Optically Driven Qubits in Artificial Molecules

Details Optically Driven Qubits in Artificial Molecules Optically Driven Qubits in Artificial Molecules

2000-05-16

arxiv.org/abs/quant-ph/0005057v2

Physics

Quantum Physics

11 pages, 4 figures, submitted to Physical Review A

Scientific paper

10.1103/PhysRevA.62.052306

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.

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