9,951 research outputs found

    Area Law from Loop Quantum Gravity

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    We explore the constraints following from requiring the Area Law in the entanglement entropy in the context of loop quantum gravity. We find a unique solution to the single link wave-function in the large j limit, believed to be appropriate in the semi-classical limit. We then generalize our considerations to multi-link coherent states, and find that the area law is preserved very generically using our single link wave-function as a building block. Finally, we develop the framework that generates families of multi-link states that preserve the area law while avoiding macroscopic entanglement, the space-time analogue of "Schroedinger cat". We note that these states, defined on a given set of graphs, are the ground states of some local Hamiltonian that can be constructed explicitly. This can potentially shed light on the construction of the appropriate Hamiltonian constraints in the LQG framework.Comment: 6+5 pages, 2 figures, presentation improved, appendices added, revised version accepted for publication in Physical Review

    Theoretical Exploration on the Magnetic Properties of Ferromagnetic Metallic Glass: An Ising Model on Random Recursive Lattice

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    The ferromagnetic Ising spins are modeled on a recursive lattice constructed from random-angled rhombus units with stochastic configurations, to study the magnetic properties of the bulk Fe-based metallic glass. The integration of spins on the structural glass model well represents the magnetic moments in the glassy metal. The model is exactly solved by the recursive calculation technique. The magnetization of the amorphous Ising spins, i.e. the glassy metallic magnet is investigated by our modeling and calculation on a theoretical base. The results show that the glassy metallic magnets has a lower Curie temperature, weaker magnetization, and higher entropy comparing to the regular ferromagnet in crystal form. These findings can be understood with the randomness of the amorphous system, and agrees well with others' experimental observations.Comment: 11 pages, 5 figure

    流行性出血热患者1例的护理体会

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    Objective: To explore the nursing methods of patients with epidemic hemorrhagic fever. Methods: Through careful nursing, 1 case of patients with epidemic hemorrhagic fever, summed up the experience. Results: Patients with epidemic hemorrhagic fever were 2 days later improved, within 6 months to fully recover. Conclusion: With proper treatment and careful nursing, patients with epidemic hemorrhagic fever are able to fully recover.目的  探讨流行性出血热患者的护理方法。方法  通过1例流行性出血热患者的护理,总结其中的经验。结果  流行性出血热患者2天后好转出院,随防6个月完全恢复。结论  通过正确的治疗和细致的护理,流行性出血热患者能够完全恢复

    糖尿病的社区防治及日常护理

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    Diabetes mellitus is a kind of complex pathogenesis syndrome,and it is characterized by hyperglycemia. It was caused by heredity, environment, immunity and other factors. And it is one kind of common endocrine and metabolic. The incidence of diabetes mellitus is increasing., and it has been regarded as the world health problems that threaten human health. Early prevention and nursing of diabetes should be paid attention to.The article simply summarized the community prevention and daily care of diabetes mellitus,and provided experience for prevention of it and its complications.糖尿病是由遗传、环境、自身免疫力等多种因素导致的以高血糖为主特征的复合病因综合征,是一种常见的内分泌代谢性疾病。糖尿病的发病率呈逐渐上升趋势,已成为严重威胁人类健康的世界性卫生保健问题,因此,对糖尿病的早期防治及护理的应引起广泛重视。本文是对糖尿病的社区防治及日常生活护理的简单总结,为预防糖尿病及并发症的发生提供经验
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