The problem of calculating the eigensystem of a general complex matrix is well known. In many cases, however, the eigensystem is poorly determined numerically in the sense that small changes in the ...

This study demonstrates how integrating decoherence-free subspaces with dynamical decoupling enhances quantum state fidelity, offering a practical route to more noise-resilient quantum computing ...

Let F be a complex Banach space, B(F) the algebra of all bounded operators acting on F, E = E(ℂ, B(F)) the Fréchet space of all entire functions from the complex plane into B(F), endowed with the ...