单原子单光子服务器
A Single-Photon Server with Just One Atom
摘要：
中性原子是量子信息确定性处理的理想对象。纠缠操作已经通过光子交换或受控碰撞来执行。原子-光子界面是由自由空间中的单个原子或强耦合到光学腔中的单个原子实现的。然而，中性原子的一个长期挑战是克服有限的观察时间。无一例外，量子效应只有在系综平均后才出现。在这里，我们报道了一个单光子源与一个和只有一个原子准永久耦合到一个高精细度腔。准永久性是指我们能够保持原子足够长的时间，首先，量化光子发射统计数据，其次，保证作为单光子服务器的后续性能，最多可提供30万个光子，最长可达30秒。这是通过单光子产生和原子冷却的独特组合实现的。我们的方案带来了真正确定性的量子信息科学协议，光和物质触手可及。
英文摘要：
Neutral atoms are ideal objects for the deterministic processing of quantum information. Entanglement operations have been performed by photon exchange or controlled collisions. Atom-photon interfaces were realized with single atoms in free space or strongly coupled to an optical cavity. A long standing challenge with neutral atoms, however, is to overcome the limited observation time. Without exception, quantum effects appeared only after ensemble averaging. Here we report on a single-photon source with one-and-only-one atom quasi permanently coupled to a high-finesse cavity. Quasi permanent refers to our ability to keep the atom long enough to, first, quantify the photon-emission statistics and, second, guarantee the subsequent performance as a single-photon server delivering up to 300,000 photons for up to 30 seconds. This is achieved by a unique combination of single-photon generation and atom cooling. Our scheme brings truly deterministic protocols of quantum information science with light and matter within reach.
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。
