Quantum state transfer from a photon to an electron spin in quantum dots and quantum dynamics of electron-nuclei coupled system

Toshihide Takagahara, Özgür Ĉakir

Research output: Chapter in Book/Report/Conference proceedingChapter


Photons and electrons are the key quantum media for the quantum in- formation processing based on solid state devices. Here we consider the key elements to realize the quantum repeater and reveal the underly- ing physics of relevant elementary processes. Especially, we discuss the quantum state transfer between a single photon and a single electron and analyze the performance of the operation, clarifying the conditions to achieve the high fidelity of the quantum state transfer. We also in- vestigate quantum dynamics in the electron-nuclei coupled spin system in quantum dots and predict a couple of new phenomena related to the correlations induced by the hyperne interaction, namely bunching and revival in the electron spin measurements. The underlying mechanism is the squeezing and increase in the purity of the nuclear spin state through the electron spin measurements. These findings will open the way to the long-lived quantum memory based on nuclear spins.

Original languageEnglish
Title of host publicationSemiconductor Quantum Bits
PublisherPan Stanford Publishing Pte. Ltd.
Number of pages20
ISBN (Electronic)9789814241199
ISBN (Print)9789814241052
Publication statusPublished - 2016 Apr 19
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Engineering(all)
  • Materials Science(all)

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