Computed models of natural radiation backgrounds in qubits and superconducting detectors

• URL: http://arxiv.org/abs/2411.16974v1
• Date: Mon, 25 Nov 2024 22:57:32 GMT
• Title: Computed models of natural radiation backgrounds in qubits and superconducting detectors
• Authors: Joseph Fowler, Ian Fogarty Florang, Nathan Nakamura, Daniel Swetz, Paul Szypryt, Joel Ullom,
• Abstract summary: Naturally occurring radiation backgrounds cause correlated decoherence events in superconducting qubits. We use the particle-transport code Geant4 and the PARMA summary of the cosmic-ray spectrum to model both sources of natural radiation.
• Score: 0.0
• License:
• Abstract: 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.

Related papers

• Evaluating radiation impact on transmon qubits in above and underground facilities [52.89046593457984]
  We compare the response of a transmon qubit measured initially at the Fermilab SQMS above-ground facilities and then at the deep underground Gran Sasso Laboratory (INFN-LNGS, Italy) Results indicate that qubits respond to a strong gamma source and it is possible to detect particle impacts.
  arXiv  Detail & Related papers  (2024-05-28T16:54:45Z)
• Spectroscopic measurements and models of energy deposition in the substrate of quantum circuits by natural ionizing radiation [0.0]
  Naturally occurring background radiation is a source of correlated decoherence events in superconducting qubits. We measure the background spectra in silicon substrates located inside a millikelvin refrigerator. We find the background spectrum to be nearly featureless. Its intensity decreases by a factor of 40,000 between 100 keV and 3 MeV for silicon substrates 0.5 mm thick.
  arXiv  Detail & Related papers  (2024-04-16T19:30:45Z)
• Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source [0.0]
  We systematically study the properties of a transmon qubit under illumination by focused infrared radiation. Despite the high energy of incident photons, our observations agree well with a model of low-energy quasiparticle dynamics dominated by trapping.
  arXiv  Detail & Related papers  (2023-12-10T14:01:14Z)
• Directional spontaneous emission in photonic crystal slabs [49.1574468325115]
  Spontaneous emission is a fundamental out-of-equilibrium process in which an excited quantum emitter relaxes to the ground state due to quantum fluctuations. One way to modify these photon-mediated interactions is to alter the dipole radiation patterns of the emitter, e.g., by placing photonic crystals near them. Our study delves into the interaction between these directional emission patterns and the aforementioned variables, revealing the untapped potential to fine-tune collective quantum optical phenomena.
  arXiv  Detail & Related papers  (2023-12-04T15:35:41Z)
• Disentangling the sources of ionizing radiation in superconducting qubits [0.0]
  Radioactivity was recently discovered as a source of decoherence and correlated errors for the real-world implementation of superconducting quantum processors. We measure levels of radioactivity present in a typical laboratory environment (from muons, neutrons, and gamma's emitted by naturally occurring radioactive isotopes) and in the most commonly used materials for the assembly and operation of state-of-the-art superconducting qubits. We propose mitigation strategies for the operation of next-generation qubits in a radio-pure environment.
  arXiv  Detail & Related papers  (2022-11-24T13:33:21Z)
• CubeSat in-orbit validation of in-situ performance by high fidelity radiation modelling [55.41644538483948]
  The SpooQy-1 CubeSat mission demonstrated polarization-based quantum entanglement correlations using avalanche photodiodes for single-photon detection. We report the increasing dark count rates of two silicon Geiger-mode avalanche photodiodes observed throughout its 2 year orbital lifetime. We implement a high-fidelity radiation model combined with 3D computer aided design models of the SpooQy-1 CubeSat to estimate the accumulated displacement damage dose in each photodiode.
  arXiv  Detail & Related papers  (2022-09-01T12:33:27Z)
• Transient nuclear inversion by X-Ray Free Electron Laser in a tapered x-ray waveguid [0.36001039618949515]
  We show how tapered x-ray waveguides can focus and guide radiation from x-ray lasers. This feature can be used to significantly enhance spatial interactions of x-rays. Our results anticipate the important role of tapered x-ray waveguides in the emerging field of x-ray quantum optics with nuclear transitions.
  arXiv  Detail & Related papers  (2021-04-16T02:06:52Z)
• Near-Field Radiative Heat Transfer Eigenmodes [55.41644538483948]
  Near-field electromagnetic interaction between nanoscale objects produces enhanced radiative heat transfer. We present a theoretical framework to describe the temporal dynamics of the radiative heat transfer in ensembles of nanostructures.
  arXiv  Detail & Related papers  (2021-02-10T23:14:30Z)
• Collective radiation from distant emitters [63.391402501241195]
  We show that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.
  arXiv  Detail & Related papers  (2020-06-22T19:03:52Z)
• Nitrogen-vacancy defect emission spectra in the vicinity of an adjustable silver mirror [62.997667081978825]
  Optical emitters of quantum radiation in the solid state are important building blocks for emerging technologies. We experimentally study the emission spectrum of an ensemble of nitrogen-vacancy defects implanted around 8nm below the planar diamond surface.
  arXiv  Detail & Related papers  (2020-03-31T10:43:26Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.