Electrical measurement of a two-electron spin state in a double quantum dot

Nobuhiko Yokoshi, Hiroshi Imamura, Hideo Kosaka

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We propose a scheme for electrical measurement of two-electron spin states in a semiconductor double quantum dot. We calculated the adiabatic charge transfer when surface gates are modulated in time. Because of spin-orbit coupling in the semiconductor, spatial displacement of the electrons causes a total spin rotation. It follows that the expectation value of the transferred charge reflects the relative phase as well as the total spin population of a prepared singlet-triplet superposition state. The precise detection of the charge transfer serves to identify the quantum superposition.

Original languageEnglish
Article number046806
JournalPhysical Review Letters
Volume103
Issue number4
DOIs
Publication statusPublished - 2009 Aug 6

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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