High-Kinetic-Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field

N. Samkharadze; A. Bruno; P. Scarlino; G. Zheng; D.P. Divincenzo; L. DiCarlo; L. M K Vandersypen

doi:10.1103/PhysRevApplied.5.044004

High-Kinetic-Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field

N. Samkharadze, A. Bruno, P. Scarlino, G. Zheng, D.P. Divincenzo, L. DiCarlo, L. M K Vandersypen

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Abstract

We present superconducting microwave-frequency resonators based on NbTiN nanowires. The small cross section of the nanowires minimizes vortex generation, making the resonators resilient to magnetic fields. Measured intrinsic quality factors exceed 2×105 in a 6-T in-plane magnetic field and 3×104 in a 350-mT perpendicular magnetic field. Because of their high characteristic impedance, these resonators are expected to develop zero-point voltage fluctuations one order of magnitude larger than in standard coplanar waveguide resonators. These properties make the nanowire resonators well suited for circuit QED experiments needing strong coupling to quantum systems with small electric dipole moments and requiring a magnetic field, such as electrons in single and double quantum dots.

Original language	English
Article number	044004
Journal	Physical Review Applied
Volume	5
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevApplied.5.044004
Publication status	Published - 7 Apr 2016

Keywords

Nanophysics
Quantum Information
Superconductivity

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abstract = "We present superconducting microwave-frequency resonators based on NbTiN nanowires. The small cross section of the nanowires minimizes vortex generation, making the resonators resilient to magnetic fields. Measured intrinsic quality factors exceed 2×105 in a 6-T in-plane magnetic field and 3×104 in a 350-mT perpendicular magnetic field. Because of their high characteristic impedance, these resonators are expected to develop zero-point voltage fluctuations one order of magnitude larger than in standard coplanar waveguide resonators. These properties make the nanowire resonators well suited for circuit QED experiments needing strong coupling to quantum systems with small electric dipole moments and requiring a magnetic field, such as electrons in single and double quantum dots.",

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AU - Samkharadze, N.

AU - Bruno, A.

AU - Scarlino, P.

AU - Zheng, G.

AU - Divincenzo, D.P.

AU - DiCarlo, L.

AU - Vandersypen, L. M K

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AB - We present superconducting microwave-frequency resonators based on NbTiN nanowires. The small cross section of the nanowires minimizes vortex generation, making the resonators resilient to magnetic fields. Measured intrinsic quality factors exceed 2×105 in a 6-T in-plane magnetic field and 3×104 in a 350-mT perpendicular magnetic field. Because of their high characteristic impedance, these resonators are expected to develop zero-point voltage fluctuations one order of magnitude larger than in standard coplanar waveguide resonators. These properties make the nanowire resonators well suited for circuit QED experiments needing strong coupling to quantum systems with small electric dipole moments and requiring a magnetic field, such as electrons in single and double quantum dots.

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High-Kinetic-Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field

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