Distance scaling and polarization of electric-field noise in a surface ion trap

An, Da; Matthiesen, Clemens; Urban, Erik; Häffner, Hartmut

doi:10.1103/physreva.100.063405

Cited by 21 publications

(21 citation statements)

References 36 publications

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“…different secular frequencies. It was found that the dependence of the heating rates on the secular frequencies is not consistent with a proper power-law behavior, as would be expected for anomalous heating originating from surface heating 85 . This indicates that at least the transverse modes are predominantly affected by technical noise.…”

Section: Ion Heatingmentioning

confidence: 77%

Shuttling-based trapped-ion quantum information processing

Kaushal

Lekitsch

Stahl

et al. 2020

AVS Quantum Science

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Moving trapped-ion qubits in a microstructured array of radiofrequency traps offers a route towards realizing scalable quantum processing nodes. Establishing such nodes, providing sufficient functionality to represent a building block for emerging quantum technologies, e.g. a quantum computer or quantum repeater, remains a formidable technological challenge. In this review, we present a holistic view on such an architecture, including the relevant components, their characterization and their impact on the overall system performance. We present a hardware architecture based on a uniform linear segmented multilayer trap, controlled by a custom-made fast multi-channel arbitrary waveform generator. The latter allows for conducting a set of different ion shuttling operations at sufficient speed and quality. We describe the relevant parameters and performance specifications for microstructured ion traps, waveform generators and additional circuitry, along with suitable measurement schemes to verify the system performance. Furthermore, a set of different basic shuttling operations for dynamic qubit register reconfiguration is described and characterized in detail.arXiv:1912.04712v1 [quant-ph]

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Section: Ion Heatingmentioning

confidence: 77%

Shuttling-based trapped-ion quantum information processing

Kaushal

Lekitsch

Stahl

et al. 2020

AVS Quantum Science

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“…We can normalize our measured heating rate for ion mass and trap frequency to compare with community data [16,21,22]. To do so, we consider the heating rate given by ṅ = q 2 4m ω S E where q is the charge of the ion, m is the mass of the ion, ω is the motional frequency, [14,15,22].…”

Section: Heating Ratesmentioning

confidence: 99%

“…Figure 5 shows our results as we scan the frequency from 2π×2.5 The heating rate has been normalized for ion mass and secular motional trap frequency. We plot our data as the green star compared to previously published data from [14] (black circles), [22] (blue squares), and [15] (red diamonds). The scaling of each fit is indicated in the legend.…”

Section: Heating Ratesmentioning

confidence: 99%

Integrated optical addressing of a trapped ytterbium ion

Ivory,

Setzer,

Karl

et al. 2020

Preprint

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We report on the characterization of heating rates and photo-induced electric charging on a microfabricated surface ion trap with integrated waveguides. Microfabricated surface ion traps have received considerable attention as a quantum information platform due to their scalability and manufacturability. Here we characterize the delivery of 435 nm light through waveguides and diffractive couplers to a single ytterbium ion in a compact trap. We measure an axial heating rate at room temperature of 0.78±0.05 q/ms and see no increase due to the presence of the waveguide. Furthermore, the electric field due to charging of the exposed dielectric outcoupler settles under normal operation after an initial shift. The frequency instability after settling is measured to be 0.9 kHz.

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“…where f (T ) is a function of the temperature. 4 Although aspects of this functional form and its exponents are still a subject of debate, 4,24 most experiments point to a frequency scaling involving an α of between 0 and 2 at MHz frequencies. 3,[25][26][27][28][29] This scaling is in line with the practical experience that most sources of noise have a "1/ω" character with α = 1.…”

Section: Introductionmentioning

confidence: 99%

How Correlated Adsorbate Dynamics on Realistic Substrates Can Give Rise to 1/ω Electric-Field Noise in Surface Ion Traps

Foulon,

Ray,

Kim

et al. 2021

Preprint

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Ion traps are promising architectures for implementing scalable quantum computing, but they suffer from excessive "anomalous" heating that prevents their full potential from being realized. This heating, which is orders of magnitude larger than that expected from Johnson-Nyquist noise, results in ion motion that leads to decoherence and reduced fidelity in quantum logic gates. The exact origin of anomalous heating is an open question, but experiments point to adsorbates on trap electrodes as a likely source. Many different models of anomalous heating have been proposed, but these models have yet to pinpoint the atomistic origin of the experimentally-observed 1/ω electric field noise scaling observed in ion traps at frequencies between 0.1-10 MHz. In this work, we perform the first computational study of the ion trap electric field noise produced by the motions of multiple monolayers of adsorbates described by first principles potentials. In so doing, we show that correlated adsorbate motions play a definitive role in producing 1/ω noise and identify candidate collective adsorbate motions, including translational and rotational motions of adsorbate patches and multilayer exchanges, that give rise to 1/ω scaling at the MHz frequencies typically employed in ion traps. These results demonstrate that multi-adsorbate systems, even simple ones, can give rise to a set of activated motions that can produce the 1/ω noise observed in ion traps and that collective, rather than individual, adsorbate motions are much more likely to give rise to low-frequency heating.

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Distance scaling and polarization of electric-field noise in a surface ion trap

Cited by 21 publications

References 36 publications

Shuttling-based trapped-ion quantum information processing

Shuttling-based trapped-ion quantum information processing

Integrated optical addressing of a trapped ytterbium ion

How Correlated Adsorbate Dynamics on Realistic Substrates Can Give Rise to 1/ω Electric-Field Noise in Surface Ion Traps

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