Computed models of natural radiation backgrounds in qubits and superconducting detectors
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866910786528477184 |
|---|---|
| author | Fowler, Joseph Florang, Ian Fogarty Nakamura, Nathan Swetz, Daniel Szypryt, Paul Ullom, Joel |
| author_facet | Fowler, Joseph Florang, Ian Fogarty Nakamura, Nathan Swetz, Daniel Szypryt, Paul Ullom, Joel |
| contents | Naturally occurring radiation backgrounds cause correlated decoherence events in superconducting qubits. These backgrounds include both gamma rays produced by terrestrial radioisotopes and cosmic rays. We use the particle-transport code Geant4 and the PARMA summary of the cosmic-ray spectrum to model both sources of natural radiation and to study their effects in the typical substrates used in superconducting electronics. We focus especially on three rates that summarize radiation's effect on substrates. We give analytic expressions for these rates, and how they depend upon parameters including laboratory elevation, substrate material, ceiling thickness, and wafer area and thickness. The modeled rates and the distribution of event energies are consistent with our earlier measurement of radiation backgrounds using a silicon thermal kinetic-inductance detector. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_16974 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Computed models of natural radiation backgrounds in qubits and superconducting detectors Fowler, Joseph Florang, Ian Fogarty Nakamura, Nathan Swetz, Daniel Szypryt, Paul Ullom, Joel Quantum Physics Instrumentation and Detectors Naturally occurring radiation backgrounds cause correlated decoherence events in superconducting qubits. These backgrounds include both gamma rays produced by terrestrial radioisotopes and cosmic rays. We use the particle-transport code Geant4 and the PARMA summary of the cosmic-ray spectrum to model both sources of natural radiation and to study their effects in the typical substrates used in superconducting electronics. We focus especially on three rates that summarize radiation's effect on substrates. We give analytic expressions for these rates, and how they depend upon parameters including laboratory elevation, substrate material, ceiling thickness, and wafer area and thickness. The modeled rates and the distribution of event energies are consistent with our earlier measurement of radiation backgrounds using a silicon thermal kinetic-inductance detector. |
| title | Computed models of natural radiation backgrounds in qubits and superconducting detectors |
| topic | Quantum Physics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2411.16974 |