Toward scalable ion traps for quantum information processing

Amini, Jason M.; Uys, Hermann; Wesenberg, J. H.; Seidelin, S.; Britton, J.; Bollinger, John J.; Leibfried, D.; Ospelkaus, C.; VanDevender, Aaron P.; Wineland, David J.

doi:10.1088/1367-2630/12/3/033031

Cited by 175 publications

(210 citation statements)

References 24 publications

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“…A number of proposals exist for a 2-D array of qubits with tunable nearest neighbor interactions [1][2][3][4]. Any 2-D topological quantum error correction code [5][6][7][8][9] and some 3-D codes [10,11] can be mapped with little or no overhead to such hardware.…”

mentioning

confidence: 99%

Analytic asymptotic performance of topological codes

Fowler

2013

Phys. Rev. A

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Topological quantum error correction codes are extremely practical, typically requiring only a 2-D lattice of qubits with tunable nearest neighbor interactions yet tolerating high physical error rates p. It is computationally expensive to simulate the performance of such codes at low p, yet this is a regime we wish to study as low physical error rates lead to low qubit overhead. We present a very general method of analytically estimating the low p performance of the most promising class of topological codes. Our method can handle arbitrary periodic quantum circuits implementing the error detection associated with this class of codes, and arbitrary Pauli error models for each type of quantum gate. Our analytic expressions take only seconds to obtain, versus hundreds of hours to perform equivalent low p simulations.

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confidence: 99%

Analytic asymptotic performance of topological codes

Fowler

2013

Phys. Rev. A

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“…They are effectively isolated atoms held at rest and largely free from perturbations, representing a quantum system with control over all degrees of freedom 1 . Thus, they have been used for studies in many fields of classical and nonclassical physics most prominently in quantum computing 2,3 , quantum information processing (QIP) [4][5][6] and precision metrology 7,8 . Very recently, trapped ions have been used to simulate the Dirac equation 9 and to demonstrate the phonon laser 10 .…”

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confidence: 99%

Wavelength-scale imaging of trapped ions using a phase Fresnel lens

et al. 2011

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A microfabricated phase Fresnel lens was used to image ytterbium ions trapped in a radio frequency Paul trap. The ions were laser cooled close to the Doppler limit on the 369.5 nm transition, reducing the ion motion so that each ion formed a near point source. By detecting the ion fluorescence on the same transition, near diffraction limited imaging with spot sizes of below 440 nm (FWHM) was achieved. This is the first demonstration of imaging trapped ions with a resolution on the order of the transition wavelength.

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“…In general, we find that boundary conditions and the induced currents in the entire trap structure have a profound influence. Ideally, future designs would be based on a multi-layer structure [25][26][27], so that signals could be delivered in layers underneath the structure via embedded waveguides and only brought to the surface close to the ion [28]. This would decouple the design of near-field structures from other trap "modules" on a scalable trap array [29] for quantum simulation [30,31] or quantum logic applications [32,33].…”

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confidence: 99%

Single-ion microwave near-field quantum sensor

Wahnschaffe

Hahn

Zarantonello

et al. 2017

Applied Physics Letters

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We develop an intuitive model of 2D microwave near-fields in the unusual regime of centimeter waves localized to tens of microns. Close to an intensity minimum, a simple effective description emerges with five parameters which characterize the strength and spatial orientation of the zero and first order terms of the near-field, as well as the field polarization. Such a field configuration is realized in a microfabricated planar structure with an integrated microwave conductor operating near 1 GHz. We use a single 9 Be + ion as a high-resolution quantum sensor to measure the field distribution through energy shifts in its hyperfine structure. We find agreement with simulations at the sub-micron and few-degree level. Our findings give a clear and general picture of the basic properties of oscillatory 2D near-fields with applications in quantum information processing, neutral atom trapping and manipulation, chip-scale atomic clocks, and integrated microwave circuits.PACS numbers: 03.67. Bg, 03.67.Lx, 37.10.Rs, 37.10.Ty, 37.90.+j Static or oscillatory electromagnetic fields have important applications in atomic and molecular physics for atom trapping and manipulation. Neutral atoms can be trapped in static magnetic fields in different types of magnetic traps [1]. Atomic ions can be trapped either in superpositions of static and oscillatory electric fields (Paul trap) or in superimposed static electromagnetic fields (Penning trap) [2]. Atom and molecule decelerators rely on the distortion of atomic energy levels by spatially inhomogeneous fields [3]. Common to all of these field configurations is that their basic properties can be well described in terms of static solutions to the field equations and that the behavior of the field near its intensity minimum is often critical to the application. Prominent examples include Majorana losses in neutral atom magnetic traps [1] and micromotion in Paul traps [4].Recently, motivated by advances in microfabricated atom traps, interest has grown in microwave near-fields which originate from microfabricated structures. Dimensions are typically small compared to the wavelength, but for the relatively high frequencies involved, eddy currents and phase effects become important, and the resulting field patterns are much richer than in the quasistatic case. Examples include rf potentials for neutral atoms [5] with applications in atom interferometry, quantum gates [6,7] and chip-scale atomic clocks [8] as well as microwave near-fields for trapped-ion quantum logic [9][10][11]. Also, neutral atomic clouds [12] and single ions [13] have been used to characterise near-fields at sub-mm length scales or measure magnetic field gradients [14]. The behavior of these high-frequency oscillatory fields may also become relevant for coupling atomic and molecular quantum systems to microwave circuits in the quantum regime [15,16]. Of particular importance in this context are 2D field configurations which can be realized e. g. in integrated waveguides. Notwithstanding the strong experimental int...

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Toward scalable ion traps for quantum information processing

Cited by 175 publications

References 24 publications

Analytic asymptotic performance of topological codes

Analytic asymptotic performance of topological codes

Wavelength-scale imaging of trapped ions using a phase Fresnel lens

Single-ion microwave near-field quantum sensor

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