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Supersymmetry, entanglement, and dynamics of polar paramagnetic molecules subject to combined electric, magnetic, and optical fields

受组合电场、磁场和光场影响的极性顺磁分子的超对称性、纠缠和动力学

基本信息

批准号：
247815525
负责人：
Professor Dr. Bretislav Friedrich
金额：
--
依托单位：
Institut für Mathematik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/247815525?language=en
关键词：
Supersymmetry entanglement dynamics polar paramagnetic

项目摘要

Interactions with external electric, magnetic or optical fields provide the chief means to manipulate the rotational and translational motion of neutral gas-phase molecules. Among recent developments are new methods to control the orientation and/or alignment of molecules as well as methods to deflect and focus their translational motion and to achieve molecular trapping. The importance of orientation comes also to light in novel applications such as attaining time-resolved photoelectron angular distributions, diffraction-from-within, separation of photodissociation products, deracemization, high-order harmonic generation and orbital imaging, quantum simulation and quantum computing.Herein we propose to study polar paramagnetic molecules subject to a combination of electric, magnetic, and optical fields. Among the most prominent examples of polar paramagnetic molecules are the ubiquitous doublet Sigma, triplet Sigma, and doublet Pi linear species, such as SrF, SO, and OH. Heteronuclear diatomics or larger polar molecules that contain a rare-earth atom often exhibit much higher orbital and spin electronic angular momenta and, therefore, correspondingly larger magnetic dipole moments. The opposite-parity Zeeman levels of polar paramagnetic molecules intersect at a particular value of the magnetic field at which they can be efficiently coupled by a superimposed weak electric field. Our preliminary results suggest that a superimposed optical field may create near-degeneracies of additional levels that could be coupled by the electrostatic field (or the electric dipole-dipole interaction in a molecular ensemble). Thereby, the triple-field combination could enable for instance fast switching of dipolar orientation and other dynamical effects that are not available in a dual magnetic and electric field combination alone. We plan to study the supersymmetry and entanglement of polar paramagnetic molecules in the triple-combination of electric, magnetic and optical fields. Like in the case of polar and polarizable molecules in combined electrostatic and optical fields, we hope that their supersymmetry will guide us to an analytic form of their eigenproperties. Furthermore, we will map out the achievable entanglement for a variety of geometric arrays of molecules and thereby pave the way for an alternative platform for quantum computing. We also propose to investigate the dynamics of polar paramagnetic molecules for a tailored time-dependence of the optical field and to connect the control strategies to the topology of the underlying molecular energy hypersurface in the combined fields, with special emphasis on the prominent role of the conical intersections of their Stark and Zeeman energy surfaces. We expect that this may lead to novel approaches to designing control fields for efficient and state-specific excitation schemes. These will include the control of quantum gates, a key ingredient of quantum computing with molecules.

与外部电场、磁场或光场的相互作用提供了操纵中性气相分子的旋转和平移运动的主要手段。最近的发展是控制分子取向和/或排列的新方法，以及偏转和聚焦其平移运动并实现分子捕获的方法。取向的重要性也在新的应用中显现出来，如获得时间分辨的光电子角分布，衍射从内部，分离的光解产物，去消旋，高次谐波产生和轨道成像，量子模拟和量子计算。极性顺磁分子最突出的例子是普遍存在的二重态Sigma、三重态Sigma和二重态Pi线性物质，如SrF、SO和OH。含有稀土原子的异质结或较大的极性分子通常表现出更高的轨道和自旋电子角动量，因此相应地具有更大的磁偶极矩。极性顺磁分子的相反宇称塞曼能级在磁场的特定值处相交，在该特定值处，它们可以通过叠加的弱电场有效地耦合。我们的初步结果表明，叠加的光场可能会产生近简并的额外的水平，可以耦合的静电场（或电偶极偶极相互作用的分子系综）。因此，三重场组合可以实现例如偶极取向的快速切换和单独在双磁场和电场组合中不可用的其他动态效应。我们计划研究极性顺磁分子在电、磁、光三重组合场中的超对称性和纠缠。就像在静电场和光场中的极性分子和可极化分子的情况一样，我们希望它们的超对称性将引导我们找到它们本征性质的解析形式。此外，我们还将绘制出各种几何分子阵列的可实现纠缠，从而为量子计算的替代平台铺平道路。我们还建议调查的动态极性顺磁分子量身定制的时间依赖性的光场和连接的控制策略的拓扑结构的基础上的分子能量超曲面的组合领域，特别强调其斯塔克和塞曼能量表面的锥形交叉的突出作用。我们预计，这可能会导致新的方法来设计控制领域的有效和特定状态的激励计划。这些将包括量子门的控制，这是分子量子计算的关键因素。

项目成果

期刊论文数量（9）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Supersymmetry and eigensurface topology of the spherical quantum pendulum

球形量子摆的超对称性和本征面拓扑

DOI：
10.1103/physreva.91.022111
发表时间：
2015
期刊：
影响因子：
0
作者：
B. Schmidt;B. Friedrich
通讯作者：
B. Friedrich

Effect of rotational-state-dependent molecular alignment on the optical dipole force

旋转状态相关的分子排列对光学偶极力的影响

DOI：
10.1103/physreva.94.013428
发表时间：
2016
期刊：
Physical Review A
影响因子：
2.9
作者：
Lee Yeong Kim;Ju Hyeon Lee;Hye Ah Kim;Sang-Kyu Kwak;Bretislav Friedrich;Bum Suk Zhao
通讯作者：
Bum Suk Zhao

Directional properties of polar paramagnetic molecules subject to congruent electric, magnetic and optical fields