Susceptibility of trapped-ion qubits to low-dose radiation sources

  title={Susceptibility of trapped-ion qubits to low-dose radiation sources},
  author={Jiafeng Cui and A. J. Rasmusson and Marissa D’Onofrio and Yu-Xia Xie and Evangeline Wolanski and Philip Richerme},
  journal={Journal of Physics B: Atomic, Molecular and Optical Physics},
We experimentally study the real-time susceptibility of trapped-ion quantum systems to small doses of ionizing radiation. We expose an ion-trap apparatus to a variety of α, β, and γ sources and measure the resulting changes in trapped-ion qubit lifetimes, coherence times, gate fidelities, and motional heating rates. We found no quantifiable degradation of ion trap performance in the presence of low-dose radiation sources for any of the measurements performed. This finding is encouraging for the… 
A Systematic Methodology to Compute the Quantum Vulnerability Factors for Quantum Circuits
The Quantum Vulnerability Factor (QVF) is proposed as a metric to measure the impact that the corruption of a qubit has on the circuit output probability distribution, and guidelines on how to map the qubits in the real quantum computer to reduce the output error and to reduced the probability of having a radiation-induced corruption to modify the output.


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Demonstration of the trapped-ion quantum CCD computer architecture.
A cryogenic surface trap is used to integrate all necessary elements of the QCCD architecture-a scalable trap design, parallel interaction zones and fast ion transport-into a programmable trapped-ion quantum computer that has a system performance consistent with the low error rates achieved in the individual ion crystals.
Nature Communications 12
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Programmable quantum simulations of spin systems with trapped ions
Author(s): Monroe, C; Campbell, WC; Duan, LM; Gong, ZX; Gorshkov, AV; Hess, PW; Islam, R; Kim, K; Linke, NM; Pagano, G; Richerme, P; Senko, C; Yao, NY | Abstract: Laser-cooled and trapped atomic ions
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A complete toolbox is experimentally demonstrated and the implementation of a full cycle of qubit loss detection and correction on a minimal instance of a topological surface code is implemented.
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Evidence is provided that ionizing radiation from environmental radioactive materials and cosmic rays contributes to an elevated quasiparticle density, which it is predicted would ultimately limit the coherence times of superconducting qubits of the type measured here to milliseconds.