Physicists isolated and made pairs of ultracold atoms to research the P-wave interaction.

Above this text is an image of the seismic wave travel on Earth. When incoming seismic waves impact two points on the Earth's shell. They cause a situation. where waves travel against each other. That effect forms the standing wave between those points. And all wave movement acts the same way. 

This is the story of the P and S wave interaction in seismology. When Earthquake waves impact the earth's shell that thing causes the S and P waves. S waves are transverse waves. And P waves are longitudinal primary waves. All wave movement is similar. There are also S- and P waves in magnetic fields. The same things that are causing earthquakes are limiting the time of quantum entanglement. 

"Plane P wave" (Wikipedia / Pwave)

"Representation of the propagation of a P wave on a 2D grid (empirical shape)" (Wikipedia / P wave)

Diagram 1 (a and b)shows the movement of P waves. 

"Plane shear wave" Wikipedia /S wave)

"Propagation of a spherical S wave in a 2d grid (empirical model)" (Wikipedia / S wave) Notice: the S wave's  rotational trajectory. 

Diagram 2 ( c and  d) shows the movement of S waves. 

Diagram 3 shows how the impacting wave movement forms the standing wave. The standing wave collects energy until it can press the energy that travels in it back to the direction where it comes. 

Those images are taken from pages that handle seismology. But P and S waves are acting similarly in all systems. When P waves are moving in the system they travel in straight lines. 

S waves are forming when pressure waves impact to shell at one point. That forms a spherically expanding wave. The difference between spherically expanding S- and P waves is that S-waves follow rotational trajectories.  The impacts of S- and P waves are forming a standing wave. 

The P wave is well-known in seismology. They are longitudinal waves. And in quantum systems, is also longitudinal P waves. And S waves are transverse waves. The P-waves are one of the reasons why quantum systems are breaking. '

Or actually, when the electromagnetic waves are scattered from the object that is in the middle of the system. They form impacting S and P waves. Those impacting waves are destroying the quantum entanglements. 

The P waves can use to aim certain parts of nanomachines in the right position. In that case, the system can put the nanomachine behind the particle. And extremely weak P waves can use to accurately the angle of atoms into a certain position. 

By connecting two or three atoms is possible to create the quantum radar. Or quantum scanner. The idea is that those two or three atoms are orbiting the tower of atoms. That thing is similar to a scanning tunneling microscope. But it uses three atoms that act like some extremely small radar antenna. 

https://www.bbc.co.uk/bitesize/guides/z2dtv9q/revision/3

https://scitechdaily.com/a-perfect-little-system-physicists-isolate-a-pair-of-atoms-to-observe-p-wave-interaction-strength-for-the-first-time/

https://en.wikipedia.org/wiki/P_wave

https://en.wikipedia.org/wiki/S_wave

https://shorttextsofoldscholars.blogspot.com/