论文标题
存储在Bose-Einstein冷凝水中存储短量脉冲的短单光级光脉冲
Storing short single-photon-level optical pulses in Bose-Einstein condensates for high-performance quantum memory
论文作者
论文摘要
大规模量子网络需要量子记忆，并具有长寿命的非古典光存储以及高效，高速和可靠的操作。由于物质平台的固有局限性和轻度 - 摩擦交互协议，这些功能的同时实现这些特征是具有挑战性的。在这里，我们提出了一种基于Bose-Einstein Condense（BEC）平台上的Autler-Townes-Splitting（ATS）量子记忆协议的实施，以克服这一障碍。我们通过将单光子级光的短脉冲作为rubidium bec中的集体自旋兴奋，证明了这种方法的原理证明。对于20 ns长脉冲，我们实现了超低噪声记忆，效率为30％，寿命为15 $μ$ s。 ATS协议的非绝热特征（导致高速和低噪声操作）结合了BEC平台的内在较大的原子密度和超低温度（提供高效且长寿的存储）为高表现量子记忆带来了新的途径。
Large-scale quantum networks require quantum memories featuring long-lived storage of non-classical light together with efficient, high-speed and reliable operation. The concurrent realization of these features is challenging due to inherent limitations of matter platforms and light-matter interaction protocols. Here, we propose an approach to overcome this obstacle, based on the implementation of the Autler-Townes-splitting (ATS) quantum-memory protocol on a Bose-Einstein condensate (BEC) platform. We demonstrate a proof-of-principle of this approach by storing short pulses of single-photon-level light as a collective spin-excitation in a rubidium BEC. For 20 ns long-pulses, we achieve an ultra-low-noise memory with an efficiency of 30% and lifetime of 15 $μ$s. The non-adiabatic character of the ATS protocol (leading to high-speed and low-noise operation) in combination with the intrinsically large atomic densities and ultra-low temperatures of the BEC platform (offering highly efficient and long-lived storage) opens up a new avenue towards high-performance quantum memories.
