Variational theory of angulons and their rotational spectroscopy
文献类型：期刊论文
| 作者 | Zeng, Zhongda1,2; Yakaboylu, Enderalp; Lemeshko, Mikhail3; Shi, Tao4,5 ; Schmidt, Richard6
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| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2023 |
| 卷号 | 158期号:13页码:134301 |
| 关键词 | HELIUM DROPLETS MOLECULES DYNAMICS |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/5.0135893 |
| 英文摘要 | The angulon, a quasiparticle formed by a quantum rotor dressed by the excitations of a many-body bath, can be used to describe an impurity rotating in a fluid or solid environment. Here, we propose a coherent state ansatz in the co-rotating frame, which provides a comprehensive theoretical description of angulons. We reveal the quasiparticle properties, such as energies, quasiparticle weights, and spectral functions, and show that our ansatz yields a persistent decrease in the impurity's rotational constant due to many-body dressing, which is consistent with experimental observations. From our study, a picture of the angulon emerges as an effective spin interacting with a magnetic field that is self-consistently generated by the molecule's rotation. Moreover, we discuss rotational spectroscopy, which focuses on the response of rotating molecules to a laser perturbation in the linear response regime. Importantly, we take into account initial-state interactions that have been neglected in prior studies and reveal their impact on the excitation spectrum. To examine the angulon instability regime, we use a singleexcitation ansatz and obtain results consistent with experiments, in which a broadening of spectral lines is observed while phonon wings remain highly suppressed due to initial-state interactions. (c) 2023 Author(s). |
| 学科主题 | Chemistry ; Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/28107]  |
| 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.Max Planck Inst Quantum Opt, D-85748 Garching, Germany 2.Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria 3.Austrian Acad Sci, Inst Quantum Opt & Quantum Informat, A-6020 Innsbruck, Austria 4.IST Austria, Campus 1, A-3400 Klosterneuburg, Austria 5.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 6.Univ Chinese Acad Sci, CAS Ctr Excellence Topol Quantum Computat, Sch Phys Sci, Beijing 100049, Peoples R China 7.Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany |
| 推荐引用方式 GB/T 7714 | Zeng, Zhongda,Yakaboylu, Enderalp,Lemeshko, Mikhail,et al. Variational theory of angulons and their rotational spectroscopy[J]. JOURNAL OF CHEMICAL PHYSICS,2023,158(13):134301. |
| APA | Zeng, Zhongda,Yakaboylu, Enderalp,Lemeshko, Mikhail,Shi, Tao,&Schmidt, Richard.(2023).Variational theory of angulons and their rotational spectroscopy.JOURNAL OF CHEMICAL PHYSICS,158(13),134301. |
| MLA | Zeng, Zhongda,et al."Variational theory of angulons and their rotational spectroscopy".JOURNAL OF CHEMICAL PHYSICS 158.13(2023):134301. |
入库方式： OAI收割
来源：理论物理研究所
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