Entanglement of nuclear spins in spin-blocked quantum dots

Mikio Eto, Takashi Ashiwa, Mikio Murata

Research output: Contribution to journalConference article

2 Citations (Scopus)

Abstract

We theoretically study unique properties of nuclear spins in quantum dots: an entanglement derived by the spin flip of electrons through hyperfine interaction. The correlation among nuclear spins develops gradually in the presence of the electric current accompanied by the spin flip. This situation is relevant to a leakage current in spin-blocked regions where electrons cannot be transported unless their spins are flipped. The correlated state of nuclear spins drastically enhances the spin-flip rate of electrons and hence the leakage current. By numerical calculations, we show that the enhancement of the current is observable when the residence time of electrons in the quantum dots is shorter than the dephasing time T*2 of nuclear spins.

Original languageEnglish
Pages (from-to)426-429
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume22
Issue number1-3
DOIs
Publication statusPublished - 2004 Apr 1
Event15th International Conference on ELectronic Propreties - Nara, Japan
Duration: 2003 Jul 142003 Jul 18

Keywords

  • Entanglement
  • Nuclear spin
  • Quantum dot
  • Spin blockade

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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