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Studies Involving Atoms in High Rydberg States

涉及高里德堡态原子的研究

基本信息

批准号：
1904294
负责人：
F. Barry Dunning
金额：
$ 56.01万
依托单位：
William Marsh Rice University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1904294&HistoricalAwards=false
关键词：
Studies Involving Atoms Rydberg States

项目摘要

In this project atoms in carefully engineered states that possess sizable internal energy, termed excited states, are used to study how atoms interact with one another together with the outcomes of such interactions. Atom-atom interactions, for example, lie at the very heart of many of the protocols proposed for quantum information processing and provide a novel means to probe phenomena such as magnetism and superconductivity. Laser beams are used to create excited atomic states whose physical characteristics, and hence interactions, are then manipulated using a carefully tailored series of pulsed electric fields. Use of such "designer atoms" enables atom-atom interactions to be probed in great detail and allows creation of novel chemical bonds and new molecular species. The laser-created atoms are large and lie at the interface between the microscopic word, characterized by quantum theory, and the larger classical world governed by Newton's Laws. This work provides a bridge between these two realms and helps illuminate the transition from quantum to classical behavior.Atoms in high-n Rydberg states are used to study strongly-coupled Rydberg systems, to generate long-lived two-electron-excited "planetary atoms," and to explore the physical and chemical properties of ultralong-range Rydberg molecules which comprise a Rydberg atom in whose electron cloud are embedded one, or more, weakly-bound ground state atoms. The work involves high-n, n~200-400, strontium Rydberg atoms created in both hot atomic beams and in ultracold atom clouds using multiphoton laser excitation. Strongly interacting Rydberg systems are created by exploiting dipole blockade and focused laser beams to create two, or more, Rydberg atoms with well-defined initial separations. Their mutual interactions are then increased by exciting them to higher-lying states using protocols developed previously to engineer high-n states with pulsed electric fields. The time evolution of the product strongly coupled system is examined to explore energy interchange and to search for long-lived configurations where, due to their correlated motions, the excited electrons remain far apart. Planetary atoms are created by first placing the Rydberg electron in a near-circular orbit and then exciting the second inner valence electron to a high-lying state. Rydberg molecule formation is identified spectroscopically through shifts in their excitation spectra. Such shifts also illuminate their structure and properties. The present studies promise new insights into the behavior of strongly interacting few-body systems which form the basis for many protocols proposed for quantum information processing and, by extension, into the behavior of many-body systems where interactions give rise to a wide variety of phenomena fundamental to condensed matter physics. The work also furnishes information on physics in the ultra-fast ultra-intense regime and speaks to the engineering of low-lying atomic states using attosecond laser pulses.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

在这个项目中，原子处于精心设计的状态，具有相当大的内部能量，称为激发态，用于研究原子如何相互作用以及这种相互作用的结果。例如，原子-原子相互作用是许多为量子信息处理提出的协议的核心，并提供了一种探测磁性和超导性等现象的新方法。激光束被用来产生激发的原子态，其物理特性，因此相互作用，然后使用一系列精心定制的脉冲电场来操纵。使用这样的“设计者原子”使得原子-原子相互作用能够被非常详细地探测，并且允许创建新的化学键和新的分子种类。激光产生的原子很大，位于以量子理论为特征的微观世界和由牛顿定律支配的更大的经典世界之间的界面。高n里德伯态的原子被用来研究强耦合里德伯体系，产生长寿命的双电子激发的“行星原子”，并探索由一个里德伯原子组成的超长程里德伯分子的物理和化学性质，其中的电子云嵌入一个或多个里德伯原子，弱束缚基态原子这项工作涉及高n，n~200-400，锶里德伯原子创建在热原子束和超冷原子云使用多光子激光激发。强相互作用的里德伯系统是通过利用偶极封锁和聚焦激光束来创建两个或多个具有良好定义的初始间距的里德伯原子而创建的。然后，通过使用先前开发的协议将它们激发到更高的状态来增加它们的相互作用，以利用脉冲电场来设计高n态。的产品强耦合系统的时间演化的检查，探索能量交换和寻找长寿命的配置，由于它们的相关运动，激发的电子保持远离。行星原子是通过首先将里德伯电子置于近圆形轨道上，然后将第二个内层价电子激发到高位态而产生的。里德伯分子的形成是通过其激发光谱的位移光谱识别。这种变化也阐明了它们的结构和性质。目前的研究承诺新的见解强烈相互作用的少体系统的行为，形成了许多协议的基础上提出的量子信息处理，并通过扩展，到多体系统的行为，其中相互作用引起了各种各样的现象凝聚态物理学的基础。这项工作还提供了超快超强机制中的物理信息，并谈到了使用阿秒激光脉冲的低原子态工程。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（12）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Giant cross sections for L changing in Rydberg-Rydberg collisions

DOI：
10.1103/physreva.102.022805
发表时间：
2020-08
期刊：
Physical Review A
影响因子：
2.9
作者：
S. Yoshida;J. Burgdörfer;G. Fields;R. Brienza;F. Dunning
通讯作者：
S. Yoshida;J. Burgdörfer;G. Fields;R. Brienza;F. Dunning

Loss rates for high- n, 49≲n≲150, 5sns ( S13 ) Rydberg atoms excited in an Sr84 Bose-Einstein condensate

在 Sr84 玻色-爱因斯坦凝聚态中激发的高 n, 49−n−150, 5sns (S13) 里德伯原子的损失率

DOI：
10.1103/physreva.102.063317
发表时间：
2020
期刊：
Physical Review A
影响因子：
2.9
作者：
Kanungo, S. K.;Whalen, J. D.;Lu, Y.;Killian, T. C.;Dunning, F. B.;Yoshida, S.;Burgdörfer, J.
通讯作者：
Burgdörfer, J.

L -changing through very-long-range interactions in high- n , n ∼300, Rydberg-Rydberg collisions

L - 在高 n、n ≤ 300、里德堡-里德堡碰撞中通过超远距离相互作用发生变化

DOI：
10.1088/1742-6596/1412/14/142030
发表时间：
2020
期刊：
Journal of Physics: Conference Series
影响因子：
0
作者：
Yoshida, S;Burgdörfer, J;Fields, G;Brienza, R;Dunning, F B
通讯作者：
Dunning, F B

5p1/2nℓj autoionizing states of strontium for 0≤ℓ≤5

5p1/2n−j 0−−5 锶的自电离态

DOI：
10.1103/physreva.107.043112
发表时间：
2023
期刊：
Physical Review A
影响因子：
2.9
作者：
Yoshida, S.;Burgdörfer, J.;Brienza, R.;Fields, G.;Dunning, F. B.
通讯作者：
Dunning, F. B.

Resolving rotationally excited states of ultralong-range Rydberg molecules

解析超长程里德伯分子的旋转激发态

DOI：
10.1103/physreva.106.022809
发表时间：
2022
期刊：
Physical Review A
影响因子：
2.9
作者：
Lu, Y.;Whalen, J. D.;Kanungo, S. K.;Killian, T. C.;Dunning, F. B.;Yoshida, S.;Burgdörfer, J.
通讯作者：
Burgdörfer, J.