on one of the theories ...

Clock and data recovery (CDR) circuits incorporating bangbang (binary) phase detectors (PDs) have recently found wide usage. In contrast to their linear counterparts, bang-bang PDs relax the speed and precision required of flipflops and other circuits in the signal path, reducing the complexity and the power dissipation. However, the heavily nonlinear nature of these PDs makes the loop analysis...

PURPOSE Obstructive sleep apnea (OSA) is prevalent in children and diagnostic polysomnography is costly and not readily available in all areas. We developed a pediatric modification of a commonly used adult clinical prediction tool for stratifying the risk of OSA and the need for polysomnography. METHODS A total of 312 children (age 9-17 years) from phase 2 of the Tucson Children's Assessment...

A new fuzzy bang–bang relay controller (FBBRC) is introduced in this paper. The new controller is inherently optimal due to its bang–bang property. The controller has fuzzy decision-making capability in its inputs and have two fixed levels bang–bang output. Consequently, the tuning of FBBRC is restricted to input parameters only in comparison to standard fuzzy logic controller (FLC) where the o...

We study bang–bang control problems that depend on a parameter p. For a fixed nominal parameter p0, it is assumed that the bang-bang control has finitely many switching points and satisfies second order sufficient conditions (SSC). SSC are formulated and checked in terms of an associated finitedimensional optimization problem w.r.t. the switching points and the free final time. We show that the...