Quantum computation with quantum dots and terahertz cavity quantum electrodynamics

Mark S. Sherwin, Atac Imamoglu, Thomas Montroy
1999 Physical Review A. Atomic, Molecular, and Optical Physics  
A quantum computer is proposed in which information is stored in the two lowest electronic states of doped quantum dots (QDs). Many QDs are located in a microcavity. A pair of gates controls the energy levels in each QD. A Controlled Not (CNOT) operation involving any pair of QDs can be effected by a sequence of gate-voltage pulses which tune the QD energy levels into resonance with frequencies of the cavity or a laser. The duration of a CNOT operation is estimated to be much shorter than the
more » ... shorter than the time for an electron to decohere by emitting an acoustic phonon.
doi:10.1103/physreva.60.3508 fatcat:biotm5bm6bgo7mdlop7o52ce4y