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High-efficiency realization of the super-robust Rydberg Deutsch gate

A. Li
(
- Zhengzhou U.
)
,
B.-B. Liu
(
- Zhengzhou U.
)
,
L.-L. Yan
(
- Zhengzhou U. and
- Henan Normal U.
)
,
S.-L. Su
(
- Zhengzhou U. and
- Henan Normal U.
)
,
Gang Chen
(
- Zhengzhou U.
)

Jun 3, 2024

13 pages

Published in:

Phys.Rev.Res. 6 (2024) 2, 023231

Published: Jun 3, 2024

DOI:

10.1103/PhysRevResearch.6.023231 (publication)

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Abstract: (APS)

Quantum logic gates are the essential components of quantum computation and have broad practical applications, especially for the multiple-qubit logic gates. Compared with appliying a series of single- and two-qubit gates, constrcuting quantum computation with multiple-qubit logic gates can be more efficient and high-fidelity. As a three-qubit logic gate, Deutsch gate enables the realization of any feasible quantum computations. Based on neutral atoms, we present a scheme of super-robust Deutsch gate via optimal control technique. Utilizing the Rydberg blockade effect of neutral atoms, we design an implementable

D (β)

based on the three-step program. One of the notable advantages of this function is that

β

can be achieved arbitrarily between 0 and

π

with the operation of target atom. In addition, we give an analytical solution agreed very well with numerical simulations for the residual blocking effect between next-neighbor atoms that affects the performance quality of Deutsch gate. The fidelity of our proposed scheme is demonstrated by numerical simulation of the master equation based on the full Hamiltonian, and the robustness of our scheme with control errors is also illustrated. Our proposal offers an alternative promising scheme for fault-tolerant quantum computation.

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