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Atomic Nuclei: Nuclear Spin State Overview

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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: Apr 19, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quantum mass acquisition in spinor Bose-Einstein condensates.

Nguyen Thanh Phuc¹, Yuki Kawaguchi², Masahito Ueda³

¹RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan.

Physical Review Letters

|December 20, 2014

Summary

This summary is machine-generated.

Researchers observed quantum mass acquisition in spinor Bose-Einstein condensates, a phenomenon where massless particles gain mass. This study reveals a significantly larger energy gap, making experimental observation feasible.

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Area of Science:

Quantum physics
Condensed matter physics
Bose-Einstein condensates

Background:

Quantum mass acquisition is a theoretical process where particles gain mass via quantum corrections.
Experimental observation is hindered by extremely small energy gaps.

Purpose of the Study:

To identify a suitable system for observing quantum mass acquisition.
To investigate the potential of spinor Bose-Einstein condensates for this phenomenon.

Main Methods:

Theoretical analysis of quantum corrections in spinor Bose-Einstein condensates.
Investigation of dynamical instability and emergent energy gaps.

Main Results:

Spinor Bose-Einstein condensates exhibit an energy gap 2 orders of magnitude larger than zero-point energy.
This large gap results from dynamical instability.
Quantum corrections decrease the propagation velocity of massive excitation modes.

Conclusions:

Spinor Bose-Einstein condensates are promising candidates for observing quantum mass acquisition.
The enhanced energy gap overcomes previous experimental limitations.
The findings offer new insights into particle mass generation in quantum systems.