搜索结果: 1-15 共查到“物理学 QED”相关记录59条 . 查询时间(0.078 秒)
近期，中国科学技术大学、中国科学院近代物理研究所、德国吉森大学等多家单位的科研人员在兰州重离子加速器冷却储存环HIRFL-CSRm上开展了类氟镍离子（58Ni19+）的双电子复合实验，在多电子体系中高阶QED效应研究方面获进展。
2022年1月10日，中国科学院上海光学精密机械研究所强场物理国家重点实验室研究团队在超强激光驱动的量子电动力学（QED）效应方面取得新的进展，揭示了非理想真空情况下的激光光强极限，相关研究成果发表于Photonics Research。
近日，中国科学院武汉物理与数学研究所原子分子外场理论组在少体分子束缚态量子电动力学（QED）理论研究中取得新进展，完整地导出了氢分子离子体系中自旋无关的高阶相对论mα6阶等效哈密顿量。氢分子离子H2+（以及D2+, HD+等）是最简单的分子体系，其振转跃迁频率在实验上可以被高精度测量，同时在理论上也可以采用束缚态QED理论进行高精度计算。因此人们可以借助氢分子离子精密谱来检验束缚态QED理论和导出...
近日，中科院武汉物理与数学研究所原子分子外场理论组在少体分子束缚态量子电动力学（QED）理论上取得了重要进展，完整地导出了氢分子离子体系中自旋无关的高阶相对论mα6阶等效哈密顿量。氢分子离子H2+（以及D2+, HD+等）是最简单的分子体系，其振转跃迁频率在实验上可以被高精度测量，同时在理论上也可以采用束缚态QED理论进行高精度计算。因此人们可以借助氢分子离子精密谱来检验束缚态QED理论和导出基本...
Sum rules for magnetic moments and polarizabilities in QED and chiral effective-field theory
Anomalous magnetic moment the cross section of discrete integral number arsene wenger reproduction
2014/12/20
We elaborate on a recently proposed extension of the Gerasimov-Drell-Hearn (GDH) sum rule which is achieved by taking derivatives with respect to the anomalous magnetic moment. The new sum rule featur...
腔QED中实现控制量子逻辑门的简易方案
量子光学 控制逻辑门 控制变量法 腔量子点动力学
2013/12/3
受之前有关控制量子门工作的启发，提出了一个在腔QED中实现CNOT门，Toffoli门以及Fredkin门的简易方案。本方案只涉及到原子与腔场之间的大失谐相互作用，腔场处于虚激发，量子信息不会在原子和腔之间传递，因此对腔场的品质因子要求大大降低，在目前的实验技术条件下，该方案是是可行的。
提出一个在腔QED中产生cluster-type的纠缠相干态的方案。基于三能级Λ型原子和双模腔场之间的大失谐相互作用下，原子的自发辐射可以被忽略。此外，腔场的初态是真空态。在这个方案中，对原子进行测量后，能够产生腔场的cluster型的纠缠相干态，并讨论了实验的可行性。
Quasiclassical approach to high-energy QED processes in strong laser and atomic fields
Quasiclassical high-energy QED processes strong laser atomic fields Atomic Physics
2012/4/20
An approach, based on the use of the quasiclassical Green's function, is developed for investigating high-energy quantum electrodynamical processes in combined strong laser and atomic fields. Employin...
QED model of the radiation escape from the matter
QED model radiation escape the matter Atomic Physics
2012/4/20
A simple model based on QED is presented for the estimation of contribution of the excited level few-photon decays to the radiation escape from the matter in the epoch of the cosmological hydrogen rec...
QED theory of the multiphoton cascade transitions in atoms
QED theory the multiphoton cascade transitions atoms Atomic Physics
2012/4/20
QED theory of multiphoton cascade transitions in atoms and ions is developed. This theory allows for the accurate description of the process important for astrophysical studies of the cosmological hyd...
Study of Simulation Method of Time Evolution in Rigged QED
Study of Simulation Method Time Evolution Rigged QED Atomic Physics
2012/4/20
We discuss how we formulate time evolution of physical quantities in the framework of the Rigged QED (Quantum Electrodynamics). The Rigged QED is a theory which has been proposed to treat dynamics of ...
强经典驱动腔QED系统的量子纠缠演化特性
量子光学 量子纠缠 转置矩阵负本征值 纠缠突然死亡
2013/10/15
研究了强经典场驱动模型下原子间纠缠与光场间纠缠的演化特性，其中原子与光腔场发生非共振相互作用。在给定其中某一原子与其耦合光腔场的条件，通过调节另一原子与其相互作用光场的失谐量，来分析原子间纠缠出现猝死行为的区域，以及两光场纠缠相干态的产生条件。
Regard Renormalization in QED as Functor between Categories
Regard Renormalization QED Functor between Categories Mathematical Physics
2011/9/19
Abstract: To unify the quantum electrodynamics (QED) under the first principle which brings the renormalization unartificially, we study Feynman diagrams in QED according to the set theory and the cat...
Finite-temperature nonlinear dynamics in cavity QED: A Thermofield Dynamics Approach
Finite-temperature dynamics Thermofield Dynamics Approach
2011/9/29
Heath-bath effects in the dynamics of atom + cavity system are studied. The temperature effects are explored using thermofield dynamics formalism. It is found that the dynamics of the system is sensit...
QED theory of the nuclear magnetic shielding in hydrogen-like ions
QED theory hydrogen-like ions
2011/9/6
The shielding of the nuclear magnetic moment by the bound electron in hydrogen-like ions is calculated ab initio with inclusion of relativistic, nuclear, and quantum electrodynamics (QED) effects. The...