Correlated dynamics of a Rabi oscillation and a quantum tunneling in coupled quantum dots

摘要

We couple the Rabi oscillation in a double quantum dot (DQD) with the quantum tunneling in another DQD by Coulomb interaction between the neighboring dots. Such a coupling leads to correlation of the Rabi oscillating electron and the quantum tunneling one, and gives a tendency of synchronizing them under appropriate Rabi frequency Omega(R) and tunneling rate T-c. The correlated oscillation is shown clearly in the tunneling current. As Omega(R) = T-c, the Rabi oscillation and the quantum tunneling reach their strongest correlation and the two electrons finish their complete transitions simultaneously. And then, a single optical signal accomplishes a gang control of two electrons. This result encourages superior design of two-qubit quantum gates based on correlated DQDs. (C) 2015 Elsevier B.V. All rights reserved