Binary Optimal Control of Single-Flux-Quantum Pulse Sequences

Binary sequences with optimal autocorrelation

Optimal pulse design in quantum control: a unified computational method.

Many key aspects of control of quantum systems involve manipulating a large quantum ensemble exhibiting variation in the value of parameters characterizing the system dynamics. Developing electromagnetic pulses to produce a desired evolution in the presence of such variation is a fundamental and challenging problem in this research area. We present such robust pulse designs as an optimal contro...

Optimal Control of Single Spin 1/2 Quantum Systems

The purpose of this study is to explore the optimal control problems for a class of single spin 1/2 quantum ensembles. The system in question evolves on a manifold in R and is modeled as a bilinear control form whose states are represented as coherence vectors. An associated matrix Lie group system with state space SO(3) is introduced in order to facilitate solving the given problem. The contro...

Optimal control of coupled spin dynamics: design of NMR pulse sequences by gradient ascent algorithms.

In this paper, we introduce optimal control algorithm for the design of pulse sequences in NMR spectroscopy. This methodology is used for designing pulse sequences that maximize the coherence transfer between coupled spins in a given specified time, minimize the relaxation effects in a given coherence transfer step or minimize the time required to produce a given unitary propagator, as desired....

Zinc-Nickel Binary Alloys Electrodeposition of Steel Using Pulse Current

Zinc-Nickel electrodeposits have been widely adopted for surface treatment of automobile steel sheet for high corrosion resistance. In this work the effect of pulse parameters on the Zn-Ni alloy electrodeposits was investigated. The hardness, thickness, corrosion resistance and composition of deposits thus produced were investigated. The surface topography of the deposits was also observed in S...