Creation of Rydberg Polarons in a Bose Gas

被引：129

作者：

Camargo, F. ^{[1
]}

Schmidt, R. ^{[2
,4
,7
]}

Whalen, J. D. ^{[1
]}

Ding, R. ^{[1
]}

Woehl, G., Jr. ^{[1
,5
]}

Yoshida, S. ^{[6
]}

Burgdoerfer, J. ^{[6
]}

Dunning, F. B. ^{[1
]}

Sadeghpour, H. R. ^{[2
]}

Demler, E. ^{[3
]}

Killian, T. C. ^{[1
]}

机构：

[1] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA

[2] Harvard Smithsonian Ctr Astrophys, ITAMP, 60 Garden St, Cambridge, MA 02138 USA

[3] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[4] Swiss Fed Inst Technol, Inst Quantum Elect, CH-8093 Zurich, Switzerland

[5] Inst Estudos Avancados, BR-12228001 Sao Jose Dos Campos, SP, Brazil

[6] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria

[7] Max Planck Inst Quantum Opt, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 08期

基金：

美国国家科学基金会;

关键词：

STATES; MOLECULES; ATOMS;

D O I：

10.1103/PhysRevLett.120.083401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report spectroscopic observation of Rydberg polarons in an atomic Bose gas. Polarons are created by excitation of Rydberg atoms as impurities in a strontium Bose-Einstein condensate. They are distinguished from previously studied polarons by macroscopic occupation of bound molecular states that arise from scattering of the weakly bound Rydberg electron from ground-state atoms. The absence of a p-wave resonance in the low-energy electron-atom scattering in Sr introduces a universal behavior in the Rydberg spectral line shape and in scaling of the spectral width (narrowing) with the Rydberg principal quantum number, n. Spectral features are described with a functional determinant approach (FDA) that solves an extended Frohlich Hamiltonian for a mobile impurity in a Bose gas. Excited states of polyatomic Rydberg molecules (trimers, tetrameters, and pentamers) are experimentally resolved and accurately reproduced with a FDA.

引用

页数：6

共 46 条

[1] Bose polaron problem: Effect of mass imbalance on binding energy [J].