存在单粒子损失时量子输运的粒子流、噪声与计数统计
Particle current, noise, and counting statistics of quantum transport in the presence of a single-particle loss
AI总结：
本文研究单粒子损失对介观量子输运的影响，通过分析量子点接触和量子点系统得到粒子流累积量生成函数，并证明电流噪声包含与粒子损失率成正比的可测量分量。
摘要：
耗散如何影响输运是量子科学中的一个重要主题。本文从理论上研究了介观输运中单粒子损失的影响，这一问题在超冷原子气体实验中一直备受关注。通过明确分析量子点接触和量子点系统，我们得到了粒子流的累积量生成函数，其形式表达式在两个系统中是共同的。基于该生成函数，我们以自由费米子为例，展示了在传导通道中引入损失后平均电流、粒子损失率以及噪声的行为。结果表明，电流噪声包含与粒子损失率成正比的分量，这一分量可能在实验中可测量。
英文摘要：
How dissipation affects transport is an important theme in quantum science. Here we theoretically investigate an impact of a single-particle loss in mesoscopic transport, which has been an issue in experiments of ultracold atomic gases. By explicitly analyzing quantum point contact and quantum dot systems, we obtain a cumulant generating function on the particle current whose formal expression turns out to be common to two systems. In terms of this generating function, behaviors of average current, particle loss rate, and noises in presences of losses introduced in conduction channels are exemplified for free fermions. It is shown that the current noise contains the component proportional to the particle loss rate, which may be measurable in experiments.
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。
