Extremely low-loss acoustic phonons in a quartz bulk acoustic wave resonator at millikelvin temperature
Extremely low-loss acoustic phonons in a quartz bulk acoustic wave resonator at millikelvin temperature
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DOI：
10.1063/1.4729292
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发表时间：
2012-06-11
影响因子：
4
通讯作者：
Tobar, Michael E.
中科院分区：
文献类型：
--
作者：
Goryachev, Maxim;Creedon, Daniel L.;Tobar, Michael E.
低损耗，高频声谐振器冷却到毫开尔文温度是一个非常感兴趣的主题应用到混合量子系统。当冷却到20 mK，我们表明，在体声波石英谐振器的谐振声学声子模式表现出非常低的损耗（与Q因子的顺序数十亿）在15.6和65.4 MHz的频率，最大f。7.8 x 10（16）Hz的Q积。鉴于这一结果，我们表明，在量子基态附近的这种设备的Q因子可以比以前达到的四个数量级。这种谐振器具有对电磁冷却到声子基态至关重要的低损耗，以及几秒钟的长相干和相互作用时间的可能性，允许多个量子门操作。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.4729292]
Low-loss, high frequency acoustic resonators cooled to millikelvin temperatures are a topic of great interest for application to hybrid quantum systems. When cooled to 20 mK, we show that resonant acoustic phonon modes in a bulk acoustic wave quartz resonator demonstrate exceptionally low loss (with Q-factors of order billions) at frequencies of 15.6 and 65.4 MHz, with a maximum f . Q product of 7.8 x 10(16) Hz. Given this result, we show that the Q-factor in such devices near the quantum ground state can be four orders of magnitude better than previously attained. Such resonators possess the low losses crucial for electromagnetic cooling to the phonon ground state, and the possibility of long coherence and interaction times of a few seconds, allowing multiple quantum gate operations. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4729292]