Feedback cooling of the normal modes of a massive electromechanical system to submillikelvin temperature

被引：55

作者：

Vinante, A. ^{[1
,2
]}

Bignotto, M. ^{[3
,4
]}

Bonaldi, M. ^{[1
,2
]}

Cerdonio, M. ^{[3
,4
]}

Conti, L. ^{[3
,4
]}

Falferi, P. ^{[1
,2
]}

Liguori, N. ^{[3
,4
]}

Longo, S. ^{[5
]}

Mezzena, R. ^{[2
,6
]}

Ortolan, A. ^{[5
]}

Prodi, G. A. ^{[2
,6
]}

Salemi, F. ^{[2
,6
]}

Taffarello, L. ^{[4
]}

Vedovato, G. ^{[4
]}

Vitale, S. ^{[2
,6
]}

Zendri, J. -P. ^{[4
]}

机构：

[1] CNR, Fdn Bruno Kessler, Ist Foton & Nanotecnol, I-38100 Trento, Italy

[2] Ist Nazl Fis Nucl, Sez Padova, Grp Coll Trento, I-38100 Trento, Italy

[3] Univ Padua, Dipartimento Fis, I-35131 Padua, Italy

[4] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[5] Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy

[6] Univ Trent, Dipartimento Fis, I-38100 Trento, Italy

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.101.033601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We apply a feedback cooling technique to simultaneously cool the three electromechanical normal modes of the ton-scale resonant-bar gravitational wave detector AURIGA. The measuring system is based on a dc superconducting quantum interference device (SQUID) amplifier, and the feedback cooling is applied electronically to the input circuit of the SQUID. Starting from a bath temperature of 4.2 K, we achieve a minimum temperature of 0.17 mK for the coolest normal mode. The same technique, implemented in a dedicated experiment at subkelvin bath temperature and with a quantum limited SQUID, could allow to approach the quantum ground state of a kilogram-scale mechanical resonator.

引用

页数：4

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