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arXiv 1407.0239quant-ph
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多腔全光量子逻辑的多光子共振

Multiphoton resonances for all-optical quantum logic with multiple cavities

Mark S. Everitt, Barry M. Garraway

摘要:

我们发展了一个多能级原子与多模腔相互作用产生腔增强多光子共振的理论。共振的位置预测从使用有效的两个和三个级别的哈密顿。作为一个应用,我们表明,量子门可以实现时,光子量子比特编码的腔模式的安排,其中辅助原子过境的腔。通过对原子的条件测量和使用选定的双轨希尔伯特空间,增加了操作的保真度。提出了一套通用的门,包括Fredkin门和iSWAP操作,该系统似乎有希望的可扩展性。

英文摘要:

We develop a theory for the interaction of multi-level atoms with multi-mode cavities yielding cavity-enhanced multi-photon resonances. The locations of the resonances are predicted from the use of effective two- and three-level Hamiltonians. As an application we show that quantum gates can be realised when photonic qubits are encoded on the cavity modes in arrangements where ancilla atoms transit the cavity. The fidelity of operations is increased by conditional measurements on the atom and by the use of a selected, dual-rail, Hilbert space. A universal set of gates is proposed, including the Fredkin gate and iSWAP operation; the system seems promising for scalability.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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