Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.5K
Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
1.5K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.7K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.7K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.5K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.5K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.3K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.3K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.5K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.5K
G-protein Coupled Receptors01:21

G-protein Coupled Receptors

132.2K
G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
132.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Experimental Certification of Ensembles of High-Dimensional Quantum States with Independent Quantum Devices.

Physical review letters·2026
Same author

Demonstration of Discrete-Time Quantum Walks and Observation of Topological Edge States in a Superconducting Qutrit Chain.

Physical review letters·2026
Same author

Implementation and topological characterization of Weyl exceptional rings in quantum-mechanical systems.

Science bulletin·2025
Same author

Measuring topological invariants for higher-order exceptional points in quantum three-mode systems.

Nature communications·2024
Same author

Robust discriminator of chiral molecules via a topological invariant.

Optics letters·2024
Same author

Long-distance transmission of arbitrary quantum states between spatially separated microwave cavities.

Optics express·2024

Related Experiment Video

Updated: Feb 15, 2026

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
13:37

Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

Published on: April 1, 2013

16.7K

Tunable coupling of spin ensembles.

Feng-Yang Zhang, Chui-Ping Yang

    Optics Letters
    |February 6, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Spin ensembles offer long coherence times for quantum memory. This study demonstrates tunable coupling between spin ensembles using a superconducting flux qubit, enabling high-fidelity quantum information transfer.

    More Related Videos

    Ensemble Force Spectroscopy by Shear Forces
    07:30

    Ensemble Force Spectroscopy by Shear Forces

    Published on: July 26, 2022

    1.9K
    Production of Dynein and Kinesin Motor Ensembles on DNA Origami Nanostructures for Single Molecule Observation
    08:09

    Production of Dynein and Kinesin Motor Ensembles on DNA Origami Nanostructures for Single Molecule Observation

    Published on: October 15, 2019

    7.1K

    Related Experiment Videos

    Last Updated: Feb 15, 2026

    Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance
    13:37

    Template Directed Synthesis of Plasmonic Gold Nanotubes with Tunable IR Absorbance

    Published on: April 1, 2013

    16.7K
    Ensemble Force Spectroscopy by Shear Forces
    07:30

    Ensemble Force Spectroscopy by Shear Forces

    Published on: July 26, 2022

    1.9K
    Production of Dynein and Kinesin Motor Ensembles on DNA Origami Nanostructures for Single Molecule Observation
    08:09

    Production of Dynein and Kinesin Motor Ensembles on DNA Origami Nanostructures for Single Molecule Observation

    Published on: October 15, 2019

    7.1K

    Area of Science:

    • Quantum Information Science
    • Superconducting Quantum Computing
    • Quantum Memory

    Background:

    • Spin ensembles are crucial for quantum memory due to their long coherence times.
    • Effective control over spin ensemble coupling is essential for quantum information processing.

    Purpose of the Study:

    • To propose and demonstrate a method for tunable coupling between spin ensembles.
    • To utilize a superconducting flux qubit as a coupler for enhanced quantum control.

    Main Methods:

    • Implementing a superconducting flux qubit as an intermediary coupler.
    • Engineering the interaction between spin ensembles via the flux qubit.

    Main Results:

    • Achieved tunable coupling between distinct spin ensembles.
    • Demonstrated the potential for high-fidelity, accelerated adiabatic transfer of quantum information.

    Conclusions:

    • The proposed method enables precise control over spin ensemble interactions.
    • This technique advances the development of robust quantum memory and information processing architectures.