State Readout of a Trapped Ion Qubit Using a Trap-Integrated Superconducting Photon Detector

Abstract

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.

15 pages, 11 figures, including supplemental material

References in corpus (44)

• The Physical Implementation of Quantum Computation
• Experimental issues in coherent quantum-state manipulation of trapped atomic ions
• Detecting Single Infrared Photons with 93% System Efficiency
• Quantum Computing with Very Noisy Devices
• Demonstration of a small programmable quantum computer with atomic qubits
• Demonstrating sub-3 ps temporal resolution in a superconducting nanowire single-photon detector
• Demonstration of the trapped-ion quantum-CCD computer architecture
• Heating of trapped ions from the quantum ground state
• A microfabricated surface-electrode ion trap for scalable quantum information processing
• Ion-trap measurements of electric-field noise near surfaces
• A quantum information processor with trapped ions
• High-fidelity readout of trapped-ion qubits
• Integrated multi-wavelength control of an ion qubit
• Integrated optical multi-ion quantum logic
• Integrated optical addressing of an ion qubit
• Detecting Dark Matter with Superconducting Nanowires
• A kilopixel array of superconducting nanowire single-photon detectors
• A Single-Photon Imager Based on Microwave Plasmonic Superconducting Nanowire
• Scalable ion traps for quantum information processing
• Quantum gate teleportation between separated qubits in a trapped-ion processor
• Reset dynamics and latching in niobium superconducting nanowire single-photon detectors
• High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films
• Readout of superconducting nanowire single-photon detectors at high count rates
• UV superconducting nanowire single-photon detectors with high efficiency, low noise, and 4 K operating temperature
• Efficient Fiber Optic Detection of Trapped Ion Fluorescence
• High fidelity manipulation of a qubit built from a synthetic nucleus
• A 750 mW, continuous-wave, solid-state laser source at 313 nm for cooling and manipulating trapped 9Be+ ions
• Origin of intrinsic dark count in superconducting nanowire single-photon detectors
• High-efficiency WSi superconducting nanowire single-photon detectors operating at 2.5 K
• Scalable simultaneous multi-qubit readout with 99.99% single-shot fidelity
• UV-sensitive superconducting nanowire single photon detectors for integration in an ion trap
• Different single photon response of wide and narrow superconducting MoSi strips
• Ball-grid array architecture for microfabricated ion traps
• Demonstration of integrated microscale optics in surface-electrode ion traps
• Temperature-dependence of detection efficiency in NbN and TaN SNSPD
• Optically probing the detection mechanism in a molybdenum silicide superconducting nanowire single-photon detector
• Transparent ion trap with integrated photodetector
• Scalable ion-photon quantum interface based on integrated diffractive mirrors
• A microfabricated surface ion trap on a high-finesse optical mirror
• Characterization of fluorescence collection optics integrated with a micro-fabricated surface electrode ion trap
• Superconducting nanowires as high-rate photon detectors in strong magnetic fields
• High-Fidelity Simultaneous Detection of Trapped Ion Qubit Register
• An Integrated Mirror and Surface Ion Trap with a Tunable Trap Location
• Cryogenic resonator design for trapped ion experiments in Paul traps

Cited by in corpus (35)

• A Race Track Trapped-Ion Quantum Processor
• Integrated multi-wavelength control of an ion qubit
• High-fidelity laser-free universal control of two trapped ion qubits
• Noisy intermediate-scale quantum computers
• A superconducting-nanowire single-photon camera with 400,000 pixels
• Fluorescence Detection of a Trapped Ion with a Monolithically Integrated Single-Photon-Counting Avalanche Diode
• High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes
• Multi-site Integrated Optical Addressing of Trapped Ions
• High-fidelity trapped-ion qubit operations with scalable photonic modulators
• Efficient qubit measurement with a nonreciprocal microwave amplifier
• 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
• High-Fidelity, Low-Loss State Detection of Alkali-Metal Atoms in Optical Tweezer Traps
• Quantum algorithms for scientific computing
• Integrated photonic structures for photon-mediated entanglement of trapped ions
• Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout
• Entangling gates for trapped-ion quantum computation and quantum simulation
• Generalized figure of merit for qubit readout
• Determination of Multi-mode Motional Quantum States in a Trapped Ion System
• Fabrication of Surface Ion Traps with Integrated Current Carrying Wires enabling High Magnetic Field Gradients
• A Fully Fiber-Integrated Ion Trap for Portable Optical Atomic Clocks
• Roadmap on Integrated Quantum Photonics
• Ablation loading of barium ions into a surface electrode trap
• Sculpting bosonic states with arithmetic subtractions
• High-precision tomography of ion qubits based on registration of fluorescent photons
• Atomic fluorescence collection into planar photonic devices
• Trap-integrated fluorescence detection based on silicon photomultipliers in a cryogenic Penning trap
• Test and characterization of multilayer ion traps on fused silica
• Volcano Architecture for Scalable Quantum Processor Units
• Fault Localization in a Microfabricated Surface Ion Trap using Diamond Nitrogen-Vacancy Center Magnetometry
• Improving quantum state detection with adaptive sequential observations
• A single-atom level mechano-optical transducer for ultrasensitive force sensing
• Combining processing throughput, low latency and timing accuracy in experiment control
• Phonon Number Measurement Using Optimal Composite Pulses
• Compatibility of trapped ions and dielectrics at cryogenic temperatures