Emergence of a Sharp Quantum Collective Mode in a One-Dimensional Fermi Polaron

doi:10.1103/PhysRevX.11.041015

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	Emergence of a Sharp Quantum Collective Mode in a One-Dimensional Fermi Polaron
	Dolgirev, Pavel E.; Qu, Yi-Fan ; Zvonarev, Mikhail B.; Shi, Tao 2,7; Demler, Eugene 1
刊名	PHYSICAL REVIEW X
	2021
卷号	11 期号:4 页码:41015
关键词	INTERACTING FERMIONS
ISSN号	2160-3308
DOI	10.1103/PhysRevX.11.041015
英文摘要	The Fermi-polaron problem of a mobile impurity interacting with fermionic medium emerges in various contexts, ranging from the foundations of Landau's Fermi-liquid theory to electron-exciton interaction in semiconductors, to unusual properties of high-temperature superconductors. While classically the medium provides only a dissipative environment to the impurity, the quantum picture of polaronic dressing is more intricate and arises from the interplay of few- and many-body aspects of the problem. The conventional expectation for the dynamics of Fermi polarons is that it is dissipative in character, and any excess energy is rapidly emitted away from the impurity as particle-hole excitations. Here we report a strikingly different type of polaron dynamics in a one-dimensional system of the impurity interacting repulsively with the fermions. When the total momentum of the system equals the Fermi momentum, there emerges a sharp collective mode corresponding to long-lived oscillations of the polaronic cloud surrounding the impurity. This mode can be observed experimentally with ultracold atoms using Ramsey interferometry and radiofrequency spectroscopy.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27611]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Beijing 100049, Peoples R China 2.Harvard Univ, Dept Phys, Cambridge, MA 02138 USA 3.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 4.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 5.Zvonarev, Mikhail B.] Univ Paris Saclay, LPTMS, CNRS, F-91405 Orsay, France 6.Zvonarev, Mikhail B.] Russian Acad Sci, St Petersburg Dept, VA Steklov Math Inst, Fontanka 27, St Petersburg 191023, Russia 7.Zvonarev, Mikhail B.] Russian Quantum Ctr, Moscow 143025, Russia 8.Swiss Fed Inst Technol, Inst Theoret Phys, CH-8093 Zurich, Switzerland
推荐引用方式 GB/T 7714	Dolgirev, Pavel E.,Qu, Yi-Fan,Zvonarev, Mikhail B.,et al. Emergence of a Sharp Quantum Collective Mode in a One-Dimensional Fermi Polaron[J]. PHYSICAL REVIEW X,2021,11(4):41015.
APA	Dolgirev, Pavel E.,Qu, Yi-Fan,Zvonarev, Mikhail B.,Shi, Tao,&Demler, Eugene.(2021).Emergence of a Sharp Quantum Collective Mode in a One-Dimensional Fermi Polaron.PHYSICAL REVIEW X,11(4),41015.
MLA	Dolgirev, Pavel E.,et al."Emergence of a Sharp Quantum Collective Mode in a One-Dimensional Fermi Polaron".PHYSICAL REVIEW X 11.4(2021):41015.