تقرير
State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector
| العنوان: | State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector |
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| المؤلفون: | Todaro, S. L., Verma, V. B., McCormick, K. C., Allcock, D. T. C., Mirin, R. P., Wineland, D. J., Nam, S. W., Wilson, A. C., Leibfried, D., Slichter, D. H. |
| المصدر: | Phys. Rev. Lett. 126, 010501 (2021) |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Superconductivity, Physics - Atomic Physics |
| الوصف: | We report high-fidelity state readout of a trapped ion qubit using a trap-integrated photon detector. We determine the hyperfine qubit state of a single $^9$Be$^+$ ion held in a surface-electrode rf ion trap by counting state-dependent ion fluorescence photons with a superconducting nanowire single-photon detector (SNSPD) fabricated into the trap structure. The average readout fidelity is 0.9991(1), with a mean readout duration of 46 $\mu$s, and is limited by the polarization impurity of the readout laser beam and by off-resonant optical pumping. Because there are no intervening optical elements between the ion and the detector, we can use the ion fluorescence as a self-calibrated photon source to determine the detector quantum efficiency and its dependence on photon incidence angle and polarization. Comment: 15 pages, 11 figures, including supplemental material |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.126.010501 |
| URL الوصول: | http://arxiv.org/abs/2008.00065 |
| رقم الأكسشن: | edsarx.2008.00065 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.126.010501 |
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