Quantum Computation with Quantum Dots and Terahertz Cavity Quantum Electrodynamics

Details Quantum Computation with Quantum Dots and Terahertz Cavity Quantum Electrodynamics Quantum Computation with Quantum Dots and Terahertz Cavity Quantum Electrodynamics

1999-03-18

arxiv.org/abs/quant-ph/9903065v2

Physics

Quantum Physics

Revtex 6 pages, 3 postscript figures, minor typos corrected

Scientific paper

10.1103/PhysRevA.60.3508

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 time for an electron to decohere by emitting an acoustic phonon.

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