The coherent manipulation, filtering, and measurement of the electron spin in solid-state nanostructures has potential applications for both conventional and quantum computation as well as for quantum communication. This article is intended as a review of our proposal to use electron spins in quantum confined structures as quantum bits (qubits). The physical requirements for implementing a quantum computer, including single- and two-qubit gate operations, phase coherence, initialization, and read-out, will be discussed. In addition, we also present recently proposed schemes for using a single quantum dot as spin-filter and spin-memory device. In the context of spintronics, it is quite natural to consider spin-entangled electron pairs as a basic resource for quantum communication; we show that the entanglement of such EPR pairs can be detected in mesoscopic transport measurements using metallic as well as superconducting leads attached to the dots.
CITATION STYLE
Burkard, G., Engel, H.-A., & Loss, D. (2007). Spintronics, Quantum Computing, and Quantum Communication in Quantum Dots. In Fundamentals of Quantum Information (pp. 241–265). Springer Berlin Heidelberg. https://doi.org/10.1007/3-540-45933-2_7
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