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相关概念视频

Structural Isomerism02:34

Structural Isomerism

Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...

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Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
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Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

约瑟夫森连接阵列使用斯-爱因斯坦凝结物.

F S Cataliotti1, S Burger, C Fort

  • 1European Laboratory for Non-Linear Spectroscopy (LENS) and, Istituto Nationale per la Fisica della Materia (INFM), L.go E. Fermi 2, I-50125 Firenze, Italy.

Science (New York, N.Y.)
|August 4, 2001
PubMed
概括

科学家们观察到波斯-爱因斯坦凝结约瑟夫森连接阵列中的振荡原子电流. 这为测量关键电流和探索量子现象提供了一种新方法.

科学领域:

  • 量子物理学的量子物理学
  • 原子物理 原子物理
  • 凝聚物质物理学 凝聚物质物理学

背景情况:

  • 约瑟夫森连接是超导的关键.
  • 波斯-爱因斯坦凝聚物 (BEC) 提供了一个可控制的量子系统.
  • 之前的研究缺乏对原子约瑟夫森效应的直接观察.

研究的目的:

  • 直接观察一维约瑟夫森连接阵列中的振荡原子电流.
  • 在原子系统中测量约瑟夫森临界电流.
  • 使用BEC探索新的量子现象.

主要方法:

  • 使用激光静止波创建一个1D阵列的约瑟夫森连接.
  • 在潜在谷中捕获波斯-爱因斯坦凝聚物.
  • 通过原子干扰探测连贯性并测量振荡频率.

主要成果:

  • 直接观察振荡的原子电流.
  • 振荡频率的平方与微观道速率成正比.
  • 证明了对约瑟夫森临界电流与屏障高度的直接测量.

结论:

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  • 超流体阵列使超导约瑟夫森连接之外的新研究成为可能.
  • 这项工作将凝聚力学与离散的非线性介质物理联系起来.
  • 为研究量子现象提供了一个新的平台.