Dielectric surface loss in superconducting resonators with flux-trapping holes

B Chiaro; A Megrant; A Dunsworth; Z Chen; R Barends; B Campbell; Y Chen; A Fowler; I C Hoi; E Jeffrey; J Kelly; J Mutus; C Neill; P J J O'Malley; C Quintana; P Roushan; D Sank; A Vainsencher; J Wenner; T C White; John M Martinis

doi:10.1088/0953-2048/29/10/104006

Dielectric surface loss in superconducting resonators with flux-trapping holes

B Chiaro^*, A Megrant, A Dunsworth, Z Chen, R Barends, B Campbell, Y Chen, A Fowler, I C Hoi, E Jeffrey, J Kelly, J Mutus, C Neill, P J J O'Malley, C Quintana, P Roushan, D Sank, A Vainsencher, J Wenner, T C WhiteJohn M Martinis

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

28 Citations (Scopus)

Abstract

Surface distributions of two level system (TLS) defects and magnetic vortices are limiting dissipation sources in superconducting quantum circuits. Arrays of flux-trapping holes are commonly used to eliminate loss due to magnetic vortices, but may increase dielectric TLS loss. We find that dielectric TLS loss increases by approximately 25% for resonators with a hole array beginning 2 μm from the resonator edge, while the dielectric loss added by holes further away was below measurement sensitivity. Other forms of loss were not affected by the holes. Additionally, we estimate the loss due to residual magnetic effects to be 9 x10^-10 μT^-1 for resonators patterned with flux-traps and operated in magnetic fields up to 5 μT. This is orders of magnitude below the total loss of the best superconducting coplanar waveguide resonators.

Original language	English
Article number	104006
Journal	Superconductor Science and Technology
Volume	29
Issue number	10
DOIs	https://doi.org/10.1088/0953-2048/29/10/104006
Publication status	Published - 19 Aug 2016
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Research Keywords

quantum computing
resonator
superconducting qubit
surface loss
vortex

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Chiaro, B., Megrant, A., Dunsworth, A., Chen, Z., Barends, R., Campbell, B., Chen, Y., Fowler, A., Hoi, I. C., Jeffrey, E., Kelly, J., Mutus, J., Neill, C., O'Malley, P. J. J., Quintana, C., Roushan, P., Sank, D., Vainsencher, A., Wenner, J., ... Martinis, J. M. (2016). Dielectric surface loss in superconducting resonators with flux-trapping holes. Superconductor Science and Technology, 29(10), Article 104006. https://doi.org/10.1088/0953-2048/29/10/104006

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abstract = "Surface distributions of two level system (TLS) defects and magnetic vortices are limiting dissipation sources in superconducting quantum circuits. Arrays of flux-trapping holes are commonly used to eliminate loss due to magnetic vortices, but may increase dielectric TLS loss. We find that dielectric TLS loss increases by approximately 25% for resonators with a hole array beginning 2 μm from the resonator edge, while the dielectric loss added by holes further away was below measurement sensitivity. Other forms of loss were not affected by the holes. Additionally, we estimate the loss due to residual magnetic effects to be 9 x10-10 μT-1 for resonators patterned with flux-traps and operated in magnetic fields up to 5 μT. This is orders of magnitude below the total loss of the best superconducting coplanar waveguide resonators.",

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Chiaro, B, Megrant, A, Dunsworth, A, Chen, Z, Barends, R, Campbell, B, Chen, Y, Fowler, A, Hoi, IC, Jeffrey, E, Kelly, J, Mutus, J, Neill, C, O'Malley, PJJ, Quintana, C, Roushan, P, Sank, D, Vainsencher, A, Wenner, J, White, TC & Martinis, JM 2016, 'Dielectric surface loss in superconducting resonators with flux-trapping holes', Superconductor Science and Technology, vol. 29, no. 10, 104006. https://doi.org/10.1088/0953-2048/29/10/104006

TY - JOUR

T1 - Dielectric surface loss in superconducting resonators with flux-trapping holes

AU - Chiaro, B

AU - Megrant, A

AU - Dunsworth, A

AU - Chen, Z

AU - Barends, R

AU - Campbell, B

AU - Chen, Y

AU - Fowler, A

AU - Hoi, I C

AU - Jeffrey, E

AU - Kelly, J

AU - Mutus, J

AU - Neill, C

AU - O'Malley, P J J

AU - Quintana, C

AU - Roushan, P

AU - Sank, D

AU - Vainsencher, A

AU - Wenner, J

AU - White, T C

AU - Martinis, John M

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/8/19

Y1 - 2016/8/19

N2 - Surface distributions of two level system (TLS) defects and magnetic vortices are limiting dissipation sources in superconducting quantum circuits. Arrays of flux-trapping holes are commonly used to eliminate loss due to magnetic vortices, but may increase dielectric TLS loss. We find that dielectric TLS loss increases by approximately 25% for resonators with a hole array beginning 2 μm from the resonator edge, while the dielectric loss added by holes further away was below measurement sensitivity. Other forms of loss were not affected by the holes. Additionally, we estimate the loss due to residual magnetic effects to be 9 x10-10 μT-1 for resonators patterned with flux-traps and operated in magnetic fields up to 5 μT. This is orders of magnitude below the total loss of the best superconducting coplanar waveguide resonators.

AB - Surface distributions of two level system (TLS) defects and magnetic vortices are limiting dissipation sources in superconducting quantum circuits. Arrays of flux-trapping holes are commonly used to eliminate loss due to magnetic vortices, but may increase dielectric TLS loss. We find that dielectric TLS loss increases by approximately 25% for resonators with a hole array beginning 2 μm from the resonator edge, while the dielectric loss added by holes further away was below measurement sensitivity. Other forms of loss were not affected by the holes. Additionally, we estimate the loss due to residual magnetic effects to be 9 x10-10 μT-1 for resonators patterned with flux-traps and operated in magnetic fields up to 5 μT. This is orders of magnitude below the total loss of the best superconducting coplanar waveguide resonators.

KW - quantum computing

KW - resonator

KW - superconducting qubit

KW - surface loss

KW - vortex

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DO - 10.1088/0953-2048/29/10/104006

M3 - RGC 21 - Publication in refereed journal

SN - 0953-2048

VL - 29

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 10

M1 - 104006

ER -

Dielectric surface loss in superconducting resonators with flux-trapping holes

Abstract

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