迈向声学频率氮化硅膜的无腔基态冷却

Towards cavity-free ground-state cooling of an acoustic-frequency silicon nitride membrane.

作者信息

Pluchar Christian M, Agrawal Aman R, Schenk Edward, Wilson Dalziel J

出版信息

Appl Opt. 2020 Aug 1;59(22):G107-G111. doi: 10.1364/AO.394388.

Abstract

We demonstrate feedback cooling of a millimeter-scale, 40 kHz SiN membrane from room temperature to 5 mK (3000 phonons) using a Michelson interferometer, and discuss the challenges to ground-state cooling without an optical cavity. This advance appears within reach of current membrane technology, positioning it as a compelling alternative to levitated systems for quantum sensing and fundamental weak force measurements.

摘要

我们展示了使用迈克尔逊干涉仪将毫米级、40千赫兹的氮化硅膜从室温冷却至5毫开尔文（3000个声子）的反馈冷却，并讨论了在没有光学腔的情况下实现基态冷却所面临的挑战。这一进展似乎在当前的膜技术范围内可以实现，使其成为用于量子传感和基本弱力测量的悬浮系统的一个有吸引力的替代方案。