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arXiv 1202.4556physics.ins-detquant-ph
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毫开尔文温度下石英体声波谐振器中的极低损耗声学声子

Extremely Low-Loss Acoustic Phonons in a Quartz Bulk Acoustic Wave Resonator at Millikelvin Temperature

Maxim Goryachev, Daniel L. Creedon, Eugene N. Ivanov, Serge Galliou, Roger Bourquin, Michael E. Tobar

摘要:

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时,我们表明,体声波(BAW)石英谐振器中的共振声学声子模式表现出非常低的损耗($Q$-数十亿的因素)在15.6和65.4 MHz的频率,最大$f.Q$产品为7.8 $\times10^{16}$ Hz。鉴于这一结果,我们表明,$Q$因子在这样的设备附近的量子基态可以是四个数量级比以前达到的。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。

英文摘要:

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 (BAW) 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$\times10^{16}$ 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.

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。

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