Emergent Quantum Randomness and Benchmarking from Hamiltonian Many-body Dynamics

Choi, Joonhee; Shaw, Adam L.; Madjarov, Ivaylo S.; Xie, Xing; Finkelstein, Ran; Covey, Jacob P.; Cotler, Jordan; Mark, Daniel K.; Huang, Hsin-Yuan; Kale, Anant; Pichler, Hannes; Brandão, Fernando G. S. L.; Choi, Soonwon; Endres, Manuel

doi:10.48550/arxiv.2103.03535

Cited by 25 publications

(52 citation statements)

References 53 publications

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“…spin qubit rotations. This approach complements a recent work employing quasi-local 'scrambled' unitaries generated by Rydberg interactions, and used for benchmarking and fidelity estimation [25]. Our approach fully relies on experimental tools that are currently available.…”

Section: Introductionmentioning

confidence: 97%

A randomized measurement toolbox for Rydberg quantum technologies

Notarnicola¹,

Elben²,

Lahaye³

et al. 2021

Preprint

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We present a toolbox to probe quantum many-body states implemented on Rydberg-atoms quantum hardware via randomized measurements. We illustrate the efficacy of this measurement toolbox in the context of probing entanglement, via the estimation of the purity, and of verifying a groundstate preparation using measurements of the Hamiltonian variance. To achieve this goal, we develop and discuss in detail a protocol to realize independent, local unitary rotations. We benchmark the protocol by investigating the ground state of the one-dimensional SSH model, recently realized on a chain of Rydberg atom. We probe the robustness of our toolbox by taking into account experimental imperfections, such as pulse fluctuations and measurement errors.

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Section: Introductionmentioning

confidence: 97%

A randomized measurement toolbox for Rydberg quantum technologies

Notarnicola¹,

Elben²,

Lahaye³

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…In recent years, this approach has been used to study quantum phase transitions [3,4] and probe novel phases of matter [5] in large, two-dimensional systems. At the same time, the performance of quantum gate operations is also improving rapidly [6,7], allowing the generation of many-qubit entanglement [8] and new approaches to quantum state tomography and benchmarking [9].…”

Section: Introductionmentioning

confidence: 99%

Universal gate operations on nuclear spin qubits in an optical tweezer array of $^{171}$Yb atoms

Ma,

Burgers,

Liu

et al. 2021

Preprint

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Neutral atom arrays are a rapidly developing platform for quantum science. In this work, we demonstrate a universal set of quantum gate operations on a new type of neutral atom qubit: a nuclear spin in an alkaline earth-like atom (AEA), 171 Yb. We present techniques for cooling, trapping and imaging using a newly discovered magic trapping wavelength at λ = 486.78 nm. We implement qubit initialization, readout, and single-qubit gates, and observe long qubit lifetimes, T1 ≈ 20 s and T * 2 = 1.24(5) s, and a single-qubit operation fidelity F1Q = 0.99959(6). We also demonstrate two-qubit entangling gates using the Rydberg blockade, as well as coherent control of these gate operations using light shifts on the Yb + ion core transition at 369 nm. These results are a significant step towards highly coherent quantum gates in AEA tweezer arrays.

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“…Key features of this approach are bottom-up control afforded by optical tweezer technology [1][2][3] and strong, controllable interactions via Rydberg excitations [4,5]. In recent years, this platform has been used to microscopically probe the properties and dynamics of quantum phase transitions [6][7][8][9], to generate and probe large-scale entangled states [10,11], and implement high-fidelity gate operations in multi-qubit arrays [12][13][14].…”

mentioning

confidence: 99%

Controlling Rydberg excitations using ion core transitions in alkaline earth atom tweezer arrays

Burgers,

Ma,

Saskin

et al. 2021

Preprint

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Emergent Quantum Randomness and Benchmarking from Hamiltonian Many-body Dynamics

Cited by 25 publications

References 53 publications

A randomized measurement toolbox for Rydberg quantum technologies

A randomized measurement toolbox for Rydberg quantum technologies

Universal gate operations on nuclear spin qubits in an optical tweezer array of $^{171}$Yb atoms

Controlling Rydberg excitations using ion core transitions in alkaline earth atom tweezer arrays

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