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arXiv 1607.05977quant-ph
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一种固态单光子滤波器

A solid-state single-photon filter

L. de Santis, C. Antón, B. Reznychenko, N. Somaschi, G. Coppola, J. Senellart, C. Gómez, A. Lemaître, I. Sagnes, A. G. White, L. Lanco, A. Auffeves, P. Senellart

摘要:

线性光学量子计算的一个强限制是基于不可区分光子的聚结的双量子比特门的概率操作。确定性操作的一个途径是利用原子跃迁的单光子非线性。通过原子-光子相互作用的工程化,已经用自然原子实现了相移器、光子滤波器和光子-光子门。已经报道了半导体量子点的概念证明,但受限于低效的原子-光子界面和退相。在这里,我们报告了一个高效的单光子滤波器的基础上,在单光子水平上的一个大的光学非线性,在一个接近最佳的量子点腔接口。当用相干光波包探测时,该器件在$0.3 \pm 0.1$入射光子周围显示出创纪录的非线性阈值。我们证明了直接反射脉冲由80%的单光子Fock态组成,并且与单光子相比,双光子和三光子分量被强烈抑制。

英文摘要:

A strong limitation of linear optical quantum computing is the probabilistic operation of two-quantum bit gates based on the coalescence of indistinguishable photons. A route to deterministic operation is to exploit the single-photon nonlinearity of an atomic transition. Through engineering of the atom-photon interaction, phase shifters, photon filters and photon- photon gates have been demonstrated with natural atoms. Proofs of concept have been reported with semiconductor quantum dots, yet limited by inefficient atom-photon interfaces and dephasing. Here we report on a highly efficient single-photon filter based on a large optical non-linearity at the single photon level, in a near-optimal quantum-dot cavity interface. When probed with coherent light wavepackets, the device shows a record nonlinearity threshold around $0.3 \pm 0.1$ incident photons. We demonstrate that directly reflected pulses consist of 80% single-photon Fock state and that the two- and three-photon components are strongly suppressed compared to the single-photon one.

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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