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

Abstract

Recently, de Visser and Blaauboer [Phys. Rev. Lett. {\bf 96}, 246801 (2006)] proposed the most efficient deterministic teleportation protocol $\mathcal{T}$ for electron spins in a semiconductor nanostructure consisting of a single and a double quantum dot. However, it is as yet unknown if $\mathcal{T}$ 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 $\mathcal{T}$. We show that nonclassical teleportation fidelity can be achieved with $\mathcal{T}$ provided certain conditions are met. Our study indicates that realization of quantum computation with quantum dots is indeed promising.

10 pages

References in corpus (6)

• Single-shot read-out of an individual electron spin in a quantum dot
• Control and Detection of Singlet-Triplet Mixing in a Random Nuclear Field
• Triplet-Singlet Spin Relaxation via Nuclei in a Double Quantum Dot
• Hyperfine interaction induced decoherence of electron spins in quantum dots
• Deterministic teleportation of electrons in a quantum dot nanostructure
• Production of multipartite entanglement for electron spins in quantum dots

Cited by in corpus (1)

• Teleportation between distant qudits via scattering of mobile qubits