Tripartite states Bell-nonlocality sudden death in a spin environment with multisite interaction

Tis paper demonstrates that multipartite Bell-inequality violations can be fully destroyed in a finite time in three- qubit states coupled to a general XY spin-chain with a three-site interaction environment. The Mermin Ardehali- Belinksii-Klyshko inequality is used to detect the degree of nonlocality, as measured by the extent of their violations. The effects of system-environment couplings, the size of degrees of freedom of the environment and the strength of the three-site interaction on the Bell-inequality violations are given. The results indicate that the Bell-inequality violations of the tripartite states will be completely destroyed by decoherence under certain conditions for the GHZ state. The decoherence-free subspaces of our model are identified and the entanglement of quantum states is also discussed.

Tripartite states Bell-nonlocality sudden death in a quantum-critical environment

We demonstrate that multipartite Bell-inequalities violations can be fully destroyed in finite time in three-qubit states under a quantum-critical environment, which is an Ising model in a transverse field. We use the Mermin- Ardehali-Belinksii-Klyshko （MABK） inequality to detect the degree of nonlocality as measured by the extent of their violations. The effects of system-environment couplings, the size of degrees of freedom of environment and the strength of transverse field on the Bell-inequality violations are given for two different initial states, namely, the W class and GHZ class states. The results indicute that the Bell-inequality violations of the tripartite states will be completely destroyed by the decoherence under certain conditions.

MOOCs:传统大学的警钟还是丧钟

从应然的角度看,大学的重中之重是人才培养,人才培养的重中之重是课程。MOOCs的迅猛发展大有动摇传统大学根基之势。但从实然的角度看,国内外的知名大学都是以科学研究赢得地位和荣誉的,学生慕名而学的MOOCs并没有大学知名度那样的高水准。MOOCs彰显了控制学费增长、推进教育公平、转变教学模式、彰显教师价值、完善自主学习、增进学习自由的价值诉求。但传统大学不仅是课程实施场所,它还是学生发展人际关系和受隐性课程濡染的场所,更是公认的、权威的学位颁发机构以及国家实现规训教育、传承中华文化和思想的机构。MOOCs对大学进行课程、教学、教师相关的改革是一个警钟,而不是敲响了大学的丧钟。

成长的代价——试论《钟罩》中的女性意识

《钟罩》虽然是美国自白派著名女诗人西尔维亚·普拉斯的自传体小说,但相当充分地反映了社会生活的本质。从女性的成长过程中逐渐萌生的自我意识着手,分析诗人独特的女性价值观,反叛意识以及对女性独立的深刻理解,可揭示出现代社会的冷酷和虚伪对人性,尤其是对女性的人性的桎梏和扼杀。

时光流转百感生——论林徽因诗歌中的生命主题

林徽因作为我国著名的女诗人,一生留下许多经典,在她的诗作中生命主题的诗歌占了大约三分之一。生命的流逝和终结,是每个人必须面对的事实,而这种事实在诗人林徽因眼中却有不同的意境。她对于生命的体会、对于死亡的思考几乎涵盖了其整个人生,并且这种思考是随着岁月的流逝和现实生活的残酷而日益深沉的。她对生命体会是从最初即使面对死亡还怀抱希望,到中期倍受死亡绝望和生命信念矛盾的煎熬,再到最后面对死亡、看透生命、终究豁达的过程。而这一过程却鲜少受到研究者的关注,本文就从理性和感性的角度共同出发,探讨这一问题,从而揭示一个立体的、圆形的、文化的林徽因。

水·黑·镜——从精神分析视野解读西尔维亚·普拉斯的《钟形罩》

《钟形罩》是美国著名诗人西尔维亚.普拉斯的自传体小说。小说在笼罩死亡阴影的情结里,忠实记录了女主人公孤独、绝望与挣扎的心灵历程。拟从关注主人公的精神危机和死亡情结出发,根据精神分析理论,围绕文本中"水、黑色和镜子"等主要意象,分析该小说的死亡主题。

西尔维亚·普拉斯《钟形罩》中埃斯特“向死而在”的哲学解读

《钟形罩》一书中埃斯特的生死抉择与灵肉博弈契合了海德格尔关于“向死而在”的哲学思想,埃斯特力图以生命的完结和选取他人此在去理解此在的完整性,最终得以向死而在,意识到此在是自我存在的唯一选择。埃斯特的向死而在给处于社会这个无形的钟形罩下的美国女性带来希望,也赋予女性关于生命意义新的理解。

Bell-Nonlocality Dynamics of Three Remote Atoms in Tavis–Cummings and Jaynes–Cummings Models

We study the Bell-nonlocality dynamics of three remote atoms, two of which are trapped in one single-mode cavity and the third atom is trapped in another remote single-mode cavity. The interactions between the atoms and the cavity modes are studied via Tavis Cummings and Jaynes Cummings models. Here, the two single-mode cavities are introduced to simulate two different enviroments of the three atoms. The tripartite nonlocal correlations are studied in terms of the Svetlichny inequality and the WWZB inequality, respectively. The results show that the tripartite Bellnonlocality sudden death will occur for the W state and GHZ state initial conditions. The detailed results demonstrate that the tripartite nonlocality of GHZ state is more robust than that of W state when suffering from the effect of environments.

《死在午后》:一部文艺思想来源书——论海明威《丧钟为谁而鸣》对《死在午后》文艺思想的实践

尽管海明威的非虚构作品《死在午后》和长篇小说《丧钟为谁而鸣》的文坛声誉迥然不同,二者在文艺思想上却有着潜在的关联性。《死在午后》是一部在斗牛叙事中蕴涵着丰富文艺思想的斗牛专著。其中的文艺思想直接预示着《丧钟为谁而鸣》的形成,可以看作是《丧钟为谁而鸣》文艺思想的来源书。本文从海明威的文艺思想和审美追求视角出发,将《死在午后》和《丧钟为谁而鸣》的创作过程视为一种一脉相承的创作实践,并从直面死亡的真实情感、“如何观看”的叙事焦点、相得益彰的文本结构以及异曲同工的人物刻画四个方面详细阐明后者是对前者文艺思想的继承和发展,旨在揭示两部作品中长期被学术界忽视的关联性,为海明威文艺思想研究提供一种新的视角。