Extremely High Q-factor Mechanical Modes in Quartz Bulk Acoustic Wave Resonators at MilliKelvin Temperature

被引：2
|
作者：
Goryachev, M. [1 ]
Creedon, D. L. [1 ]
Ivanov, E. N. [1 ]
Galliou, S. [2 ]
Bourquin, R.
Tobar, M. E. [1 ]
机构：
[1] Univ Western Australia, ARC Ctr Excellence Engn Quantum Syst, 35 Stirling Highway, Crawley, WA 6009, Australia
[2] ENSMM, FEMTO ST Inst, Dept Time & Frequency, F-25000 Besancon, France
来源：
ELEVENTH INTERNATIONAL CONFERENCE ON QUANTUM COMMUNICATION, MEASUREMENT AND COMPUTATION (QCMC) | 2014年 / 1633卷
关键词：
QUANTUM GROUND-STATE; MOTION;
D O I：
10.1063/1.4903104
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate that Bulk Acoustic Wave (BAW) quartz resonator cooled down to millikelvin temperatures are excellent building blocks for hybrid quantum systems with extremely long coherence times. Two overtones of the longitudinal mode at frequencies of 15.6 and 65.4 MHz demonstrate a maximum f.Q product of 7.8x10(16) Hz. With this result, the Q-factor in such devices near the quantum ground state can be four orders of magnitude better than previously attained in other mechanical systems. Tested quartz resonators possess the ultra low acoustic losses crucial for electromagnetic cooling to the phonon ground state.
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页码：90 / 92
页数：3
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