Coupling spin qubits via superconductors

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Coupling spin qubits via superconductors. / Leijnse, Martin; Flensberg, Karsten.

In: Physical Review Letters, Vol. 111, No. 6, 060501, 06.08.2013.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Leijnse, M & Flensberg, K 2013, 'Coupling spin qubits via superconductors', Physical Review Letters, vol. 111, no. 6, 060501. https://doi.org/10.1103/PhysRevLett.111.060501

APA

Leijnse, M., & Flensberg, K. (2013). Coupling spin qubits via superconductors. Physical Review Letters, 111(6), [060501]. https://doi.org/10.1103/PhysRevLett.111.060501

Vancouver

Leijnse M, Flensberg K. Coupling spin qubits via superconductors. Physical Review Letters. 2013 Aug 6;111(6). 060501. https://doi.org/10.1103/PhysRevLett.111.060501

Author

Leijnse, Martin ; Flensberg, Karsten. / Coupling spin qubits via superconductors. In: Physical Review Letters. 2013 ; Vol. 111, No. 6.

Bibtex

@article{c2cf53038aee47b7a61bd645456813cb,
title = "Coupling spin qubits via superconductors",
abstract = "We show how superconductors can be used to couple, initialize, and read out spatially separated spin qubits. When two single-electron quantum dots are tunnel coupled to the same superconductor, the singlet component of the two-electron state partially leaks into the superconductor via crossed Andreev reflection. This induces a gate-controlled singlet-triplet splitting which, with an appropriate superconductor geometry, remains large for dot separations within the superconducting coherence length. Furthermore, we show that when two double-dot singlet-triplet qubits are tunnel coupled to a superconductor with finite charging energy, crossed Andreev reflection enables a strong two-qubit coupling over distances much larger than the coherence length.",
author = "Martin Leijnse and Karsten Flensberg",
year = "2013",
month = aug,
day = "6",
doi = "10.1103/PhysRevLett.111.060501",
language = "English",
volume = "111",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "6",

}

RIS

TY - JOUR

T1 - Coupling spin qubits via superconductors

AU - Leijnse, Martin

AU - Flensberg, Karsten

PY - 2013/8/6

Y1 - 2013/8/6

N2 - We show how superconductors can be used to couple, initialize, and read out spatially separated spin qubits. When two single-electron quantum dots are tunnel coupled to the same superconductor, the singlet component of the two-electron state partially leaks into the superconductor via crossed Andreev reflection. This induces a gate-controlled singlet-triplet splitting which, with an appropriate superconductor geometry, remains large for dot separations within the superconducting coherence length. Furthermore, we show that when two double-dot singlet-triplet qubits are tunnel coupled to a superconductor with finite charging energy, crossed Andreev reflection enables a strong two-qubit coupling over distances much larger than the coherence length.

AB - We show how superconductors can be used to couple, initialize, and read out spatially separated spin qubits. When two single-electron quantum dots are tunnel coupled to the same superconductor, the singlet component of the two-electron state partially leaks into the superconductor via crossed Andreev reflection. This induces a gate-controlled singlet-triplet splitting which, with an appropriate superconductor geometry, remains large for dot separations within the superconducting coherence length. Furthermore, we show that when two double-dot singlet-triplet qubits are tunnel coupled to a superconductor with finite charging energy, crossed Andreev reflection enables a strong two-qubit coupling over distances much larger than the coherence length.

U2 - 10.1103/PhysRevLett.111.060501

DO - 10.1103/PhysRevLett.111.060501

M3 - Journal article

C2 - 23971543

VL - 111

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 6

M1 - 060501

ER -

ID: 49889655