Charge-to-spin conversion of electron entanglement states and spin-interaction-free solid-state quantum computation

Wei Min Zhang, Yin Zhong Wu, Chopin Soo, Mang Feng

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Without resorting to spin-spin coupling, we propose a scalable spin quantum computing scheme assisted with a semiconductor multiple-quantum-dot structure. The techniques of single electron transitions and the nanostructure of quantum-dot cellular automata (QCA) are used to generate charge entangled states of two electrons, which are then converted into spin entanglement states using single-spin rotations only. Deterministic two-qubit quantum gates are also manipulated using only single-spin rotations with the help of QCA. A single-shot readout of spin states can be carried out by coupling the multiple dot structure to a quantum point contact. As a result, deterministic spin-interaction-free quantum computing can be implemented in semiconductor nanostructure.

Original languageEnglish
Article number165311
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number16
DOIs
Publication statusPublished - 2007 Oct 16

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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