Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits

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

Standard

Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits. / Schulenborg, Jens; Burrello, Michele; Leijnse, Martin; Flensberg, Karsten.

In: Physical Review B, Vol. 103, No. 24, 245407, 03.06.2021.

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

Harvard

Schulenborg, J, Burrello, M, Leijnse, M & Flensberg, K 2021, 'Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits', Physical Review B, vol. 103, no. 24, 245407. https://doi.org/10.1103/PhysRevB.103.245407

APA

Schulenborg, J., Burrello, M., Leijnse, M., & Flensberg, K. (2021). Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits. Physical Review B, 103(24), [245407]. https://doi.org/10.1103/PhysRevB.103.245407

Vancouver

Schulenborg J, Burrello M, Leijnse M, Flensberg K. Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits. Physical Review B. 2021 Jun 3;103(24). 245407. https://doi.org/10.1103/PhysRevB.103.245407

Author

Schulenborg, Jens ; Burrello, Michele ; Leijnse, Martin ; Flensberg, Karsten. / Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits. In: Physical Review B. 2021 ; Vol. 103, No. 24.

Bibtex

@article{ae539b4de2854fdab90523845990fd68,

title = "Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits",

abstract = "Quantum dot based parity-to-charge conversion is a promising method for reading out quantum information encoded nonlocally into pairs of Majorana zero modes. To obtain a sizable parity-to-charge visibility, it is crucial to tune the relative phase of the tunnel couplings between the dot and the Majorana modes appropriately. However, in the presence of multiple quasidegenerate dot orbitals, it is in general not experimentally feasible to tune all couplings individually. This paper shows that such configurations could make it difficult to avoid a destructive multiorbital interference effect that substantially reduces the readout visibility. We analyze this effect using a Lindblad quantum master equation. This exposes how the experimentally relevant system parameters enhance or suppress the visibility when strong charging energy, measurement dissipation, and, most importantly, multiorbital interference is accounted for. In particular, we find that an intermediate-time readout could mitigate some of the interference-related visibility reductions affecting the stationary limit.",

keywords = "TOPOLOGICAL SUPERCONDUCTOR, NANOWIRE, INAS, SPIN, SIGNATURE, FERMIONS",

author = "Jens Schulenborg and Michele Burrello and Martin Leijnse and Karsten Flensberg",

year = "2021",

month = jun,

day = "3",

doi = "10.1103/PhysRevB.103.245407",

language = "English",

volume = "103",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

number = "24",

}

RIS

TY - JOUR

T1 - Multilevel effects in quantum dot based parity-to-charge conversion of Majorana box qubits

AU - Schulenborg, Jens

AU - Burrello, Michele

AU - Leijnse, Martin

AU - Flensberg, Karsten

PY - 2021/6/3

Y1 - 2021/6/3

N2 - Quantum dot based parity-to-charge conversion is a promising method for reading out quantum information encoded nonlocally into pairs of Majorana zero modes. To obtain a sizable parity-to-charge visibility, it is crucial to tune the relative phase of the tunnel couplings between the dot and the Majorana modes appropriately. However, in the presence of multiple quasidegenerate dot orbitals, it is in general not experimentally feasible to tune all couplings individually. This paper shows that such configurations could make it difficult to avoid a destructive multiorbital interference effect that substantially reduces the readout visibility. We analyze this effect using a Lindblad quantum master equation. This exposes how the experimentally relevant system parameters enhance or suppress the visibility when strong charging energy, measurement dissipation, and, most importantly, multiorbital interference is accounted for. In particular, we find that an intermediate-time readout could mitigate some of the interference-related visibility reductions affecting the stationary limit.

AB - Quantum dot based parity-to-charge conversion is a promising method for reading out quantum information encoded nonlocally into pairs of Majorana zero modes. To obtain a sizable parity-to-charge visibility, it is crucial to tune the relative phase of the tunnel couplings between the dot and the Majorana modes appropriately. However, in the presence of multiple quasidegenerate dot orbitals, it is in general not experimentally feasible to tune all couplings individually. This paper shows that such configurations could make it difficult to avoid a destructive multiorbital interference effect that substantially reduces the readout visibility. We analyze this effect using a Lindblad quantum master equation. This exposes how the experimentally relevant system parameters enhance or suppress the visibility when strong charging energy, measurement dissipation, and, most importantly, multiorbital interference is accounted for. In particular, we find that an intermediate-time readout could mitigate some of the interference-related visibility reductions affecting the stationary limit.

KW - TOPOLOGICAL SUPERCONDUCTOR

KW - NANOWIRE

KW - INAS

KW - SPIN

KW - SIGNATURE

KW - FERMIONS

U2 - 10.1103/PhysRevB.103.245407

DO - 10.1103/PhysRevB.103.245407

M3 - Journal article

VL - 103

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 24

M1 - 245407

ER -

ID: 272510817