I think I just thought of something that may help (hinder) your quest
to find out what connects quanta, albeit it a philosophical point
rather than a physical one.

You have two objects.  Two of anything.  Quanta or Sardines.  For them
to communicate or interact there MUST be a medium between them.  We
look at the two objects and see nothing, and say there is nothing
there.  But that is a trick of the mind.

The Universe abhors a vacuum.  And Nothing is the ultimate vacuum.
There is no such thing as Nothing.  Nothingness DOESN'T exist!  It is
the true figment of our imagination.  We think of Existence sometimes
as this great big "Thing" floating on a background of Nothingness. But
it's not.  Existence doesn't end and Non-existence
begins.  Existence goes on forever.  If "Nothing" is not
there....there has to be SOMETHING....even if we can't see it.

The problem with this is is that once you define what it is that is
there, you will have to prove that THAT substance is continuous,
reaching from object to object.  In my rudimentary understanding of
Physics, that is what happened to Atomic Theory when it was replaced
by Quantum Theory.

Another way of looking at it is: Sound Waves don't travel through a
vacuum.  There must be something to wave.

There is a Zen mondo that goes:

Two monks were arguing over a flag.  One monk claimed it was the flag
that was waving.  The  other claimed it was the wind.  The Master came
along, rapped them both with his stick, and said, "You are BOTH
wrong.  It is your mind that waves!"

The medium between the quanta is Mind.  No-Thing.  Spirit.  Whatever
is there will not appear until we observe it. The "object" will not
appear until the Observer shows up! :D

Namaste

Pottsie