Direct observation of deterministic macroscopic entanglement

doi:10.1126/science.abf2998

GSTDTAP > 气候变化

DOI	10.1126/science.abf2998
	Direct observation of deterministic macroscopic entanglement
	Shlomi Kotler; Gabriel A. Peterson; Ezad Shojaee; Florent Lecocq; Katarina Cicak; Alex Kwiatkowski; Shawn Geller; Scott Glancy; Emanuel Knill; Raymond W. Simmonds; José Aumentado; John D. Teufel
	2021-05-07
发表期刊	Science
出版年	2021
英文摘要	Quantum entanglement occurs when two separate entities become strongly linked in a way that cannot be explained by classical physics; it is a powerful resource in quantum communication protocols and advanced technologies that aim to exploit the enhanced capabilities of quantum systems. To date, entanglement has generally been limited to microscopic quantum units such as pairs or multiples of single ions, atoms, photons, and so on. Kotler et al. and Mercier de Lépinay et al. demonstrate the ability to extend quantum entanglement to massive macroscopic systems (see the Perspective by Lau and Clerk). Entanglement of two mechanical oscillators on such a large length and mass scale is expected to find widespread use in both applications and fundamental physics to probe the boundary between the classical and quantum worlds. Science , this issue p. [622][1], p. [625][2]; see also p. [570][3] Quantum entanglement of mechanical systems emerges when distinct objects move with such a high degree of correlation that they can no longer be described separately. Although quantum mechanics presumably applies to objects of all sizes, directly observing entanglement becomes challenging as masses increase, requiring measurement and control with a vanishingly small error. Here, using pulsed electromechanics, we deterministically entangle two mechanical drumheads with masses of 70 picograms. Through nearly quantum-limited measurements of the position and momentum quadratures of both drums, we perform quantum state tomography and thereby directly observe entanglement. Such entangled macroscopic systems are poised to serve in fundamental tests of quantum mechanics, enable sensing beyond the standard quantum limit, and function as long-lived nodes of future quantum networks. [1]: /lookup/doi/10.1126/science.abf2998 [2]: /lookup/doi/10.1126/science.abf5389 [3]: /lookup/doi/10.1126/science.abh3419
领域	气候变化 ; 资源环境
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文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/325941
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Shlomi Kotler,Gabriel A. Peterson,Ezad Shojaee,et al. Direct observation of deterministic macroscopic entanglement[J]. Science,2021.
APA	Shlomi Kotler.,Gabriel A. Peterson.,Ezad Shojaee.,Florent Lecocq.,Katarina Cicak.,...&John D. Teufel.(2021).Direct observation of deterministic macroscopic entanglement.Science.
MLA	Shlomi Kotler,et al."Direct observation of deterministic macroscopic entanglement".Science (2021).