Lenz Samuel, König Dennis, Hunger David, van Slageren Joris
Institute of Physical Chemistry and Center for Integrated Quantum Science and Technology, University of Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany.
Adv Mater. 2021 Jul;33(30):e2101673. doi: 10.1002/adma.202101673. Epub 2021 Jun 9.
Whilst quantum computing has recently taken great leaps ahead, the development of quantum memories has decidedly lagged behind. Quantum memories are essential devices in the quantum technology palette and are needed for intermediate storage of quantum bit states and as quantum repeaters in long-distance quantum communication. Current quantum memories operate at cryogenic, mostly sub-Kelvin temperatures and require extensive and costly peripheral hardware. It is demonstrated that ensembles of weakly coupled molecular spins show long coherence times and can be used to store microwave pulses of arbitrary phase. These studies exploit strong coupling of the spin ensemble to special 3D microwave resonators. Most importantly, these systems operate at room temperature.
虽然量子计算最近取得了巨大进展，但量子存储器的发展却明显滞后。量子存储器是量子技术领域的关键器件，用于量子比特状态的中间存储以及长距离量子通信中的量子中继器。目前的量子存储器在低温下运行，大多处于亚开尔文温度，并且需要大量昂贵的外围硬件。研究表明，弱耦合分子自旋系综具有较长的相干时间，可用于存储任意相位的微波脉冲。这些研究利用了自旋系综与特殊三维微波谐振器的强耦合。最重要的是，这些系统在室温下运行。
