Toward chorent quantum state control with coupled quantum dots

摘要

The coherent quantum state control relies on the time evolution of the quantum state which follows the Schrodinger equation. The simplest example of this is the Rabi oscillation observed in the two level system under the oscillating field. This is quite familiar in the atomic physics field, but it is only recently that the coherent quantum state control start to be considered in the solid state system, partly because it is directly related to the concept of the quantum computing. Theoretically it is shown that the single qubit rotation and the two qubits controlled NOT operation (quantum gate) are necessary to relaize quantum computing. The advantage of using the solid state device is the variety of possible qubits (two level system) and their interactions, which, at the same time, could be the disadvantage in terms of the decoherence.