Implementation of universal two- and three-qubit quantum gates in a cavity QED

Chouikh, A.; Саид, Т.; Essammouni, K.; Беннаи, М.

doi:10.1007/s11082-016-0717-5

Cited by 7 publications

(1 citation statement)

References 28 publications

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“…A three-qubit gate can be directly used in the construction of a quantum computing network [27], the quantum-error-correction protocols [28], and quantum algorithms [2]. Many efforts have been devoted to the achievement of multi-qubit gates and the implementation of Grover's search algorithm theoretically by using superconducting qubits [29][30][31][32][33][34][35][36][37][38][39][40], Rydberg atoms [41,42], polar molecules [43,44], ion traps [45,46] and nuclear magnetic resonance [47,48].…”

Section: Introductionmentioning

confidence: 99%

Simple scheme for implementing the Grover search algorithm with superconducting qubits

Sakhouf

Daoud

Laamara

2021

J. Phys. B: At. Mol. Opt. Phys.

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This work concerns a three-qubit processor implemented as three transmon-type superconducting qubits capacitively coupled to a superconducting resonator driven by a microwave field. Based on an effective Hamiltonian of this system, we propose a scheme to realize an X-rotation gate for three qubits requiring only a single-step operation. During the gate operation, the cavity photon-number is canceled due to the strong microwave field. It does not require the cavity to be initially in the vacuum state and the scheme is insensitive to cavity decay. We also present an effective scheme to implement Grover's search algorithm based on this quantum gate and a phase oracle. Using numerical simulation and analysis, we show that the proposed schemes allow for efficiently finding the target state with a high fidelity. The potential application of these proposals with current QED circuit technology is also discussed.

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Section: Introductionmentioning

confidence: 99%

Simple scheme for implementing the Grover search algorithm with superconducting qubits

Sakhouf

Daoud

Laamara

2021

J. Phys. B: At. Mol. Opt. Phys.

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Remote Implementation of a Fredkin Gate via Virtual Excitation of an Atom‐Cavity‐Fiber System

Guang-qing

Niu

et al. 2019

Annalen der Physik

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Simple operations and robust results are always of interest for any quantum tasks. Herein, a novel scheme is proposed for implementing a Fredkin gate via the virtual excitation of an atom‐cavity‐fiber system. The scheme is to control the nonlocal state‐swap of two spatially separated target atoms according to the state of the control atom at hand. In the scheme, only the control atom at hand needs the laser to drive and the virtual excitation of the atom‐cavity‐fiber system effectively suppresses the decoherence. By numerical simulations, appreciated parameters are chosen and it is shown that the Fredkin gate can be implemented with high fidelity. Although the operation time error has slightly stronger influence on the fidelity than atom‐cavity coupling strength error, the robustness of the scheme can be effectively improved against the operation time error by adopting Gaussian pulse to replace the constant pulse. In addition, the scheme can be generalized to implement alternative Fredkin gates by controlling the non‐local state‐swap of two remote atoms or of two remote and spatially separated atoms, which will be undoubtedly of benefit to the distributed quantum computation and remote quantum information processing.

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