Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Atomic Nuclei: Nuclear Relaxation Processes

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.

Atomic Nuclei: Magnetic Resonance

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...

You might also read

Related Articles

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

Sort by

Same author

Universal Global Gates for a Fine-Structure Qubit in Strontium-88.

Physical review letters·2026

Same author

Generation of strong ultralow-phase-noise microwave fields with tunable ellipticity for ultracold polar molecules.

The Review of scientific instruments·2026

Same author

High-fidelity collisional quantum gates with fermionic atoms.

Nature·2026

Same author

Learning Mixed Quantum States in Large-Scale Experiments.

Physical review letters·2026

Same author

Observation of emergent scaling of spin-charge correlations at the onset of the pseudogap.

Proceedings of the National Academy of Sciences of the United States of America·2026

Same author

Chiral Graviton Modes on the Lattice.

Physical review letters·2025

Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026

Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026

Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026

Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026

Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026

Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Mar 25, 2026

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence

Published on: June 13, 2020

Designing frustrated quantum magnets with laser-dressed Rydberg atoms.

Alexander W Glaetzle^1,2, Marcello Dalmonte^1,2, Rejish Nath^1,2,3

¹Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria.

Physical Review Letters

|May 16, 2015

Summary

This summary is machine-generated.

Researchers demonstrate a method to create diverse quantum magnetism models using cold alkali atoms. This technique allows tuning spin interactions for exploring exotic quantum phenomena in experiments.

More Related Videos

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Related Experiment Videos

Last Updated: Mar 25, 2026

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence

In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence

Published on: June 13, 2020

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Gradient Echo Quantum Memory in Warm Atomic Vapor

Gradient Echo Quantum Memory in Warm Atomic Vapor

Published on: November 11, 2013

Area of Science:

Atomic physics
Quantum magnetism
Condensed matter physics

Background:

Lattice spin models are crucial for understanding quantum magnetism.
Realizing diverse spin Hamiltonians experimentally is challenging.

Purpose of the Study:

To propose a method for realizing a broad class of lattice spin-1/2 models with tunable interactions.
To enable the exploration of exotic quantum magnetism phenomena.

Main Methods:

Utilizing cold alkali atoms in optical or magnetic trap arrays.
Representing spin-1/2 with atomic ground states.
Generating spin-spin interactions via van der Waals interactions between Rydberg states and laser light.
Tuning interaction strengths and symmetries using quantum interference.

Main Results:

Demonstrated realization of lattice spin-1/2 models with angular- and distance-dependent couplings.
Achieved tunability of diagonal, "flip-flop," "flip-flip," and "flop-flop" spin interactions.
Obtained energy scales comparable to experimental temperatures and decoherence times.

Conclusions:

The proposed method provides experimental access to exotic quantum magnetism, including emergent gauge theories and compass models.
State-of-the-art experiments can now explore these complex quantum systems.