Quantum Dynamics of Coupled Quantum-Dot Qubits and Dephasing Effects Induced by Detections

摘要

In conclusion, using rate equations we demonstrate that this coupled QD system may perform all the operations of single qubit. By measuring the current variation we can extract the information of the coupled QD system. Also, we show that in the presence of the dephasing, the oscillating current through the detector decays drastically. For the application of the coupled QD system in the quantum computing and information, keeping an appropriate dephasing rate is necessary.