Hyperfine interaction induced decoherence and deterministic teleportation of electrons in a quantum dot nanostructure

Details Hyperfine interaction induced decoherence and deterministic teleportation of electrons in a quantum dot nanostructure Hyperfine interaction induced decoherence and deterministic teleportation of electrons in a quantum dot nanostructure

2008-02-02

arxiv.org/abs/0802.0240v1

Physics

Quantum Physics

10 pages

Scientific paper

10.1103/PhysRevA.77.062338

Recently, de Visser and Blaauboer [Phys. Rev. Lett. {\bf 96}, 246801 (2006)] proposed the most efficient deterministic teleportation protocol $\cal T$ for electron spins in a semiconductor nanostructure consisting of a single and a double quantum dot. However, it is as yet unknown if $\cal T$ can be completed before decoherence sets in. In this paper we analyze the detrimental effect of nuclear spin baths, the main source of decoherence, on $\cal T$. We show that nonclassical teleportation fidelity can be achieved with $\cal T$ provided certain conditions are met. Our study indicates that realization of quantum computation with quantum dots is indeed promising.

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