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Related Concept Videos

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...
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule01:10

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1  triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the others.
2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other axis.
Quantum Numbers02:43

Quantum Numbers

It is said that the energy of an electron in an atom is quantized; that is, it can be equal only to certain specific values and can jump from one energy level to another but not transition smoothly or stay between these levels.
2D NMR: Overview of Homonuclear Correlation Techniques01:16

2D NMR: Overview of Homonuclear Correlation Techniques

Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
COSY90 is the standard two-dimensional (2D) COSY experiment that...

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Related Experiment Video

Updated: Jun 4, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Numerical simulation of NQR/NMR: Applications in quantum computing.

Denimar Possa1, Anderson C Gaudio, Jair C C Freitas

  • 1Departamento de Fı´sica, Universidade Federal do Espı´rito Santo, 29075-910 Vitória, ES, Brazil.

Journal of Magnetic Resonance (San Diego, Calif. : 1997)
|February 18, 2011
PubMed
Summary

A new Mathematica program simulates nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) experiments. This versatile tool aids quantum computing research by modeling complex spin interactions for advanced applications.

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Last Updated: Jun 4, 2026

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

Area of Science:

  • Physics
  • Quantum Computing
  • Spectroscopy

Background:

  • Nuclear Magnetic Resonance (NMR) and Nuclear Quadrupole Resonance (NQR) are powerful spectroscopic techniques.
  • Simulating complex spin interactions is crucial for advancing NMR/NQR applications, particularly in quantum computing.
  • Existing simulation tools may lack the flexibility to handle diverse experimental conditions and quantum computing specific requirements.

Purpose of the Study:

  • To present a versatile numerical simulation program for both NMR and NQR experiments.
  • To facilitate applications in quantum computing by implementing specific features.
  • To provide a flexible tool applicable to a wide range of experimental scenarios.

Main Methods:

  • Developed a simulation program using the Mathematica package.
  • Employed the interaction picture to compute nuclear spin interactions without assumptions on their relative strengths.
  • Implemented features for quantum computing, including elliptically polarized radiofrequency and average Hamiltonian expansion terms.

Main Results:

  • The program successfully simulates various NQR and quadrupole-perturbed NMR experiments.
  • Demonstrated the program's flexibility across different field strengths (zero to high-field NMR).
  • Showcased capabilities for quantum computing applications, including state preparation and logic gate implementation.

Conclusions:

  • The developed Mathematica program offers a versatile and flexible platform for simulating NMR and NQR experiments.
  • The program's features are well-suited for advancing quantum computing research using NMR/NQR.
  • The simulation tool and examples are made freely available to the scientific community.