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理论物理通讯：英文版

Approximate Toffoli Gate Originated from a Single Resonant Interaction of Cavity Dissipation and Atomic Spontaneous Emission

Chen, Chang-Yong

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

我们建议一个潜在地实际的计划在洞模式腐烂和原子自发的排放在被考虑的消散的洞证完由一个单个反响的相互作用实现一扇近似 three-qubit Toffoli 门。计划不要求控制的 two-qubit -- 不门但是使用一扇 three-qubit 阶段门和二扇 Hadamard 门，在近似阶段门能被仅仅和洞模式的原子的一个单个消散的反响的相互作用实现的地方。讨论为优点和我们的计划的试验性的可行性被做。

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This paper proposes a scheme for realization of a three-qubit Toffoli gate operation using three four-level atoms by a selective atom-field interaction in a cavity quantum electrodynamics system. In the proposed protocol, the quantum information is encoded on the stable ground states of atoms, and atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influence of the dissipation on fidelity and success probability of the three-qubit Toffoli gate is also discussed. The scheme can also be applied to realize an N -qubit Toffoli gate and the interaction time required does not rise with increasing the number of qubits.

Chinese Physics B•Jan 1, 2009•17 citations
我们建议一个潜在地实际的计划在洞模式腐烂和原子自发的排放在被考虑的消散的洞证完由一个单个反响的相互作用实现一扇近似 three-qubit Toffoli 门。计划不要求控制的 two-qubit -- 不门但是使用一扇 three-qubit 阶段门和二扇 Hadamard 门，在近似阶段门能被仅仅和洞模式的原子的一个单个消散的反响的相互作用实现的地方。讨论为优点和我们的计划的试验性的可行性被做。
We propose a potentially practical scheme to implement an approximate three-qubit Toffoli gate by a single resonant interaction in dissipative cavity QED in which the cavity mode decay and atomic spontaneous emission are considered. The scheme does not require two-qubit controlled-NOT gates but uses a three-qubit phase gate and two Hadamard gates, where the approximate phase gate can be implemented by only a single dissipative resonant interaction of atoms with the cavity mode. Discussions are made for the advantages and the experimental feasibility of our scheme.
This paper proposes a scheme for realization of a three-qubit Toffoli gate operation using three four-level atoms by a selective atom-field interaction in a cavity quantum electrodynamics system. In the proposed protocol, the quantum information is encoded on the stable ground states of atoms, and atomic spontaneous emission is negligible as the large atom-cavity detuning effectively suppresses the spontaneous decay of the atoms. The influence of the dissipation on fidelity and success probability of the three-qubit Toffoli gate is also discussed. The scheme can also be applied to realize an N -qubit Toffoli gate and the interaction time required does not rise with increasing the number of qubits.