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@article{827a9922315d48b8933e2ca299eaedf5,
title = "Fast, High-Fidelity Conditional-Phase Gate Exploiting Leakage Interference in Weakly Anharmonic Superconducting Qubits",
abstract = "Conditional-phase (cz) gates in transmons can be realized by flux pulsing computational states towards resonance with noncomputational ones. We present a 40 ns cz gate based on a bipolar flux pulse suppressing leakage (0.1{\%}) by interference and approaching the speed limit set by exchange coupling. This pulse harnesses a built-in echo to enhance fidelity (99.1{\%}) and is robust to long-timescale distortion in the flux-control line, ensuring repeatability. Numerical simulations matching experiment show that fidelity is limited by high-frequency dephasing and leakage by short-timescale distortion.",
keywords = "quantum benchmarking, quantum control, quantum gates, superconducting qubits",
author = "Rol, {M. A.} and F. Battistel and Malinowski, {F. K.} and Bultink, {C. C.} and Tarasinski, {B. M.} and R. Vollmer and N. Haider and N. Muthusubramanian and A. Bruno and Terhal, {B. M.} and L. Dicarlo",
year = "2019",
doi = "10.1103/PhysRevLett.123.120502",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "12",

}

RIS

TY - JOUR

T1 - Fast, High-Fidelity Conditional-Phase Gate Exploiting Leakage Interference in Weakly Anharmonic Superconducting Qubits

AU - Rol, M. A.

AU - Battistel, F.

AU - Malinowski, F. K.

AU - Bultink, C. C.

AU - Tarasinski, B. M.

AU - Vollmer, R.

AU - Haider, N.

AU - Muthusubramanian, N.

AU - Bruno, A.

AU - Terhal, B. M.

AU - Dicarlo, L.

PY - 2019

Y1 - 2019

N2 - Conditional-phase (cz) gates in transmons can be realized by flux pulsing computational states towards resonance with noncomputational ones. We present a 40 ns cz gate based on a bipolar flux pulse suppressing leakage (0.1%) by interference and approaching the speed limit set by exchange coupling. This pulse harnesses a built-in echo to enhance fidelity (99.1%) and is robust to long-timescale distortion in the flux-control line, ensuring repeatability. Numerical simulations matching experiment show that fidelity is limited by high-frequency dephasing and leakage by short-timescale distortion.

AB - Conditional-phase (cz) gates in transmons can be realized by flux pulsing computational states towards resonance with noncomputational ones. We present a 40 ns cz gate based on a bipolar flux pulse suppressing leakage (0.1%) by interference and approaching the speed limit set by exchange coupling. This pulse harnesses a built-in echo to enhance fidelity (99.1%) and is robust to long-timescale distortion in the flux-control line, ensuring repeatability. Numerical simulations matching experiment show that fidelity is limited by high-frequency dephasing and leakage by short-timescale distortion.

KW - quantum benchmarking

KW - quantum control

KW - quantum gates

KW - superconducting qubits

UR - http://www.scopus.com/inward/record.url?scp=85072782450&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.123.120502

DO - 10.1103/PhysRevLett.123.120502

M3 - Article

VL - 123

JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 12

M1 - 120502

ER -

ID: 57485016