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arXiv 2205.12866quant-ph
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使用绝热 Rydberg dressing 的中性原子纠缠

Neutral atom entanglement using adiabatic Rydberg dressing

Anupam Mitra, Sivaprasad Omanakuttan, Michael J. Martin, Grant W. Biedermann, Ivan H. Deutsch

AI总结:

本文研究了利用绝热 Rydberg dressing 和双光子跃迁实现中性原子 Mølmer-Sørensen 纠缠门,证明其在非完美 Rydberg blockade 区间内可实现快速高保真门。

摘要:

我们重新研究了使用中性原子的绝热 Rydberg dressing 范式实现双量子比特纠缠门(即 Mølmer-Sørensen 门),如 [Phys. Rev. A 101, 030301 (R) (2020)] 中所研究的。我们研究了使用双光子跃迁实现快速绝热通道,这不需要使用紫外激光,并且只需对一个场进行幅度调制并固定所有激光频率即可实现。我们发现,使用双光子激发可以实现与单光子激发相当的纠缠门保真度。此外,我们探讨了如何利用绝热 dressing 协议在非完美 Rydberg blockade 区间内实现纠缠门。我们表明,使用绝热 dressing,我们可以实现由 Rydberg 相互作用产生的纠缠的基本极限所设定的门保真度缩放,同时在双激发 Rydberg 态中保持有限布居数。这使得对于相距超过 blockade 半径的原子,能够实现快速高保真门。

英文摘要:

We revisit the implementation of a two-qubit entangling gate, the Mølmer-Sørensen gate, using the adiabatic Rydberg dressing paradigm for neutral atoms as studied in [Phys. Rev. A 101, 030301 (R) (2020)]. We study the implementation of rapid adiabatic passage using a two-photon transition, which does not require the use of an ultra-violet laser, and can be implemented using only amplitude modulation of one field with all laser frequencies fixed. We find that entangling gate fidelities, comparable to the one-photon excitation, are achievable with the two-photon excitation. Moreover, we address how the adiabatic dressing protocol can be used to implement entangling gates outside the regime of a perfect Rydberg blockade. We show that using adiabatic dressing we can achieve scaling of gate fidelity set by the fundamental limits to entanglement generated by the Rydberg interactions while simultaneously retaining a limited population in the doubly-excited Rydberg state. This allows for fast high fidelity gates for atoms separated beyond the blockade radius.

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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