Quantum Computation with Quantum Dots

Details Quantum Computation with Quantum Dots Quantum Computation with Quantum Dots

1997-01-08

arxiv.org/abs/cond-mat/9701055v3

Phys. Rev. A 57, 120 (1998)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages, Latex, 2 ps figures. v2: 20 pages (very minor corrections, substantial expansion), submitted to Phys. Rev. A

Scientific paper

10.1103/PhysRevA.57.120

We propose a new implementation of a universal set of one- and two-qubit gates for quantum computation using the spin states of coupled single-electron quantum dots. Desired operations are effected by the gating of the tunneling barrier between neighboring dots. Several measures of the gate quality are computed within a newly derived spin master equation incorporating decoherence caused by a prototypical magnetic environment. Dot-array experiments which would provide an initial demonstration of the desired non-equilibrium spin dynamics are proposed.

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