Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

286
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
286
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.2K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.2K
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
First-Order Circuits01:15

First-Order Circuits

1.6K
First-order electrical circuits, which comprise resistors and a single energy storage element - either a capacitor or an inductor, are fundamental to many electronic systems. These circuits are governed by a first-order differential equation that describes the relationship between input and output signals.
One common example of a first-order circuit is the RC (resistor-capacitor) circuit. These circuits are used in relaxation oscillators such as neon lamp oscillator circuits. When voltage is...
1.6K
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

592
The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
592
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

956
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
956

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same journal

Integrated diamond quantum spectrometer for high-resolution picoliter nuclear magnetic resonance (NMR) under ambient magnetic noise.

The Review of scientific instruments·2026
Same journal

Asymmetric-beam steady-state thermoreflectance for three-dimensional anisotropic thermal conductivity measurements.

The Review of scientific instruments·2026
Same journal

The next-generation particle x-ray temporal diagnostic for simultaneous time-resolved measurements of nuclear-burn and x-ray emission histories in support of basic-science and inertial confinement fusion experiments at OMEGA.

The Review of scientific instruments·2026
Same journal

Cavity-based non-destructive diagnostics of beam quadrupole moment and energy spread.

The Review of scientific instruments·2026
Same journal

Measuring reaction-in-flight neutrons via the activation technique.

The Review of scientific instruments·2026
Same journal

Design of a test rig for the investigation of water separation in two-phase annular flow.

The Review of scientific instruments·2026

相关实验视频

Updated: Sep 9, 2025

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

6.9K

在Rydberg原子实验中抑制电场噪声的过电路

Xinyan Xiang1, Shuaijie Li1, Alisher Duspayev1

  • 1Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.

The Review of scientific instruments
|September 4, 2025
PubMed
概括

一个新的开关电路最小化了雷德伯格原子的电场噪声,改善了量子科学实验. 这种装置可实现精确的控制和快速的电离脉冲,用于增强原子检测和光谱.

更多相关视频

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

12.9K
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

14.9K

相关实验视频

Last Updated: Sep 9, 2025

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
10:42

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh

Published on: May 3, 2019

6.9K
Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

12.9K
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

14.9K

科学领域:

  • 量子信息科学
  • 原子物理
  • 精准光谱学

背景情况:

  • 里德伯格原子对于量子信息科学和精确光谱学至关重要.
  • 为了最大限度地减少dc Stark效应引起的脱,需要电场噪声低于10 mV/cm.

研究的目的:

  • 引入一种新的电子电路,即开关,用于精确的低噪音电场控制里德伯格原子.
  • 为了实现同时低噪声操作和高压电离脉冲应用,用于原子检测.

主要方法:

  • 紧开关电路的设计和实施.
  • 对各种信号级别的电路噪声抑制性能进行分析.
  • 在瑞德伯格光谱和斯塔克光谱中应用接开关以进行校准.

主要成果:

  • 接开关有效减少电场噪声,使适合于Rydberg原子相干的条件.
  • 已经证明了雷德伯格线的光谱宽度减少和信号强度增加了两倍.
  • 使用Rydberg Stark光谱成功估计电场噪声和校准.

结论:

  • 在Rydberg原子实验中,关是一种简单但有效的电场控制解决方案.
  • 实现了更好的连贯时间和光谱分辨率,有利于基础和应用量子研究.
  • 这种电路可用于电场电离检测和校准等先进技术.