High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes

Reens, David; Collins, Michael; Ciampi, Joseph; Kharas, Dave; Aull, Brian F.; Donlon, Kevan; Bruzewicz, Colin; Felton, Bradley; Stuart, Jules; Niffenegger, Robert; Rich, P.; Braje, Danielle; Ryu, Kevin; Chiaverini, John; McConnell, Robert

doi:10.1103/physrevlett.129.100502

Cited by 16 publications

(9 citation statements)

References 34 publications

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“…Single qubit rotations and two-qubit entangling gates have been implemented using laser beams delivered through waveguides [475,476], showing extreme robustness against vibrational noises. Furthermore, the integration of single photon detectors on chip traps has been successfully demonstrated recently [407][408][409], showing a scalable way for high-fidelity readout of multiple ion qubits on large-scale quantum processors. Conventional analogue voltage sources are also integrated on-chip [477], enabling an expandable approach to control numerous ion trap electrodes and laying the technical foundation for circuit integration in large-scale QCCD architectures.…”

Section: Trapped-ion Qubitsmentioning

confidence: 99%

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Noisy intermediate-scale quantum computers

Cheng

Deng

et al. 2023

Front. Phys.

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Quantum computers have made extraordinary progress over the past decade, and significant milestones have been achieved along the path of pursuing universal fault-tolerant quantum computers. Quantum advantage, the tipping point heralding the quantum era, has been accomplished along with several waves of breakthroughs. Quantum hardware has become more integrated and architectural compared to its toddler days. The controlling precision of various physical systems is pushed beyond the fault-tolerant threshold. Meanwhile, quantum computation research has established a new norm by embracing industrialization and commercialization. The joint power of governments, private investors, and tech companies has significantly shaped a new vibrant environment that accelerates the development of this field, now at the beginning of the noisy intermediate-scale quantum era. Here, we first discuss the progress achieved in the field of quantum computation by reviewing the most important algorithms and advances in the most promising technical routes, and then summarizing the next-stage challenges. Furthermore, we illustrate our confidence that solid foundations have been built for the fault-tolerant quantum computer and our optimism that the emergence of quantum killer applications essential for human society shall happen in the future.

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Section: Trapped-ion Qubitsmentioning

confidence: 99%

“…(f) On-chip detection of ion qubit. Several groups have been successfully demonstrated integrated single photon detector on the fabricated surface traps[407][408][409].…”

mentioning

confidence: 99%

Noisy intermediate-scale quantum computers

Cheng

Deng

et al. 2023

Front. Phys.

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“…17 Other demonstrations of SPAD-integrated surface traps soon followed. 18 The optically sensitive area, the anode, of the SPAD is created by implanting a high concentration of Boron in the N-doped silicon. To control the edge breakdown in the SPADs, an area around the anode is implanted with a lower concentration of Boron called the "guard ring".…”

Section: Single-photon Avalanche Detectorsmentioning

confidence: 99%

Integrated photonics for trapped ion quantum information experiments at Sandia National Laboratories

McGuinness

Gehl

Hogle

et al. 2022

Quantum Nanophotonic Materials, Devices, and Systems 2022

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As trapped ion systems add more ions to allow for increasingly sophisticated quantum processing and sensing capabilities, the traditional optical-mechanical laboratory infrastructure that make such systems possible are in some cases the limiting factor in further growth of the systems. One promising solution is to integrate as many, if not all, optical components such as waveguides and gratings, single-photon detectors, and high extinction ratio optical switches/modulators either into ion traps themselves or into auxiliary devices that can be easily integrated with ion traps. Here we report on recent efforts at Sandia National Laboratories to include integrated photonics in our surface ion trap platforms.

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“…The simultaneous requirements on field of view, numerical aperture, off-axis aberration, magnification, and physical dimensions of the collection optics present challenges when scaling this architecture to large numbers of ions. Applications such as scaled trapped-ion quantum computing [3][4][5] may benefit from the integration of multiple photon detectors for fluorescence detection into the ion trap itself, without requiring optical elements for imaging [6][7][8][9] .…”

mentioning

confidence: 99%

“…Trap-integrated SPADs also suffer from the same rf pickup effects, however, and have much higher dark count rates and lower quantum efficiencies than SNSPDs. SPAD output pulses also cause more heating of the ion motion than SNSPD pulses due to their larger amplitude [7][8][9] .…”

mentioning

confidence: 99%

Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout

Hampel¹,

Slichter²,

Leibfried³

et al. 2023

Preprint

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State readout of trapped-ion qubits with trap-integrated detectors can address important challenges for scalable quantum computing, but the strong rf electric fields used for trapping can impact detector performance. Here, we report on NbTiN superconducting nanowire single-photon detectors (SNSPDs) employing grounded aluminum mirrors as electrical shielding that are integrated into linear surface-electrode rf ion traps. The shielded SNSPDs can be successfully operated at applied rf trapping potentials of up to 54 V peak at 70 MHz and temperatures of up to 6 K, with a maximum system detection efficiency of 68 %. This performance should be sufficient to enable parallel high-fidelity state readout of a wide range of trapped ion species in typical cryogenic apparatus.

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High-Fidelity Ion State Detection Using Trap-Integrated Avalanche Photodiodes

Cited by 16 publications

References 34 publications

Noisy intermediate-scale quantum computers

Noisy intermediate-scale quantum computers

Integrated photonics for trapped ion quantum information experiments at Sandia National Laboratories

Trap-Integrated Superconducting Nanowire Single-Photon Detectors with Improved RF Tolerance for Trapped-Ion Qubit State Readout

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