High-Fidelity Simultaneous Detection of Trapped Ion Qubit Register

Abstract

Qubit state detection is an important part of a quantum computation. As number of qubits in a quantum register increases, it is necessary to maintain high fidelity detection to accurately measure the multi-qubit state. Here we present experimental demonstration of high-fidelity detection of a multi-qubit trapped ion register with average single qubit detection error of 4.2(1.5) ppm and a 4-qubit state detection error of 17(2) ppm, limited by the decay lifetime of the qubit, using a novel single-photon-sensitive camera with fast data collection, excellent temporal and spatial resolution, and low instrumental crosstalk.

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Cited by in corpus (13)

• State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector
• Fluorescence Detection of a Trapped Ion with a Monolithically Integrated Single-Photon-Counting Avalanche Diode
• Intensified Tpx3Cam, a fast data-driven optical camera with nanosecond timing resolution for single photon detection in quantum applications
• Scalable hyperfine qubit state detection via electron shelving in the ${}^2$D${}_{5/2}$ and ${}^2$F${}_{7/2}$ manifolds in ${}^{171}$Yb${}^{+}$
• High-fidelity indirect readout of trapped-ion hyperfine qubits
• Two-tone Doppler cooling of radial two-dimensional crystals in a radiofrequency ion trap
• Entangling gates for trapped-ion quantum computation and quantum simulation
• A tensor network discriminator architecture for classification of quantum data on quantum computers
• Efficient site-resolved imaging and spin-state detection in dynamic two-dimensional ion crystals
• Deterministic preparation of a dual-species two-ion crystal
• Doubly-ionized lanthanum as a qubit candidate for quantum networks
• Study of afterpulsing in optical image intensifiers
• Sensing high-frequency ac fields via a two-qubit sensor