Charge-based quantum computing using single donors in semiconductors

Details Charge-based quantum computing using single donors in semiconductors Charge-based quantum computing using single donors in semiconductors

2003-06-10

arxiv.org/abs/cond-mat/0306235v2

Physics

Condensed Matter

5 pages, 4 figures, updated version submitted to Physical Review B

Scientific paper

10.1103/PhysRevB.69.113301

Solid-state quantum computer architectures with qubits encoded using single atoms are now feasible given recent advances in atomic doping of semiconductors. Here we present a charge qubit consisting of two dopant atoms in a semiconductor crystal, one of which is singly ionised. Surface electrodes control the qubit and a radio-frequency single electron transistor provides fast readout. The calculated single gate times, of order 50ps or less, are much shorter than the expected decoherence time. We propose universal one- and two-qubit gate operations for this system and discuss prospects for fabrication and scale up.

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