Double quantum dot between two superconducting leads

Mahn Soo Choi; C. Bruder; Daniel Loss

doi:10.1016/S0921-4534(00)01715-9

Double quantum dot between two superconducting leads

Mahn Soo Choi, C. Bruder, Daniel Loss

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

A double quantum dot coupled to two superconducting leads is studied in the Coulomb blockade regime. The double dot mediates an effective Josephson coupling between the two superconducting leads, which in turn induce an exchange coupling between the spin states of the dots. The Josephson current depends on the spins on the dots, while the spin exchange coupling can be tuned by the superconducting phase difference. This spin-dependent Josephson current can be used to probe directly the correlated spin states (singlet or triplets).

Original language	English
Pages (from-to)	162-164
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	352
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(00)01715-9
Publication status	Published - 2001 Apr
Externally published	Yes

Keywords

Entanglement
Josephson effect
Quantum dot

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(00)01715-9

Cite this

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title = "Double quantum dot between two superconducting leads",

abstract = "A double quantum dot coupled to two superconducting leads is studied in the Coulomb blockade regime. The double dot mediates an effective Josephson coupling between the two superconducting leads, which in turn induce an exchange coupling between the spin states of the dots. The Josephson current depends on the spins on the dots, while the spin exchange coupling can be tuned by the superconducting phase difference. This spin-dependent Josephson current can be used to probe directly the correlated spin states (singlet or triplets).",

keywords = "Entanglement, Josephson effect, Quantum dot",

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AU - Bruder, C.

AU - Loss, Daniel

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AB - A double quantum dot coupled to two superconducting leads is studied in the Coulomb blockade regime. The double dot mediates an effective Josephson coupling between the two superconducting leads, which in turn induce an exchange coupling between the spin states of the dots. The Josephson current depends on the spins on the dots, while the spin exchange coupling can be tuned by the superconducting phase difference. This spin-dependent Josephson current can be used to probe directly the correlated spin states (singlet or triplets).

KW - Entanglement

KW - Josephson effect

KW - Quantum dot

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ER -

Double quantum dot between two superconducting leads

Abstract

Keywords

ASJC Scopus subject areas

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