Spin-dependent Josephson current through double quantum dots and measurement of entangled electron states

Mahn-Soo Choi, C. Bruder, D. Loss

Research output: Contribution to journalArticle

124 Citations (Scopus)

Abstract

We study a double quantum dot, each dot of which is tunnel coupled to superconducting leads. In the Coulomb blockade regime, a spin-dependent Josephson coupling between two superconductors is induced, as well as an antiferromagnetic Heisenberg exchange coupling between the spins on the double dot that can be tuned by the superconducting phase difference. We show that the correlated spin states - singlet or triplets - on the double dot can be probed via the Josephson current in a dc-superconducting quantum interference device setup.

Original languageEnglish
Pages (from-to)13569-13572
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume62
Issue number20
DOIs
Publication statusPublished - 2000 Nov 15
Externally publishedYes

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Coulomb blockade
Exchange coupling
SQUIDs
electron states
Electron energy levels
Superconducting materials
Semiconductor quantum dots
Tunnels
quantum dots
tunnels
interference

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Spin-dependent Josephson current through double quantum dots and measurement of entangled electron states. / Choi, Mahn-Soo; Bruder, C.; Loss, D.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 20, 15.11.2000, p. 13569-13572.

Research output: Contribution to journalArticle

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