Dynamics of information transfer through the solid state Kane computer

Abstract

The susceptibility of transformed information to the magnetic field and a qubit system is investigated for the Kane solid state computer. It is shown that the field polarization and initial state of the system play an essential role in the abrupt and gradual quench of purity and fidelity. If the field and initial state have different polarizations, then purity and fidelity decrease abruptly, whereas if the polarizations are the same the decay is smooth. For certain classes of initial states, information is sent without any loss and this minimizes the amount of exchange information between the state and its environment.