Robust generation of entangled state via ground-state antiblockade of Rydberg atoms

Zhao, Yuanyuan; Liu, B.; Ji, Yuqiao; Tang, Shi-Qing; Shao, Xiao‐Qiang

doi:10.1038/s41598-017-16533-9

Cited by 18 publications

(18 citation statements)

References 41 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the second set of data, we consider an initial state where the qubits are in an entangled state. The qubits form Rydberg atom pairs under the condition of Rydberg blockades [50][51][52][53][54] which implies that both the qubits cannot be simultaneously excited to Rydberg states. This is done by first preparing both the qubits in |00 state.…”

Section: Resultsmentioning

confidence: 99%

Application of quantum scrambling in Rydberg atom on IBM quantum computer

Aggarwal¹,

Raj²,

Behera³

et al. 2018

Preprint

View full text Add to dashboard Cite

Quantum scrambling measured by out-of-time-ordered correlator (OTOC) has an important role in understanding the physics of black holes and evaluating quantum chaos. It is known that Rydberg atom has been a general interest due to its extremely favourable properties for building a quantum simulator. Fast and efficient quantum simulators can be developed by studying quantum scrambling in related systems. Here we present a general quantum circuit to theoretically implement an interferometric protocol which is a technique proposed to measure OTOC functions. We apply this circuit to measure OTOC and hence the quantum scrambling in a simulation of a 1-D Ising spin model for Rydberg atom. We apply this method to both initial product and entangled states to compare the scrambling of quantum information in both cases. Finally we discuss other constructions where this technique can

show abstract

Section: Resultsmentioning

confidence: 99%

Application of quantum scrambling in Rydberg atom on IBM quantum computer

Aggarwal¹,

Raj²,

Behera³

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…Ω 2 1p /4∆ 1 |1 1 1|, Ω2 m cos 2 ωt/4∆ 1 |r 1 r|, Ω 2 2p /4∆ 2 |1 2 1|, and Ω 2 2r /4∆ 2 |r 2 r|. These unwanted energy shifts can be eliminated through some manners, such as auxiliary fields [65], detuning compensations [66], and phase corrections [67].…”

Section: Discussionmentioning

confidence: 99%

Resilient quantum gates on periodically driven Rydberg atoms

Wu,

Wang,

Han

et al. 2021

Preprint

View full text Add to dashboard Cite

Fault-tolerant implementation of quantum gates is one of preconditions for realizing quantum computation. The platform of Rydberg atoms is one of the most promising candidates for achieving quantum computation. We propose to implement a controlled-Z gate on Rydberg atoms where an amplitude-modulated field is employed to induce Rydberg antiblockade. Gate robustness against the fluctuations in the Rydberg-Rydberg interaction can be largely enhanced by adjusting amplitudemodulated field. Furthermore, we introduce a Landau-Zener-Stückelberg transition on the target atom so as to improve the gate resilience to the deviation in the gate time and the drift in the pulse amplitude. With feasible experimental parameters, one can achieve the gate with low fidelity errors caused by atomic decay, interatomic dipole-dipole force, and Doppler effects. Finally, we generalize the gate scheme into multiqubit cases, where resilient multiqubit phase gates can be obtained in one step with an unchanged gate time as the number of qubits increases.

show abstract

“…[15,16] and experimentally verified by Weidemüller group in 87 Rb atoms [17], occurs when the interaction induced energetic shift can be well compensated by the laser detuning to the Rydberg level, triggering many interesting applications then. For instance it enables the implementation of an accurate one-step quantum logic gate [18] or a maximal entanglement [19,20], facilitating excitation dynamics even in thermal atoms beyond the frozen limit [21][22][23] or in anisotropic interacting systems due to partial resonance [24]. Besides, some nontrivial facilitation approaches, such as relying on inhomogeneous broadening on blue-detuned atoms with attractive interactions [25], avoided crossings between collective manybody states [26,27], or seeded avalanche dynamics in offresonant Rydberg atoms [28], have been proposed, providing more prospects for observing strongly correlated excitation growth in ultracold Rydberg gases [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Deterministic facilitated excitation of the weakly driven atom in heteronuclear Rydberg atom pairs beyond antiblockade

Wang

et al. 2019

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

Due to the intrinsic strong blockaded interaction shifting the energy level of Rydberg state, the steady Rydberg probability may be substantially restrained to a low level, especially for atoms suffering from weak drivings. We report an exotic excitation facilitation using strong blockaded energy shifting the double excitation state, leading to the weakly-driven atom deterministically excited by a significantly improved fraction even at far off-resonant regimes. This phenomenon is attributed to the effective induction of a reduced detuning to the weakly-driven atom by optimizing parameters of an auxiliary strongly-driven atom, arising a modified large probability preserved for a broadening range of detunings. The influence from breaking blockade condition on the excitation probability is also discussed. In contrast to previous approaches, our excitation facilitation mechanism does not rely on antiblockade effect to the compensation of Rydberg energy, serving as a fresh way to a deterministic single-atom excitation of the target atom in a pair of heteronuclear Rydberg atoms, where a strong interatomic interaction is required.

show abstract

Robust generation of entangled state via ground-state antiblockade of Rydberg atoms

Cited by 18 publications

References 41 publications

Application of quantum scrambling in Rydberg atom on IBM quantum computer

Application of quantum scrambling in Rydberg atom on IBM quantum computer

Resilient quantum gates on periodically driven Rydberg atoms

Deterministic facilitated excitation of the weakly driven atom in heteronuclear Rydberg atom pairs beyond antiblockade

Contact Info

Product

Resources

About