Dynamics of a Charge Qubit Encoded in a Double Quantum Dot |
| J. Łuczak, B.R. Bułka
Institute of Molecular Physics, Polish Academy of Sciences, Mariana Smoluchowskiego 17, 60-179 Poznań, Poland |
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| We study the short time dynamics of a charge qubit encoded in two coherently coupled quantum dots connected to external electrodes. In the regime of sequential tunneling the waiting time distribution is used to investigate in details statistics of the tunneling events and their correlations. We show that the coherent rotation of the qubit state on the Bloch sphere can be seen in tunneling events when an electron is injected and leave the system. Decoherence, relaxation of the qubit state as well as leakage processes are studied by means of transient currents. |
DOI: 10.12693/APhysPolA.133.748 PACS numbers: 03.67.Lx 73.63.Kv 73.23.Ra |