Coherent ground-state transport of neutral atoms

Li, X. X.; You, Jia-Bin; Shao, Xiao‐Qiang; Li, Weibin

doi:10.1103/physreva.105.032417

Cited by 18 publications

(7 citation statements)

References 89 publications

(122 reference statements)

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“…Neutral-atom systems have become a promising platform for quantum computing and quantum simulation [40][41][42][43][44][45][46][47][48][49][50][51], due to their inherent long lifetime in electronic ground states and strong dispersive two-body interactions in Rydberg states. On other hand, experimental techniques have rapidly developed to arrange a large number of atoms in defect-free and programmable geometry in various dimensions while retaining individual addressability [52][53][54][55][56][57][58].…”

Section: Introductionmentioning

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: Introductionmentioning

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

“…Rydberg blockade was verified in the experiment by two groups, and they set two Rydberg atoms about 4 µm [49] and 10 µm [50] apart, respectively. Subsequently, Rydberg atom has been widely used in quantum information processing [51][52][53][54][55][56][57][58][59][60].…”

Section: Introductionmentioning

confidence: 99%

Fusing atomic W states with Rydberg superatom

Zhang¹,

Liu²,

Ji³

et al. 2022

Laser Phys. Lett.

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Quantum entanglement is the basic resource of quantum information processing and quantum computation, especially multi-partite entanglement. The simple and efficient generation of multi-partite entanglement has always been one of the hot topics of scholars. In this paper, we propose a qubit-loss-free fusion scheme for generation of large-scale entangled W states with Rydberg superatom. By sending two superatoms belonging to a k-atom W states and a l-atom W states, respectively, into a cavity, we may obtain a (k + l)-atom W states via detecting the cavity state after interaction. The numerical simulation analysis shows that the fidelity is robust against both spontaneous emission of superatoms and decay of the cavity. In addition, the feasibility analysis indicates this scheme can also be realized in experiment.

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“…Our model can also be generalized to other non-Abelian symmetry, and to the large classes of QMBS Hamiltonian that resort to the annihilating term H A . The proposal to invert QMBS in this work may also stimulate more experimental activities to realize setups that weakly violate the quantum ergodicity or the MBL [42,[69][70][71].…”

mentioning

confidence: 96%

“…We adopt H sym as the S = 1/2 XX Heisenberg chain that is potentially realizable in Rydberg quantum simulators [42,[69][70][71]]…”

mentioning

confidence: 99%

Inverting multiple quantum many-body scars via disorder

Chen¹,

Zhu²

2023

Preprint

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The recent observations of persistent revivals in the Rydberg atom chain have revealed a weak ergodicity breaking mechanism known as quantum many-body scars, which is typically a collection of states with low entanglement embedded in otherwise thermal spectra. Here, by applying a generic formalism, we propose a direct evolution from the quantum many-body scars to their inverse case and construct multiple inverted quantum many-body scars, i.e., different sets of excited states with volume-law entanglement embedded in a sea of the many-body localized spectrum. When increasing the disorder strength, a tower of exact eigenstates remain intact, acting as conventional quantum many-body scars at weak disorder, and each residing inside narrow energy windows with the emerged inverted quantum many-body scar at strong disorder. Moreover, the strong disorder also induces additional sets of inverted quantum many-body scars with their energies concentrating in the middle of the exact eigenstates. As a result, all the multiple inverted quantum many-body scars are approximately equidistant in energy. We further examine the stability of the conventional and the inverted quantum many-body scars against the external random field. Our findings expand the variety of nonthermal systems and connect the weak ergodicity breaking with the weak violation of many-body localization.

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Coherent ground-state transport of neutral atoms

Cited by 18 publications

References 89 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

Fusing atomic W states with Rydberg superatom

Inverting multiple quantum many-body scars via disorder

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