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Spontaneous Emission Originating from Atomic bec Interacting with a Single-Mode Quantized Field

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Communications in Theoretical Physics 2018年第6期69卷 711-721页

作者： E.Ghasemian M.K.Tavassoly Atomic and Molecular Group Faculty of Physics Yazd University

In this paper we present a general theoretical model for the interaction between a number of two-level atoms constituting Bose-Einstein condensate(bec) and a single-mode quantized field. In addition to the usual interacting terms, we take into account interatom as well as higher-order atom-field interactions. To simplify the Hamiltonian o system, after using the Bogoliubov approximation we proceed to calculate the transformed operators of atoms and field Then, to quantify the spontaneous emission, we get analytical expressions for the expectation value ofJ?z as the atomic population inversion(API), in the cases of number and coherent states for the atomic subsystem. Our results show that the above-mentioned model interaction leads to the appearance of collapse-revival phenomenon in API. In more detail the revival time may be tuned by adjusting the interatom interaction constant. Also, the damping process lowers the amplitude of API, but does not change the CR times for weak damping. Moreover, increasing the damping may decrease the number of CRs in a given interval of time such that no revival occurs. Briefly, it may be concluded that in the resonant case the revival times are insensitive to the change of the higher-order atom-field interaction constant and are affected only by the interatom interactions. Finally, we express that, how we can find a practical procedure to measure the quantum states of atoms in bec.

关键词：量子化原子 Hamiltonian 交往排放 bec 相互作用发源

bec分子基态和低激发态光谱性质和解析势能函数

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物理学报 2019年第5期68卷 64-71页

作者：张计才孙金锋施德恒朱遵略河南师范大学物理与材料科学学院新乡453007

bec是一个具有丰富低激发电子态的分子,本文基于动态权重完全活性空间自冾场方法获得的参考波函数,采用多参考组态相互作用方法对bec分子进行高精度的从头计算,获得了bec分子X^3Σ^-,A^3Π,b^1Δ,c^1Π和d^1Σ^+共5个电子态的势能曲线.... 详细信息

bec是一个具有丰富低激发电子态的分子,本文基于动态权重完全活性空间自冾场方法获得的参考波函数,采用多参考组态相互作用方法对bec分子进行高精度的从头计算,获得了bec分子X^3Σ^-,A^3Π,b^1Δ,c^1Π和d^1Σ^+共5个电子态的势能曲线.为了获得精确的光谱结果,在计算中考虑了标量相对论效应修正,并把相互作用能外推至完全基组极限.在此基础上获得了这些态的光谱常数和偶极距,以及一些允许跃迁的跃迁偶极距、弗兰克-康登因子和辐射寿命.最后,通过扩展的Rydberg函数拟合获得了基态势能曲线精确的解析表达式.

关键词：动态权重光谱常数跃迁特性 bec

Superconductivity of the FeSe/SrTiO3 Interface in View of BCS–bec Crossover

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Chinese Physics Letters 2019年第10期36卷 81-85页

作者：张书源苗光耀关佳其徐小凤刘冰杨芳王炜华朱学涛郭建东 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190 School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049 Songshan Lake Materials Laboratory Dongguan 523808 Beijing Academy of Quantum Information Sciences Beijing 100193

In paired Fermi systems,strong many-body effects exhibit in the crossover regime between the Bardeen–Cooper–Schrieffer(BCS)and the Bose–Einstein condensation(bec)*** concept of the BCS–bec crossover,which is studied intensively in the research field of cold atoms,has been extended to condensed *** by analyzing the typical superconductors within the BCS–bec phase diagram,we find that FeSe-based superconductors are prone to shift their positions in the BCS–bec crossover regime by charge doping or substrate substitution,since their Fermi energies and the superconducting gap sizes are *** at the interface of single-layer FeSe on SrTiO3 substrate,the superconductivity is relocated closer to the crossover unitary than other doped FeSe-based materials,indicating that the pairing interaction is effectively *** further show that hole-doping can drive the interfacial system into the phase with possible pre-paired electrons,demonstrating its flexible tunability within the BCS–bec crossover regime.

关键词： crossover bec regime

Treatment of Skin Cancer with a Selective Apoptotic-Inducing Curaderm<sup>bec5</sup>Topical Cream Containing Solasodine Rhamnosides

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International Journal of Clinical Medicine 2015年第5期6卷 326-333页

作者： Aruba Cham Bill Cham Australasian Medical Research Port Vila Republic of Vanuatu

Solasodine rhamnosides produced in plants as secondary metabolites, are safe and effective when treating a variety of cancers, including non-melanoma skin cancers. They are cytotoxic against multi-drug resistant tumor cells, stimulate lasting immunity against cancer, are not mutagenic and display anti-mutagenic properties. These antineoplastics, through cellular specific receptor-mediated actions, directly induce apoptosis by triggering extrinsic and intrinsic apoptotic pathways in cancer cells but not normal cells. Curadermbec5 contains solasodine rhamnosides and is a topical formulation for the treatment of keratoses and non-melanoma skin cancers. The mode of action, together with the selectivity towards cancer cells, with Curadermbec5 therapy, results in outstanding beneficial outcomes. This study shows graphically and pictorially that Curadermbec5 seeks and destroys basal cell carcinoma whilst normal skin cells replace the dead cancer cells during therapy, emanating into impressive cosmetic end results. The clinical observations with Curadermbec5 therapy reveal that initially the lesion size increases over four-fold due to the interaction of Curadermbec5 with deeper and more lateral tumor cells, followed by a decrease in size, ultimately, resulting in complete elimination of the basal cell carcinoma.

