Time-Optimal Two- and Three-Qubit Gates for Rydberg Atoms

Jandura, Sven; Pupillo, Guido

doi:10.48550/arxiv.2202.00903

Cited by 4 publications

(4 citation statements)

References 69 publications

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“…During the completion of our work, we became aware of related work demonstrating time-optimal two-qubit gates with Rydberg atoms [51]. Note that the gate times are comparable to the protocols presented here.…”

Section: Discussionmentioning

confidence: 78%

Error-budgeting for a controlled-phase gate with strontium-88 Rydberg atoms

Pagano,

Weber,

Jaschke

et al. 2022

Preprint

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We study the implementation of a high fidelity controlled-phase gate in a Rydberg quantum computer. The protocol is based on a symmetric gate with respect to the two qubits as experimentally realized by Levine et al [Phys. Rev. Lett. 123, 170503 (2019)], but allows for arbitrary pulse shapes with time-dependent detuning. Optimizing the pulse shapes, we introduce laser pulses which shorten the time spent in the Rydberg state by 10% and reduce the leading contribution to the gate infidelity, i.e., the decay from the Rydberg state. Remarkably, this reduction can be achieved for smooth pulses in detuning and smooth turning on of the Rabi frequency as required in any experimental realization. We carefully analyze the influence of fundamental error sources such as the photon recoil, the microscopic interaction potential, as well as the harmonic trapping of the atoms for an experimentally realistic setup based on strontium-88 atoms. We find that an average gate fidelity above 99.9% is possible for a very conservative estimation of experimental parameters.

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Section: Discussionmentioning

confidence: 78%

Error-budgeting for a controlled-phase gate with strontium-88 Rydberg atoms

Pagano,

Weber,

Jaschke

et al. 2022

Preprint

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show abstract

“…The accurate preparation of nonclassical states of trapped Rydberg atoms relevant in quantum sensing has also been suggested using Bayesian optimization techniques [425]. Single and entangling gates for Rydberg quantum computing have been optimized for enhanced robustness with respect to parameter fluctuations and decoherence [250,267,302,447,456].…”

Section: Trapped Atoms Ions and Moleculesmentioning

confidence: 99%

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Koch,

Boscain,

Calarco

et al. 2022

Preprint

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Quantum optimal control, a toolbox for devising and implementing the shapes of external fields that accomplish given tasks in the operation of a quantum device in the best way possible, has evolved into one of the cornerstones for enabling quantum technologies. The last few years have seen a rapid evolution and expansion of the field. We review here recent progress in our understanding of the controllability of open quantum systems and in the development and application of quantum control techniques to quantum technologies. We also address key challenges and sketch a roadmap for future developments.

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“…This sets a mininum clock speed 1/T for the quantum processor that may be increased by allowing for larger holonomic errors. More generally, we expect that both the gate fidelity as well as the clock speed can be further increased using optimal control methods, where other error sources can be taken into account [80].…”

mentioning

confidence: 99%

Hardware efficient quantum simulation of non-abelian gauge theories with qudits on Rydberg platforms

González-Cuadra¹,

Zache²,

Carrasco³

et al. 2022

Preprint

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Non-abelian gauge theories underlie our understanding of fundamental forces in nature, and developing tailored quantum hardware and algorithms to simulate them is an outstanding challenge in the rapidly evolving field of quantum simulation. Here we take an approach where gauge fields, discretized in spacetime, are represented by qudits and are time-evolved in Trotter steps with multiqudit quantum gates. This maps naturally and hardware-efficiently to an architecture based on Rydberg tweezer arrays, where long-lived internal atomic states represent qudits, and the required quantum gates are performed as error-tolerant holonomic operations supported by a Rydberg blockade mechanism. We illustrate our proposal for a minimal digitization of SU(2) gauge fields.

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Time-Optimal Two- and Three-Qubit Gates for Rydberg Atoms

Cited by 4 publications

References 69 publications

Error-budgeting for a controlled-phase gate with strontium-88 Rydberg atoms

Error-budgeting for a controlled-phase gate with strontium-88 Rydberg atoms

Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Hardware efficient quantum simulation of non-abelian gauge theories with qudits on Rydberg platforms

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