Spin-spin interactions

Science Daily, February 13 2013
http://www.sciencedaily.com/releases/2013/02/130221192736.htm

Summary of the above article

Professor Larry Hunter along with colleagues at Amherst College and the University of Texas have published a paper in the journal ‘Science’ describing their attempt to study long-range spin interactions between quanta. Such interactions have previously been proposed but not observed.

This picture depicts the long-range spin-spin interaction (blue wavy lines) in which the spin-sensitive detector on Earth’s surface interacts with geoelectrons (red dots) deep in Earth’s mantle. The arrows on the geoelectrons indicate their spin orientations, opposite that of Earth’s magnetic field lines (white arcs).
This picture depicts the long-range spin-spin interaction (blue wavy lines) in which the spin-sensitive detector on Earth’s surface interacts with geoelectrons (red dots) deep in Earth’s mantle. The arrows on the geoelectrons indicate their spin orientations, opposite that of Earth’s magnetic field lines (white arcs). Credit: Illustration: Marc Airhart (University of Texas at Austin) and Steve Jacobse (Northwestern University).

The physicists mapped electron polarisation resulting from the Earth’s geomagnetic field.

Based on a model of the Earth’s interior and a map of the geomagnetic field, they were able to estimate the magnitude and direction of electron spins. Every quanta has the property of spin, which can be thought of as an arrow pointing in a particular direction. The Earth’s magnetic field means that quanta or atomic particles in the Earth’s mantle do not have completely random direction, but instead some net orientation.

The experimenters have not been able to show any interaction between quanta in their laboratories and the net orientation of quanta in the Earth’s mantle, but it was inferred that if the interactions existed they would be as much as a million times weaker than the gravitational interaction between particles.

Print Friendly
Tags: , , Posted by

Leave a Reply