关键词： Skin Cancer bec Solamargine Curaderm Apoptosis Solasodine Rhamnosides

CET与bec语言测试的比较分析及其对商务英语专业教学的反拨研究

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中国多媒体与网络教学学报(中旬刊) 2022年第1期 46-49页

作者：伍园园广东工程职业技术学院

CET与bec是商务英语专业普遍采用的两种语言测试方式。通过比较分析这两种语言测试的异同,深层次挖掘二者在英语教学中的正向反拨作用,从客观和主观两个层面对商务英语专业教学进行内涵构建,明确商务英语专业教学成果导向评价标准和衡... 详细信息

CET与bec是商务英语专业普遍采用的两种语言测试方式。通过比较分析这两种语言测试的异同,深层次挖掘二者在英语教学中的正向反拨作用,从客观和主观两个层面对商务英语专业教学进行内涵构建,明确商务英语专业教学成果导向评价标准和衡量依据,优化教学组织、课程设置和师资,提炼凸显商务英语专业"工匠精神"的核心元素,将"工匠精神"培养融入专业教学全过程,有效推动高职商务英语专业课程教学内容改革。

关键词： CET bec 比较分析商务英语专业教学反拨

Solasodine Glycosides from the Eggplant in a Topical Cream Psorend<sup>bec</sup>Are Effective against Psoriasis

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International Journal of Clinical Medicine 2019年第3期10卷 174-182页

作者： Tania R. Chase Kai E. Cham Bill E. Cham Australasian Medical Research Port Vila Republic of Vanuatu

Background: Psoriasis is a chronic disease that can have significant effects on quality of life. Aim: To test whether the antineoplastic, antipathogenic plant derived secondary metabolites, solasodine glycosides, can treat psoriasis. Case Presentation: We report a case of a 54-year-old French-Vietnamese male who presented with diagnosed erythematous scaly annular recalcitrant psoriasis scattered throughout his body. Method: After failing conventional treatment regimens for over 10 years the patient received a trial with a topical cream formulation Psorendbec, containing solasodine glycosides, for his psoriasis. Result: Topical applications of Psorendbec twice daily resulted in complete resolution of cutaneous lesions after 4 weeks of treatment with no recurrence post 1 year after therapy. Conclusion: Topical Psorendbec therapy rapidly removes recalcitrant psoriasis with no apparent side effects.

关键词： Psoriasis bec Solasodine Glycosides Psorendbec Eggplant Devil’s Apple Black Nightshade

bec Speaking Study Tips

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海外求学 2004年第12期 40-41页

作者：许骏《海外求学》特约撰稿

众所周知，口语是bec四个单元中挑战性较大的一部分，并且口语考试的难度随着等级的提高而加大。bec口语考试分为三部分。第一部分是考生与考官的交流，着重于个人情况，比如学习工作，兴趣爱好。

关键词： bec 口语考试商务词汇商务英语考试考试范围应试策略

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bec or TOEIC

快乐阅读（开心辞典）（上） 2011年第16期 185-187页

作者：余茜武汉理工大学华夏学院

经济发展和办公环境的国际化使得职业领域对于英语的要求越来越高。而随着求职的压力越来越大,大学生们纷纷参加各种技能培训与测试,努力提高自己各方面的竞争能力。这两种发展趋势相结合,就造就了今天人们对于职业英语水平考试的关注... 详细信息

经济发展和办公环境的国际化使得职业领域对于英语的要求越来越高。而随着求职的压力越来越大,大学生们纷纷参加各种技能培训与测试,努力提高自己各方面的竞争能力。这两种发展趋势相结合,就造就了今天人们对于职业英语水平考试的关注。本文对bec和TOEIC这两种主流职业英语水平考试进行对比与分析,目的在于帮助广大考生做出适合自己的选择。

关键词：职业英语水平考试 bec TOEIC

Combination Treatment with bec and Cisplatin Synergistically Augments Anticancer Activity and Results in Increased Absolute Survival

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Journal of Cancer Therapy 2020年第8期11卷 470-482页

作者： B. E. Cham Australasian Medical Research Port Vila Republic of Vanuatu

Plant-derived bec with its main component solamargine possesses anticancer activities via its effect on a variety of biological pathways in a wide range of human cancer cells. High cure rates with bec therapy have been obtained in animals with deadly cancers, and, in humans with terminal cancers promising results have been reported. At a clinical level, optimal concentrations of bec have been established in a topical cream formulation Curaderm, for effective removal of skin cancers, but optimal concentrations of bec have not been reported for other cancers. The objective of this study was to determine whether combination therapy of Cisplatin with bec would result in synergism using cure rates as end points. bec on its own cures Sarcoma 180 in mice, whereas, Cisplatin on its own has no effect on Sarcoma 180 activity. A combination of bec and Cisplatin shows synergism, resulting in higher cure rates than bec and Cisplatin at comparable individual concentrations.

关键词： bec Solamargine Cisplatin Curaderm Anti-Cancer