Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer

Jackson, N. C.; Hanley, R. K.; Hill, M.; Leroux, Frederic; Adams, Charles S.; Jones, Mike I

doi:10.21468/scipostphys.8.3.038

Cited by 15 publications

(11 citation statements)

References 52 publications

(103 reference statements)

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“…The second short-term prospect is the extension of the techniques that have so far been applied to alkali atoms to new atomic species with two valence electrons. Arrays of single Strontium [102][103][104] and Ytterbium [105] atoms have been reported recently. Although so far no quantum simulation has been performed with these novel systems, the richer internal structure of these species might allow new ways to manipulate, control and probe them [106,107].…”

Section: Perspectivesmentioning

confidence: 99%

Many-body physics with individually controlled Rydberg atoms

2020

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Over the last decade, systems of individually-controlled neutral atoms, interacting with each other when excited to Rydberg states, have emerged as a promising platform for quantum simulation of many-body problems, in particular spin systems. Here, we review the techniques underlying quantum gas microscopes and arrays of optical tweezers used in these experiments, explain how the different types of interactions between Rydberg atoms allow a natural mapping onto various quantum spin models, and describe recent results that were obtained with this platform to study quantum many-body physics. I. MANY-BODY PHYSICS WITH SYNTHETIC MATTERMany-body physics is the field that studies the behavior of ensembles of interacting quantum particles. This is a broad area encompassing almost all condensed matter physics, but also nuclear and high-energy physics. Despite the immense successes obtained over the last decades, many phenomena observed experimentally still do not have a fully satisfactory explanation. At the origin of the difficulty lies the exponential scaling of the size of the Hilbert space with the number of interacting particles. In practice, the best known ab-initio methods allow calculating the evolution of less than 50 particles. To investigate relevant questions involving a much larger number of particles (after all even 1 mg of usual matter contains already 10 18 atoms!), one must rely on approximations, and the art of solving the many-body problem largely relies on mastering them. However, using approximations is not always possible and it may be hard to assess their range of validity. One approach to move forward was suggested by Richard Feynman [1] and consists in building a synthetic quantum system in the lab, implementing a model of interest for which no other way to solve it is known. The model may be an approximate description of a real material, but it can also be a purely abstract one. In this case, its implementation leads to the construction of an artificial many-body system, which becomes an object of study in its own. One appealing feature of this approach is the ability to vary the parameters of the model in ranges inaccessible otherwise, thus providing a way to better understand their respective influence. For example, if one is interested in the influence of interatomic interactions on the phase of a given system, synthetic systems become interesting as they allow varying their strength in a way which is usually impossible in real materials. The approach introduced by Feynman is usually referred to as quantum simulation [2, 3], but it can be viewed more generally as exploring many-body physics with synthetic systems: in the same way chemists design new materials exhibiting interesting properties (such as magnetism, superconductivity. . . ), physicists assemble artificial systems and study their properties, with the hope to observe new phenomena.For a long time, this idea remained theoretical as the experimental control over quantum objects was not advanced enough. The situation changed radically...

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Section: Perspectivesmentioning

confidence: 99%

Many-body physics with individually controlled Rydberg atoms

2020

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“…Individually trapped neutral atoms with interactions mediated by highly-excited Rydberg states have become a prominent platform for quantum science [1][2][3]. Most research to date with arrays of neutral atoms has been conducted with alkali species, but alkaline earth(-like) atoms (AEAs) are gaining prominence after bosonic (I = 0) [4][5][6][7][8][9][10][11][12][13][14][15][16] and fermionic (I > 0) [17][18][19] isotopes recently joined this field. AEAs offer qualitative differences and quantitative advantages over alkalis.…”

Section: Introductionmentioning

confidence: 99%

Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins

Chen,

Li,

Huie

et al. 2022

Preprint

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Neutral alkaline earth(-like) atoms have recently been employed in atomic arrays with individual readout, control, and high-fidelity Rydberg-mediated entanglement. This emerging platform offers a wide range of new quantum science applications that leverage the unique properties of such atoms: ultra-narrow optical "clock" transitions and isolated nuclear spins. Specifically, these properties offer an optical qubit (o) as well as ground (g) and metastable (m) nuclear spin qubits, all within a single atom. We consider experimentally realistic control of this omg architecture and its coupling to Rydberg states for entanglement generation, focusing specifically on ytterbium-171 ( 171 Yb) with nuclear spin I = 1/2. We analyze the S-series Rydberg states of 171 Yb, described by the three spin-1/2 constituents (two electrons and the nucleus). We confirm that the F = 3/2 manifold -a unique spin configuration -is well suited for entangling nuclear spin qubits. Further, we analyze the F = 1/2 series -described by two overlapping spin configurations -using a multichannel quantum defect theory. We study the multilevel dynamics of the nuclear spin states when driving the clock or Rydberg transition with Rabi frequency Ωc = 2π×200 kHz or ΩR = 2π×6 MHz, respectively, finding that a modest magnetic field (≈ 200 G) and feasible laser polarization intensity purity ( 0.99) are sufficient for gate fidelities exceeding 0.99.

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“…In addition, optical tweezers have led to significant progress in the fields of quantum simulation [20] and quantum information processing [21,22] with individually controlled neutral atoms, where excitation to highly excited Rydberg states is utilised to engineer long-range interactions between the particles. In recent years, tweezer control has been extended beyond alkali-metal atoms to alkaline earth and alkaline-earth-like atoms [23,24,25,26] further enriching the systems and tools available to experimentalists.…”

Section: Introductionmentioning

confidence: 99%

Preparation of one $^{87}$Rb and one $^{133}$Cs atom in a single optical tweezer

Brooks,

Spence,

Guttridge

et al. 2021

Preprint

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We report the preparation of exactly one 87 Rb atom and one 133 Cs atom in the same optical tweezer as the essential first step towards the construction of a tweezer array of individually trapped 87 Rb 133 Cs molecules. Through careful selection of the tweezer wavelengths, we show how to engineer species-selective trapping potentials suitable for high-fidelity preparation of Rb + Cs atom pairs. Using a wavelength of 814 nm to trap Rb and 938 nm to trap Cs, we achieve loading probabilities of 0.508(6) for Rb and 0.547(6) for Cs using standard red-detuned molasses cooling. Loading the traps sequentially yields exactly one Rb and one Cs atom in 28.4(6) % of experimental runs. Using a combination of an acousto-optic deflector and a piezo-controlled mirror to control the relative position of the tweezers, we merge the two tweezers, retaining the atom pair with a probability of 0.99 (+0.01) (−0.02) . We use this capability to study hyperfine-state-dependent collisions of Rb and Cs in the combined tweezer and compare the measured two-body loss rates with coupled-channel quantum scattering calculations.

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Number-resolved imaging of $^{88}$Sr atoms in a long working distance optical tweezer

Cited by 15 publications

References 52 publications

Many-body physics with individually controlled Rydberg atoms

Many-body physics with individually controlled Rydberg atoms

Analyzing the Rydberg-based omg architecture for $^{171}$Yb nuclear spins

Preparation of one $^{87}$Rb and one $^{133}$Cs atom in a single optical tweezer

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