The study of quantum speed limit time in a quantum critical environment

Quantum theory sets a bound on the speed of quantum evolution. The shortest time needed for quantm system to evolve from an initial state target is known as limit time. study this in open and closed systems has been subject much work information theory. inversely related evolution rate process. This relation such that decreases with increasing vice versa. In we QSL case which qubit interacts critical environment. We choose environment be Ising spin chain transverse field. It observed direct coherence system. will also effect perturbation coupling parameter. number chain.