气候变化领域集成服务门户(CCPortal): Bose polarons near quantum criticality

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DOI	10.1126/science.aax5850
	Bose polarons near quantum criticality
	Yan Z.Z.; Ni Y.; Robens C.; Zwierlein M.W.
发表日期	2020
ISSN	0036-8075
起始页码	190
结束页码	194
卷号	368 期号:6487
英文摘要	The emergence of quasiparticles in interacting matter represents one of the cornerstones of modern physics. However, in the vicinity of a quantum critical point, the existence of quasiparticles comes under question. Here, we created Bose polarons near quantum criticality by immersing atomic impurities in a Bose-Einstein condensate (BEC) with near-resonant interactions. Using radiofrequency spectroscopy, we probed the energy, spectral width, and short-range correlations of the impurities as a function of temperature. Far below the superfluid critical temperature, the impurities formed well-defined quasiparticles. Their inverse lifetime, given by their spectral width, increased linearly with temperature at the so-called Planckian scale, consistent with quantum critical behavior. Close to the BEC critical temperature, the spectral width exceeded the impurity's binding energy, signaling a breakdown of the quasiparticle picture. © 2020 The Authors.
关键词	physics quantum mechanics spectroscopy article critical temperature radiofrequency spectroscopy signal transduction
语种	英语
来源机构	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133580
推荐引用方式 GB/T 7714	Yan Z.Z.,Ni Y.,Robens C.,et al. Bose polarons near quantum criticality[J]. Science,2020,368(6487).
APA	Yan Z.Z.,Ni Y.,Robens C.,&Zwierlein M.W..(2020).Bose polarons near quantum criticality.,368(6487).
MLA	Yan Z.Z.,et al."Bose polarons near quantum criticality".368.6487(2020).