Universal Gate Operations on Nuclear Spin Qubits in an Optical Tweezer Array of 
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 Atoms

Ma, Shuo; Burgers, A. P.; Liu, Genyue; Wilson, Jack T.; Zhang, Bichen; Thompson, J. D.

doi:10.1103/physrevx.12.021028

Cited by 62 publications

(25 citation statements)

References 48 publications

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“…For twoqubit gates via Rydberg interactions, the dominant sources of gate errors are the ground-Rydberg Doppler dephasing, the spontaneous emission from the intermediate state in the two-photon excitation process, and the excitation laser phase noise [775]. In the 87 Rb atom arrays, the fidelities of the two-qubit entanglement operations have been extracted to be by suppressing Rydberg laser phase noise via a reference cavity [786,787]. In an array of 171 Yb atoms, a two-qubit gate with the fidelity of has been firstly demonstrated in [788].…”

Section: % 90%mentioning

confidence: 99%

Noisy intermediate-scale quantum computers

Cheng

Deng

et al. 2023

Front. Phys.

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Quantum computers have made extraordinary progress over the past decade, and significant milestones have been achieved along the path of pursuing universal fault-tolerant quantum computers. Quantum advantage, the tipping point heralding the quantum era, has been accomplished along with several waves of breakthroughs. Quantum hardware has become more integrated and architectural compared to its toddler days. The controlling precision of various physical systems is pushed beyond the fault-tolerant threshold. Meanwhile, quantum computation research has established a new norm by embracing industrialization and commercialization. The joint power of governments, private investors, and tech companies has significantly shaped a new vibrant environment that accelerates the development of this field, now at the beginning of the noisy intermediate-scale quantum era. Here, we first discuss the progress achieved in the field of quantum computation by reviewing the most important algorithms and advances in the most promising technical routes, and then summarizing the next-stage challenges. Furthermore, we illustrate our confidence that solid foundations have been built for the fault-tolerant quantum computer and our optimism that the emergence of quantum killer applications essential for human society shall happen in the future.

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Section: % 90%mentioning

confidence: 99%

Noisy intermediate-scale quantum computers

Cheng

Deng

et al. 2023

Front. Phys.

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“…ẋ(t) = v(t), v(t) = F (t)/m with F (t) = mω 2 x(t), with random initial position x(0) and velocity v(0) sampled from a Maxwell-Boltzmann distribution, which is an approximation to the full quantum mechanical problem. Calculations are performed assuming realistic experimental parameters for 171 Yb atoms, including a qubit transition wavelength of 578 nm (standing wave period 289 nm), trap frequency of ω/2π = 100 kHz (trap period τ = 10 µs) and a temperature of 5 µK based on current experiments [20,14,21,22]. The average infidelity of each gate, for different gate times T , was obtained by averaging the infidelity 1 − F obtained from the unitary evolution over 2000 classical trajectories.…”

Section: Otw-1 Osw-1 Osw-bb1mentioning

confidence: 99%

Robust phase-controlled gates for scalable atomic quantum processors using optical standing waves

Whitlock

2023

Quantum

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A simple scheme is presented for realizing robust optically controlled quantum gates for scalable atomic quantum processors by driving the qubits with optical standing waves. Atoms localized close to the antinodes of the standing wave can realize phase-controlled quantum operations that are potentially more than an order of magnitude less sensitive to the local optical phase and atomic motion than corresponding travelling wave configurations. The scheme is compatible with robust optimal control techniques and spatial qubit addressing in atomic arrays to realize phase controlled operations without the need for tight focusing and precise positioning of the control lasers. This will be particularly beneficial for quantum gates involving Doppler sensitive optical frequency transitions and provides an all optical route to scaling up atomic quantum processors.

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“…Leveraging these features in multi-electron atoms has been a principal factor enabling record-setting optical lattice [66][67][68][69] and tweezer clocks [70,71], analog manybody simulators of SU(N ) and multiorbital Hamiltonians [72][73][74][75][76][77], advanced atom interferometers [78], high-fidelity entangling gates [64,79,80], and telecom-compatible quantum transducers and memories [81][82][83][84][85].…”

Section: Introductionmentioning

confidence: 99%