Broadband reduction of quantum radiation pressure noise via squeezed light injection
Broadband reduction of quantum radiation pressure noise via squeezed light injection
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DOI：
10.1038/s41566-019-0527-y
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发表时间：
2018-12
期刊：
影响因子：
35
通讯作者：
M. Yap;J. Cripe;G. Mansell;T. McRae;R. Ward;B. Slagmolen;P. Heu;D. Follman;G. Cole;T. Corbitt;D. McClelland
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文献类型：
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作者：
M. Yap;J. Cripe;G. Mansell;T. McRae;R. Ward;B. Slagmolen;P. Heu;D. Follman;G. Cole;T. Corbitt;D. McClelland
海森伯不确定性原理指出，物体的位置不可能无限精确，因为物体的动量将完全不确定。这种动量的不确定性导致了未来测量中的位置不确定性。当连续测量物体的位置时，这种称为反作用的量子效应限制了可实现的精度。在音频波段，干涉仪型引力波探测器，这种反作用效应表现为量子辐射压力噪声（QRPN），并最终（但尚未）限制灵敏度。在这里，我们提出了使用光的量子工程状态来直接操纵这种量子反作用的系统中，它占主导地位的灵敏度在10-50 kHz的范围。我们观察到减少1.2分贝的量子反作用噪声。该实验是实现未来干涉引力波探测器QRPN降低并提高其灵敏度的关键一步。
The Heisenberg uncertainty principle states that the position of an object cannot be known with infinite precision, as the momentum of the object would then be totally uncertain. This momentum uncertainty then leads to position uncertainty in future measurements. When continuously measuring the position of an object, this quantum effect, known as back-action, limits the achievable precision,. In audio-band, interferometer-type gravitational-wave detectors, this back-action effect manifests as quantum radiation pressure noise (QRPN) and will ultimately (but does not yet) limit sensitivity. Here, we present the use of a quantum engineered state of light to directly manipulate this quantum back-action in a system where it dominates the sensitivity in the 10–50 kHz range. We observe a reduction of 1.2 dB in the quantum back-action noise. This experiment is a crucial step in realizing QRPN reduction for future interferometric gravitational-wave detectors and improving their sensitivity.