Gaussian soft control-based quantum fan-out gate in ground-state manifolds of neutral atoms

Yin, Hongda; Shao, Xiao‐Qiang

doi:10.1364/ol.424469

Cited by 19 publications

(12 citation statements)

References 32 publications

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“…Alternatively, the robustness of the scheme may be improved by substituting rectangular pulses with Gaussian pulses without changing the number of cycles. This temporal modulation significantly suppresses the non-resonant contribution of the interaction while remaining insensitive to the operation time [104,105]. Now we change the time-independent Rabi frequency Ω 2 into a time-dependent Gaussian form…”

Section: B Effects Of Distance Fluctuations and Timing Errorsmentioning

confidence: 99%

High-fidelity interconversion between Greenberger-Horne-Zeilinger and $W$ states through Floquet-Lindblad engineering in Rydberg atom arrays

Shao¹,

Liu²,

Xue³

et al. 2023

Preprint

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Greenberger-Horne-Zeilinger and W states feature genuine tripartite entanglement that cannot be converted into each other by local operations and classical communication. Here, we present a dissipative protocol for deterministic interconversion between the Greenberger-Horne-Zeilinger and the W states of three neutral 87 Rb atoms arranged in an equilateral triangle of a two-dimensional array. With three atomic levels and diagonal van der Waals interactions of Rydberg atoms, the interconversion between tripartite entangled states can be efficiently accomplished in the Floquet-Lindblad framework through the periodic optical pump and dissipation engineering. We evaluate the feasibility of the existing methodology using the experimental parameters accessible to current neutral-atom platforms. We find that our scheme is robust against typical noises, such as laser phase noise and geometric imperfection of the atom array. In addition, our scheme can integrate the Gaussian soft quantum control technique, which further reduces the overall conversion time and increases the resilience to timing errors and interatomic distance fluctuations. The high-fidelity and robust tripartite entanglement interconversion protocol provides a route to save physical resources and enhance the computational efficiency of quantum networks formed by neutral-atom arrays.

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Section: B Effects Of Distance Fluctuations and Timing Errorsmentioning

confidence: 99%

High-fidelity interconversion between Greenberger-Horne-Zeilinger and $W$ states through Floquet-Lindblad engineering in Rydberg atom arrays

Shao¹,

Liu²,

Xue³

et al. 2023

Preprint

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show abstract

“…Soft quantum control, with a field starting from and ending at zero or teeny amplitudes, is an effective method for improving fidelity of manipulating quantum states and appeasing intense highly‐frequent oscillations caused by an imperfect RWA condition. [ 71,120,121 ] To this end, we set a shaped Ω 0 with a time‐dependent envelope

\Omega _0=\Omega _{\rm m}\sin ^2({\pi t}/T)

and the gate time

T=4\pi /\Omega _{\rm m}

.…”

Section: Performance Of the Three‐qubit Phase Gatementioning

confidence: 99%

Fast and Robust Multiqubit Gates on Rydberg Atoms by Periodic Pulse Engineering

Wang

Han

et al. 2022

Adv Quantum Tech

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The idea of periodic pulse engineering (PPE) is exploited to achieve unconventional Rydberg pumping for a robust multiqubit gate on Rydberg atoms trapped in a 2D array. By designing component parameters in PPE, fast regimes of full and partial Rydberg antiblockade (RAB) among three atoms are explored. Furthermore, through assigning appropriate components in PPE a phenomenon of RAB-based blockade emerges and then a three-qubit gate can be achieved. It is identified that two kinds of Rydberg-Rydberg interaction (RRI), van der Waals interaction and dipole-dipole Förster resonance interaction, are both applicative for implementing the proposed scheme. Different from recent schemes of Rydberg atom multiqubit gates, the operated atoms are indistinguishable with respect to the laser field of PPE, and the present one-step scheme is essentially fast owing to the first-order dynamics where the dominant component in PPE is not degraded. In addition, the proposed multiqubit gate is robust against atomic decay and deviation of RRI strengths, because the excitation duration of atoms is short, with the total excitation number ≤ 1. This work may facilitate experimental demonstration of RAB-based gates of strongly coupled atoms.

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“…These issues are common and intractable in almost all of existing RAB-based gate schemes [30][31][32][33][34][35], greatly limiting the experimental implementation of high-fidelity RAB-based gates. In order to solve these issues of RAB-based gates, reducing the participation of |rr in the gate procedure can be an effective approach [53,[71][72][73][74]. Here we change the RAB condition for the effective Hamiltonian Eq.…”

Section: Dynamical Swap Gate With a Modified Rab Conditionmentioning

confidence: 99%

Unselective ground-state blockade of Rydberg atoms for implementing quantum gates

Wu,

Wang,

Han

et al. 2021

Preprint

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A dynamics regime of Rydberg atoms, unselective ground-state blockade (UGSB), is proposed in the context of Rydberg antiblockade (RAB), where the evolution of two atoms is suppressed when they populate in an identical ground state. UGSB is used to implement a SWAP gate in one step without individual addressing of atoms. Aiming at circumventing common issues in RABbased gates including atomic decay, Doppler dephasing, and fluctuations in the interatomic coupling strength, we modify the RAB condition to achieve a dynamical SWAP gate whose robustness is much greater than that of the nonadiabatic holonomic one in the conventional RAB regime. In addition, on the basis of the proposed SWAP gates, we further investigate the implementation of a threeatom Fredkin gate by combining Rydberg blockade and RAB. The present work may facilitate to implement the RAB-based gates of strongly coupled atoms in experiment.

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Gaussian soft control-based quantum fan-out gate in ground-state manifolds of neutral atoms

Cited by 19 publications

References 32 publications

High-fidelity interconversion between Greenberger-Horne-Zeilinger and $W$ states through Floquet-Lindblad engineering in Rydberg atom arrays

High-fidelity interconversion between Greenberger-Horne-Zeilinger and $W$ states through Floquet-Lindblad engineering in Rydberg atom arrays

Fast and Robust Multiqubit Gates on Rydberg Atoms by Periodic Pulse Engineering

Unselective ground-state blockade of Rydberg atoms for implementing quantum gates

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