In situ single-atom array synthesis using dynamic holographic optical tweezers

Kim, Hyosub; Lee, Woojun; Lee, Han-Gyeol; Jo, Hanlae; Song, Yunheung; Ahn, Jaewook

doi:10.1038/ncomms13317

Cited by 219 publications

(161 citation statements)

References 42 publications

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“…[20] for a few atoms, and revisited recently in [21,22], consists in sorting disordered arrays of atoms using moving optical potentials [23]. Here we demonstrate the deterministic preparation of arrays as large as N ∼ 50 individual atoms in arbitrary 2d geometries, with filling fractions η up to 98%; thus enabling us to achieve defect-free arrays with a fast repetition rate.…”

Section: A Different Approach Towards This Goal Pioneered Inmentioning

confidence: 98%

An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays

Barredo

Léséleuc

Lienhard

et al. 2016

Science

804

705

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Large arrays of individually controlled atoms trapped in optical tweezers are a very promising platform for quantum engineering applications. However, to date, only disordered arrays have been demonstrated, due to the non-deterministic loading of the traps. Here, we demonstrate the preparation of fully loaded, two-dimensional arrays of up to ∼ 50 microtraps each containing a single atom, and arranged in arbitrary geometries. Starting from initially larger, half-filled matrices of randomly loaded traps, we obtain user-defined target arrays at unit filling. This is achieved with a real-time control system and a moving optical tweezers that performs a sequence of rapid atom moves depending on the initial distribution of the atoms in the arrays. These results open exciting prospects for quantum engineering with neutral atoms in tunable geometries.The last decade has seen tremendous progress over the control of individual quantum objects [1, 2]. Many experimental platforms, from trapped ions [3] to superconducting qubits [4], are actively explored. The current challenge is now to extend these results towards large assemblies of such objects, while keeping the same degree of control, in view of applications in quantum information processing [5], quantum metrology [6], or quantum simulation [7]. Neutral atoms offer some advantages over other systems for these tasks. Besides being well isolated from the environment and having tunable interactions, systems of cold atoms hold the promise of being scalable to hundreds of individually controlled qubits. Control of the atomic positions at the single-particle level can been achieved with optical potentials. In a 'top-down' approach using optical lattices and quantum gas microscopes, hundreds of traps can now be created and addressed individually [8]. By making use of the superfluid to Mott-insulator transition, single atom filling fractions exceeding 90% are achieved [9], albeit at the expense of relatively long experimental duty cycles and constraints in the lattice geometries.Single atoms can also be trapped in 2d arrays of microscopic optical tweezers with single-site resolution using holographic methods [10][11][12]. This bottom-up approach offers faster preparation and a higher degree of tunability of the underlying geometry. However, achieving unit filling of the arrays is hampered by the stochastic nature of the loading and has remained so far elusive. Although proof-of-principle demonstrations of quantum gates [13] and quantum simulations [14] using this latter platform have been reported [15], this non-deterministic loading poses a serious limitation for applications where large-scale ordered arrays are required. To solve this problem, several approaches have been considered, exploiting the Rydberg blockade mechanism [16], or using tailored light-assisted collisions [17]. To date, despite those efforts, loading efficiencies of around 90% at best for a single atom in a single tweezers could be achieved [18,19], making the probabilities to fully load large arrays still...

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Section: A Different Approach Towards This Goal Pioneered Inmentioning

confidence: 98%

An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays

Barredo

Léséleuc

Lienhard

et al. 2016

Science

804

705

View full text Add to dashboard Cite

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“…Large arrays of dipole traps have been produced using optical lattices [10] and microlens arrays [11,12], however, in all these systems, the trapping sites can only be moved in unison, not individually. Several approaches have been tried for creating reconfigurable traps, for example, acousto-optic deflectors (AODs) [13][14][15] and liquid crystal spatial light modulators (SLMs) [16][17][18]. AODs are fast but can only move traps in one dimension at a time.…”

Section: Introductionmentioning

confidence: 99%

Single-atom trapping and transport in DMD-controlled optical tweezers

Stuart

Kuhn

2018

New J. Phys.

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We demonstrate the trapping and manipulation of single neutral atoms in reconfigurable arrays of optical tweezers. Our approach offers unparalleled speed by using a Texas instruments digital micromirror device as a holographic amplitude modulator with a frame rate of 20 000 per second. We show the trapping of static arrays of up to 20 atoms, as well as transport of individually selected atoms over a distance of 25 μm with laser cooling and 4 μm without. We discuss the limitations of the technique and the scope for technical improvements.

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“…III.B. Such a method seems promising in light of separate successful efforts in recent years to load individual atoms into arrays of optical tweezers in free space (Muldoon et al, 2012;Nogrette et al, 2014;Lester et al, 2015;Kim et al, 2016), and to even deterministically realize arrays without "defect" vacancies (Barredo et al, 2016;Endres et al, 2016). Adapting such techniques to the side-illumination scheme could in principle enable ordered arrays of atoms to be trapped near and coupled to nanophotonic structures.…”

Section: A Overview Of Optical Traps For Nanophotonicsmentioning

confidence: 99%

Colloquium : Quantum matter built from nanoscopic lattices of atoms and photons

et al. 2018

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This Colloquium describes a new paradigm for creating strong quantum interactions of light and matter by way of single atoms and photons in nanoscopic lattices. Beyond the possibilities for quantitative improvements for familiar phenomena in atomic physics and quantum optics, there is a growing research community that is exploring novel quantum phases and phenomena that arise from atom-photon interactions in one-and two-dimensional nanophotonic lattices. Nanophotonic structures offer the intriguing possibility to control atom-photon interactions by engineering the medium properties through which they interact. An important aspect of these new research lines is that they have become possible only by pushing the state-of-the-art capabilities in nanophotonic device fabrication and by the integration of these capabilities into the realm of ultracold atoms. This Colloquium attempts to inform a broad physics community of the emerging opportunities in this new field on both theoretical and experimental fronts. The research is inherently multidisciplinary, spanning the fields of nanophotonics, atomic physics, quantum optics, and condensed matter physics.

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In situ single-atom array synthesis using dynamic holographic optical tweezers

Cited by 219 publications

References 42 publications

An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays

An atom-by-atom assembler of defect-free arbitrary two-dimensional atomic arrays

Single-atom trapping and transport in DMD-controlled optical tweezers

Colloquium : Quantum matter built from nanoscopic lattices of atoms and photons

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