Author Correction: High-fidelity entanglement and detection of alkaline-earth Rydberg atoms

Madjarov, Ivaylo S.; Covey, Jacob P.; Shaw, Adam L.; Choi, Joonhee; Kale, Anant; Cooper, Alexandre; Pichler, Hannes; Schkolnik, Vladimir; Williams, Jason; Endres, Manuel

doi:10.1038/s41567-020-01097-9

Cited by 4 publications

(3 citation statements)

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“…Rydberg atoms trapped in optical tweezers represent one promising platform for realizing a quantum computer [19][20][21][22][23][24][25]. The Rydberg architecture has been impressively improved in various aspects over the last years and the execution of quantum algorithms of increasing complexity and circuit depth is in sight: recent Rydberg experiments have demonstrated two-qubit gate fidelities beyond 98% [26][27][28][29]. A key ingredient to increasing the final computation quality and the achievable circuit complexity is evidently the ability to run gates in parallel.…”

mentioning

confidence: 99%

Ab-initio tree-tensor-network digital twin for quantum computer benchmarking in 2D

Jaschke,

Pagano,

Weber

et al. 2024

Quantum Sci. Technol.

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Large-scale numerical simulations of the Hamiltonian dynamics of a Noisy Intermediate ScaleQuantum (NISQ) computer – a digital twin – could play a major role in developing efficient andscalable strategies for tuning quantum algorithms for specific hardware. Via a two-dimensionaltensor network digital twin of a Rydberg atom quantum computer, we demonstrate the feasibil-ity of such a program. In particular, we quantify the effects of gate crosstalks induced by thevan der Waals interaction between Rydberg atoms: according to an 8×8 digital twin simulationbased on the current state-of-the-art experimental setups, the initial state of a five-qubit repetitioncode can be prepared with a high fidelity, a first indicator for a compatibility with fault-tolerantquantum computing. The preparation of a 64-qubit Greenberger-Horne-Zeilinger (GHZ) state withabout 700 gates yields a 99.9% fidelity in a closed system while achieving a speedup of 35% viaparallelization.

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confidence: 99%

Ab-initio tree-tensor-network digital twin for quantum computer benchmarking in 2D

Jaschke,

Pagano,

Weber

et al. 2024

Quantum Sci. Technol.

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“…This superposition state leads to a very large concurrence in the dipole blockade regime [2]. Moreover, the cooperative behavior induced by the dipole-dipole interaction will result in many extraordinary phenomena, such as entangled atoms [3][4][5][6][7], enhanced Kerr nonlinearity [8][9][10], superradiance behavior [11][12][13], single photon sources via the four wave mixing process [14][15][16], blockade gate operation [17][18][19], collective encoding [20], more complex quantum states of light and so on [21][22][23][24].…”

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confidence: 99%

Dipole blockade without dipole-dipole interaction

Zhu¹,

Li²,

Yang³

et al. 2021

Preprint

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The dipole blockade phenomenon is a direct consequence of strong dipole-dipole interaction, where only single atom can be excited because the doubly excited state is shifted out of resonance. The corresponding two-body entanglement with non-zero concurrence induced by the dipole blockade effect is an important resource for quantum information processing. Here, we propose a novel physical mechanism for realizing dipole blockade without the dipole-dipole interaction, where two qubits coupled to a cavity, are driven by a coherent field. By suitably chosen placements of the qubits in the cavity and by adjusting the relative decay strengths of the qubits and cavity field, we kill many unwanted excitation pathways. This leads to dipole blockade. In addition, we show that these two qubits are strongly entangled over a broad regime of the system parameters. We show that a strong signature of this dipole blockade is the bunching property of the cavity photons which thus provides a possible measurement of the dipole blockade. We present dynamical features of the dipole blockade without dipole-dipole interaction. The proposal presented in this work can be realized not only in traditional cavity QED, but also in non-cavity topological photonics involving edge modes.

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“…Rabi oscillation, which is a cyclic rotation between coherently-coupled two atomic levels driven by an optical field, is one of the most fundamental building block in atomic physics, and has been used for numerious technologies such as atomic clocks [1], sensors [2], quantum communication [3] and computing [4,5]. In a photonic system, the coherent two-level system is implemented by two distinct photonic frequencies coupled by nonlinear optical interaction with a pump light.…”

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confidence: 99%

A cavity-enhanced broadband photonic Rabi oscillation

Ikuta,

Kobayashi,

Yamazaki

et al. 2020

Preprint

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Author Correction: High-fidelity entanglement and detection of alkaline-earth Rydberg atoms

Cited by 4 publications

References 0 publications

Ab-initio tree-tensor-network digital twin for quantum computer benchmarking in 2D

Ab-initio tree-tensor-network digital twin for quantum computer benchmarking in 2D

Dipole blockade without dipole-dipole interaction

A cavity-enhanced broadband photonic Rabi oscillation

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