ABSTRACT
One serious problem in the physical implementation of quantum computing is that of main-taining quantum noise. Noise (decoherence) of a quantum system, due to its interaction with the surrounding environment, is the main source of spoiling in the execution of a quantum algorithm. In this work we investigate quantum noise through methods from classical and quantum information theory. Decoherence is seen as the noise effect of a channel Operation on a single quantum bit (qubit) and its properties are investigated through the quantum entropy evolution and fidelity transmission. One of the fundamental physical systems that appears promising for quantum computation is that of an atom and electromagnetic (E/M) field in a cavity [1].
