Charge qubit rotations in a double-dot nanostructure
Leonid A. Openov, Er V. Tsukanov · 2004
Quantum operations with a charge solid-state qubit whose logical states are formed by two spatially separated localized states of an electron in the double-dot structure are studied theoretically. We show that it is possible to perform various one-qubit rotations making use of the microwave pulses tuned to the resonances between the localized states and the excited state delocalized over the nanostructure. Explicit analytic expression for the time-dependent electron state vector is derived, and the appropriate pulse parameters are determined. PACS Numbers: 03.67.Lx, 73.21.La, 85.35.-p During past decade, quantum computing (QC) or, more generally, quantum information processing, attracted much attention [1]. The reasons for that interest are (i) the existence of quantum algorithms [2] that could perform calculations exponentially faster as compared with classical ones (QC software), and (ii) the rapid development of technology and material science [3] that allowed to realize some prototypes of QC devices (QC hardware). The key elements of the QC hardware are