Coulomb Interaction in Quantum Dot with a Precessing Magnetic Field

We study electronic transport through a quantum dot (QD) with a precessing magnetic field. By using the Keldysh nonequilibrium Green function method, formulas of local density of states (LDOS) and conductance of QD are derived self-consistently. It shows that the LDOS and conductancehave obvious changes with the Coulomb blockade interaction. The intensityand angle of the magnetic field or temperatures, which reflect themesoscopic structure of the QD are derived. The superiority of this device is that the QD can be controlled easily by the magnetic field, so it isvaluable to apply in generating, manipulating and probing spin state.