检索结果-南通市图书馆

Entanglement and Disentanglement from cascade beam-splitter for squeezed vacuum state inputs

Chinese Physics B 2004年第11期13卷 1881-1886页

作者：周清平方卯发刘小娟陈笑梅吴琴徐洪智 DepartmentofPhysics HunanNormalUniversityChangsha410081China AnhuiInstituteOpticsandFineMechanics ChineseAcademyofSciencesHefei230031China DepartmentofInformationandAutomatization JishouUniversityZhangjiajie427000China

Properties of the entanglement at the outputs of a cascade beam-splitter are investigated for two single-mode squeezed vacuum state inputs. It is shown that the entanglement depends on the squeezing amplitudes of the input states and the reflection coefficients of the cascade beam-splitter, and the composite phase shift Δ between the cascade beam-splitter and the input fields has a great effect on the entanglement. In particular, the properties of the entanglement of a cascade beam-splitter differ from those of only one beam-splitter. A further method for manipulating entanglement by adjusting the parameters of the cascade beam-splitter and the input fields is proposed.

关键词： entanglement Disentanglement cascade beam-splitter squeezed vacuum states

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Disentanglement of a Singlet Spin State in a Coincidence Stern-Gerlach Device

引用

Journal of Modern Physics 2019年第10期10卷 1247-1254页

作者： Per-Olof Westlund Hå kan Wennerstrô m Department of Chemistry Theoretical Chemistry Ume&aring University Ume&aring Sweden Department of Physical Chemistry Lund University Lund Sweden

We analyze the spin coincidence experiment considered by Bell in the derivation of Bells theorem. We solve the equation of motion for the spin system with a spin Hamiltonian, Hz, where the magnetic field is only in the z-direction. For the specific case of the coincidence experiment where the two magnets have the same orientation the Hamiltonian Hz commutes with the total spin Iz, which thus emerges as a constant of the motion. Bells argument is then that an observation of spin up at one magnet A necessarily implies spin down at the other B. For an isolated spin system A-B with classical translational degrees of freedom and an initial spin singlet state there is no force on the spin particles A and B. The spins are fully entangled but none of the spin particles A or B are deflected by the Stern-Gerlach magnets. This result is not compatible with Bells assumption that spin 1/2 particles are deected in a Stern-Gerlach device. Assuming a more realistic Hamiltonian Hz + Hx including a gradient in x direction the total Iz is not conserved and fully entanglement is not expected in this case. The conclusion is that Bells theorem is not applicable to spin coincidence measurement originally discussed by Bell.

关键词： Bells Theorem Disentanglement Stern-Gerlach Coincident Measurement Singlet Spin State

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BROWNIAN MOTION MODEL OF ENTANGLED POLYMERS AND SIMULATION FOR Disentanglement

引用

Science China Mathematics 1991年第5期34卷 546-552页

作者：钱敏平辛连忠雷功炎吴承训 Peking University Beijing 100871 PRC China Textile University Shanghai 200051 PRC

The dynamics of the center-of-mass of entangled polymer is assumed to be of 1-dimen-sional Brownian motion in a constrained tube. When the length fluctuation of the constrain-ed tube is neglected, the asymptotic relation between the relaxation time for disentangle-ment τ and the chain length N is obtained, i.e. τ～N3. Under conditions of the finite chainlength and the length fluctuation of an effective constrained tube, the dependence relation τ～N3.40±0.16 is obtained by computer simulation. This conclusion elucidates reasonably the knownexperimental results about the dynamics of real entangled polymers.

关键词： entangled polymer Brownian motion relaxation time for Disentanglement computer simulation.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Towards a molecular understanding of the electronic metal-support interaction(EMSI)in heterogeneous catalysis

引用

Green Energy & Environment 2023年第3期8卷 619-625页

作者： Keng Sang Ji Zuo Xiangxue Zhang Qianhong Wang Wenyao Chen Gang Qian Xuezhi Duan State Key Laboratory of Chemical Engineering East China University of Science and Technology130 Meilong RoadShanghai200237China

Tailoring the electronic metal-support interaction(EMSI)has attracted considerable interests as one of the most efficient approaches to improve both the activity and stability of metal catalysts in heterogeneous catalysis.In this viewpoint,we illustrate the methodology and relevant fundamentals on the Disentanglement,characterization,and interpretation of EMSI.Under the choice of monometallic catalyst over inert support,a combination of optimal experiment design,multimodal techniques,in situ characterization,with a comprehensive understanding of the underlying measurement protocols is highly desirable for a reliable determination of EMSI.Accordingly,not only the d-band filling but also d-band energy within the EMSI should be taken into consideration for providing general principles to guide the electron-promoting catalytic reaction.

关键词： EMSI Disentanglement Characterization Interpretation d-band

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quantum Disentanglement as the Physics behind Dark Energy

引用

Open Journal of Microphysics 2017年第1期7卷 1-27页

作者： Mohamed S. El Naschie Department of Physics Faculty of Science University of Alexandria Alexandria Egypt

A straightforward simple proof is given that dark energy is the natural conse-quence of a quantum Disentanglement physical process. Thus while the ordinary energy density of the cosmos is equal to half that of Hardy’s quantum probability of Entanglement i.e. where , the density of cosmic dark energy is consequently one minus divided by two i.e. . This result is in full agreement with all the numerous previous theoretical predictions as well as being in remarkable agreement with the overwhelming majority of cosmic accurate measurements and observations.

关键词： Quantum Gravity Quantum Entanglement Quantum Disentanglement E-Infinity Theory Dark Energy

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：