Two-Dimensional Programmable Tweezer Arrays of Fermions

Yan, Zoe; Spar, Benjamin M.; Prichard, Max L.; Chi, Sungjae; Wei, Haotian; Ibarra-García-Padilla, Eduardo; Hazzard, Kaden R. A.; Bakr, Waseem

doi:10.1103/physrevlett.129.123201

Cited by 27 publications

(24 citation statements)

References 51 publications

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“…This is a crucial prerequisite for capitalizing on the indistinguishability of (fermionic) atoms, which requires the possibility for their center-of-mass wave functions to overlap, e.g., by coherently delocalizing atoms across tweezers. Remarkably, this motional control has already been demonstrated in pioneering proof-of-principle experiments both with tweezers and double-well optical potentials ( 52 – 59 ). Below, we describe a blueprint of the elements required for such a fermionic quantum processor ( 8 ), where both quantum hardware and software are codesigned to efficiently simulate fermionic models.…”

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confidence: 78%

Fermionic quantum processing with programmable neutral atom arrays

González-Cuadra,

Bluvstein,

Kalinowski

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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Simulating the properties of many-body fermionic systems is an outstanding computational challenge relevant to material science, quantum chemistry, and particle physics.-5.4pc]Please note that the spelling of the following author names in the manuscript differs from the spelling provided in the article metadata: D. González-Cuadra, D. Bluvstein, M. Kalinowski, R. Kaubruegger, N. Maskara, P. Naldesi, T. V. Zache, A. M. Kaufman, M. D. Lukin, H. Pichler, B. Vermersch, Jun Ye, and P. Zoller. The spelling provided in the manuscript has been retained; please confirm. Although qubit-based quantum computers can potentially tackle this problem more efficiently than classical devices, encoding nonlocal fermionic statistics introduces an overhead in the required resources, limiting their applicability on near-term architectures. In this work, we present a fermionic quantum processor, where fermionic models are locally encoded in a fermionic register and simulated in a hardware-efficient manner using fermionic gates. We consider in particular fermionic atoms in programmable tweezer arrays and develop different protocols to implement nonlocal gates, guaranteeing Fermi statistics at the hardware level. We use this gate set, together with Rydberg-mediated interaction gates, to find efficient circuit decompositions for digital and variational quantum simulation algorithms, illustrated here for molecular energy estimation. Finally, we consider a combined fermion-qubit architecture, where both the motional and internal degrees of freedom of the atoms are harnessed to efficiently implement quantum phase estimation as well as to simulate lattice gauge theory dynamics.

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confidence: 78%

Fermionic quantum processing with programmable neutral atom arrays

González-Cuadra,

Bluvstein,

Kalinowski

et al. 2023

Proc. Natl. Acad. Sci. U.S.A.

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“…The next frontier is combining both techniques and their respective benefits-addressability of tweezers and disorder-free, narrowly spaced potentials of lattices. Such a combination could revolutionize neutral-atom quantum technologies and several studies have been promoting this goal [22,23]. However, the fundamental mismatch in interatomic spacing between the two platforms has yet to be overcome.…”

Section: Introductionmentioning

confidence: 99%

An accordion superlattice for controlling atom separation in optical potentials

2023

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We propose a method for separating trapped atoms in optical lattices by large distances. The key idea is the cyclic transfer of atoms between two lattices of variable spacing, known as `accordion lattices', each covering at least a factor of two in lattice spacing. By coherently loading atoms between the two superimposed potentials, we can reach, in principle, arbitrarily large atom separations, while requiring only a relatively small numerical aperture. Numerical simulations of our `accordion superlattice' show that the atoms remain localised to one lattice site throughout the separation process, even for moderate lattice depths. In a proof-of-principle experiment we demonstrate the optical fields required for the accordion superlattice using acousto-optic deflectors. The method can be applied to neutral-atom quantum computing with optical tweezers, as well as quantum simulation of low-entropy many-body states. For instance, a unit-filling atomic Mott insulator can be coherently expanded by a factor of ten in order to load an optical tweezer array with very high filling. In turn, sorted tweezer arrays can be compressed to form high-density states of ultracold atoms in optical lattices. The method can also be applied to biological systems where dynamical separation of particles is required.

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confidence: 99%

Tunnel‐Coupled Optical Microtraps for Ultracold Atoms

Zhu,

Long,

Gou

et al. 2023

Adv Quantum Tech

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Arrays of individual atoms trapped in optical microtraps with micrometer‐scale sizes have emerged as a fundamental, versatile, and powerful platform for quantum sciences and technologies. This platform enables the bottom‐up engineering of quantum systems, offering the capability of low‐entropy preparation of quantum states with flexible geometry, as well as manipulation and detection at the single‐site level. The utilization of ultracold itinerant atoms with tunnel coupling in optical microtraps provides new opportunities for quantum simulation, enabling the exploration of exotic quantum states, phases, and dynamics, which would otherwise be challenging to achieve in conventional optical lattices due to high entropy and limited geometric flexibility. Here, the development of tunnel‐coupled optical microtraps for the manipulation of ultracold atomic quantum systems and its recent advances are briefly reviewed.

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Two-Dimensional Programmable Tweezer Arrays of Fermions

Cited by 27 publications

References 51 publications

Fermionic quantum processing with programmable neutral atom arrays

Fermionic quantum processing with programmable neutral atom arrays

An accordion superlattice for controlling atom separation in optical potentials

Tunnel‐Coupled Optical Microtraps for Ultracold Atoms

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