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Related Concept Videos

Nuclear Magnetic Resonance (NMR): Overview01:07

Nuclear Magnetic Resonance (NMR): Overview

Nuclear magnetic resonance (NMR) is a phenomenon exhibited by certain nuclei that can absorb characteristic radio frequency radiation under certain conditions. NMR has been extensively applied in molecular spectroscopy and medical diagnostic imaging. In both these applications, the molecule or subject under study is placed in a magnetic field and irradiated with radio frequency energy.
NMR spectroscopy generates a spectrum where the characteristic absorption frequencies of the sample are...
Applications Of NMR In Biology01:25

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...
Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

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...
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis. This...
Atomic Nuclei: Nuclear Spin State Overview01:03

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...

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Related Experiment Video

Updated: May 19, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Recent advances in nuclear magnetic resonance quantum information processing.

Ben Criger1, Gina Passante, Daniel Park

  • 1Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|September 5, 2012
PubMed
Summary

Nuclear magnetic resonance (NMR) quantum information processing (QIP) advances, including decoupling and pulse engineering, enhance capabilities. These techniques benefit both NMR and other quantum computing architectures.

Related Experiment Videos

Last Updated: May 19, 2026

Gradient Echo Quantum Memory in Warm Atomic Vapor
10:00

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Area of Science:

  • Quantum information science
  • Quantum computing
  • Nuclear magnetic resonance spectroscopy

Background:

  • Nuclear magnetic resonance (NMR) is a foundational experimental platform for quantum information processing (QIP).
  • Continued development in NMR QIP is crucial for advancing quantum technologies.
  • NMR provides a testbed for novel quantum information techniques.

Purpose of the Study:

  • To review recent advancements in NMR-based quantum information processing.
  • To highlight the impact of decoupling, pulse engineering, and indirect nuclear control.
  • To discuss the broader applicability of these NMR QIP techniques.

Main Methods:

  • Focus on experimental techniques in NMR quantum information processing.
  • Review of progress in quantum control methods.
  • Analysis of decoupling sequences and pulse shaping.

Main Results:

  • Recent advances significantly enhance NMR quantum information processing capabilities.
  • Improved control techniques lead to more robust quantum operations.
  • Developments in NMR QIP have implications beyond NMR itself.

Conclusions:

  • NMR remains a vital platform for quantum information processing research.
  • Key techniques like decoupling and pulse engineering are transferable to other quantum architectures.
  • These advancements contribute to the broader field of quantum information science.