Entanglement transport and a nanophotonic interface for atoms in optical tweezers

Đorđević, Tamara; Samutpraphoot, Polnop; Ocola, Paloma; Bernien, Hannes; Grinkemeyer, Brandon; Dimitrova, Ivana; Vuletić, Vladan; Lukin, Mikhail D.

doi:10.1126/science.abi9917

Cited by 79 publications

(40 citation statements)

References 48 publications

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“…Entanglement transport could also find use in metrological applications such as creating distributed states for probing gravitational gradients [53]. Finally, our approach can help facilitate quantum networking between separated arrays, paving the way toward large-scale quantum information systems [29,54] and distributed quantum metrology [53,55].…”

Section: Discussion and Outlookmentioning

confidence: 96%

“…Our transport protocol is optimized to suppress heating and loss by implementing cubicinterpolated atom trajectories (Methods), and is further accompanied by an 8-pulse XY8 robust dynamical decoupling sequence [28] to suppress dephasing. The resulting parity oscillations indicate that two-atom entanglement is unaffected by the transport process [20,29]. Performing this experiment as a function of movement speed shows that fidelity remains unchanged until the total separation speed becomes > 0.55 µm/µs, corresponding to the onset of atom loss (Fig.…”

Section: Entanglement Transport In Atom Arraysmentioning

confidence: 93%

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A quantum processor based on coherent transport of entangled atom arrays

Bluvstein,

Levine,

Semeghini

et al. 2021

Preprint

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The ability to engineer parallel, programmable operations between desired qubits within a quantum processor is central for building scalable quantum information systems [1,2]. In most stateof-the-art approaches, qubits interact locally, constrained by the connectivity associated with their fixed spatial layout. Here, we demonstrate a quantum processor with dynamic, nonlocal connectivity, in which entangled qubits are coherently transported in a highly parallel manner across two spatial dimensions, in between layers of single-and two-qubit operations. Our approach makes use of neutral atom arrays trapped and transported by optical tweezers; hyperfine states are used for robust quantum information storage, and excitation into Rydberg states is used for entanglement generation [3][4][5]. We use this architecture to realize programmable generation of entangled graph states such as cluster states and a 7-qubit Steane code state [6,7]. Furthermore, we shuttle entangled ancilla arrays to realize a surface code with 19 qubits [8] and a toric code state on a torus with 24 qubits [9]. Finally, we use this architecture to realize a hybrid analog-digital evolution [2] and employ it for measuring entanglement entropy in quantum simulations [10][11][12], experimentally observing non-monotonic entanglement dynamics associated with quantum many-body scars [13,14]. Realizing a long-standing goal, these results pave the way toward scalable quantum processing and enable new applications ranging from simulation to metrology.

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Section: Discussion and Outlookmentioning

confidence: 96%

Section: Entanglement Transport In Atom Arraysmentioning

confidence: 93%

A quantum processor based on coherent transport of entangled atom arrays

Bluvstein,

Levine,

Semeghini

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is problematic when Rydberg states are used for quantum logic since these states are strongly perturbed by electric fields arising from surface charges. This renders nanophotonic devices for strong atom-photon coupling [6][7][8][9] challenging to incorporate in node architectures that utilize Rydberg state operations.…”

Section: Introductionmentioning

confidence: 99%

An architecture for quantum networking of neutral atom processors

Young,

Safari,

Huft

et al. 2022

Preprint

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Development of a network for remote entanglement of quantum processors is an outstanding challenge in quantum information science. We propose and analyze a two-species architecture for remote entanglement of neutral atom quantum computers based on integration of optically trapped atomic qubit arrays with fast optics for photon collection. One of the atomic species is used for atom-photon entanglement, and the other species provides local processing. We compare the achievable rates of remote entanglement generation for two optical approaches: free space photon collection with a lens and a near-concentric, long working distance resonant cavity. Laser cooling and trapping within the cavity removes the need for mechanical transport of atoms from a source region, which allows for a fast repetition rate. Using optimized values of the cavity finesse, remote entanglement generation rates > 10 3 s −1 are predicted for experimentally feasible parameters.

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“…One common motivation is to deliver cold atoms to a 'science chamber' benefiting from a lower vacuum pressure and/or better optical access than a 'loading chamber' where a magneto-optical trap (MOT) is produced. Transport is also required to enable the interaction of cold atomic samples with in-vacuum microscopic devices such as optical microcavities [1][2][3][4][5][6] or micromechanical resonators [7][8][9], whose size precludes the direct loading of a MOT in their vicinity.…”

Section: Introductionmentioning

confidence: 99%

An optical elevator for precise delivery of cold atoms using an acousto-optical deflector

et al. 2022

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We implement a simple method for fast and precise delivery of ultracold atoms to a microscopic device, i.e. a Fabry–Perot microcavity. By moving a single beam optical dipole trap in a direction perpendicular to the beam axis with an acousto-optical deflector, we transport up to 1 million atoms within 100 ms over 1 cm. Under these conditions, a transport efficiency above 95% is achieved with only minimal heating. The atomic cloud is accurately positioned within the microcavity and transferred into an intra-cavity optical lattice. With the addition of a secondary guiding beam, we show how residual sloshing motion along the shallow axis of the trap can be minimized.

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Entanglement transport and a nanophotonic interface for atoms in optical tweezers

Cited by 79 publications

References 48 publications

A quantum processor based on coherent transport of entangled atom arrays

A quantum processor based on coherent transport of entangled atom arrays

An architecture for quantum networking of neutral atom processors

An optical elevator for precise delivery of cold atoms using an acousto-optical deflector

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