Optically Driven Qubits in Artificial Molecules
arXiv:quant-ph/0005057 · doi:10.1103/PhysRevA.62.052306
Abstract
We present novel models of quantum gates based on coupled quantum dots in which a qubit is regarded as the superposition of ground states in each dot. Coherent control on the qubit is performed by both a frequency and a polarization of a monochromatic light pulse illuminated on the quantum dots. We also show that a simple combination of two single qubit gates functions as a controlled NOT gate resulting from an electron-electron interaction. To examine the decoherence of quantum states, we discuss electronic relaxation contributed mainly by LA phonon processes.
11 pages, 4 figures, submitted to Physical Review A
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- Exciton entanglement in two coupled semiconductor microcrystallites
- Auxiliary-level-assisted operations with charge qubits in semiconductors
- Phonon-induced decoherence of the two-level quantum subsystem due to relaxation and dephasing processes
- Laser-induced operations with charge qubits in a double-well nanostructure
- Charge qubit entanglement via conditional single-electron transfer in an array of quantum dots
- Electrical control of superposed quantum states evolution in quantum dot molecule by pulsed field