Electron Spins in Artificial Atoms and Molecules for Quantum Computing

Details Electron Spins in Artificial Atoms and Molecules for Quantum Computing Electron Spins in Artificial Atoms and Molecules for Quantum Computing

2002-01-24

arxiv.org/abs/cond-mat/0201437v1

Semicond. Sci. Technol. 17, 355-366 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

13 pages, 8 figures, Invited Review (Semiconductor Spintronics, Special Issue of SST)

Scientific paper

10.1088/0268-1242/17/4/308

Achieving control over the electron spin in quantum dots (artificial atoms) or real atoms promises access to new technologies in conventional and in quantum information processing. Here we review our proposal for quantum computing with spins of electrons confined to quantum dots. We discuss the basic requirements for implementing spin-qubits, and describe a complete set of quantum gates for single- and two-qubit operations. We show how a quantum dot attached to leads can be used for spin filtering and spin read-out, and as a spin-memory device. Finally, we focus on the experimental characterization of the quantum dot systems, and discuss transport properties of a double-dot and show how Kondo correlations can be used to measure the Heisenberg exchange interaction between the spins of two dots.

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