If an inertial "observer" or state has mass and no rotation, then a massless state with rotation (i.e. having maybe a generalized rotation such as "spin," e.g. a photon) seems to be dual to that state.(adsbygoogle = window.adsbygoogle || []).push({});

Would this viewpoint then take the photon as a "matching" channel or "process" for communication among inertial observers? This seems something like Lie algebra mapping to operator; like a gauge boson. If not a photon, perhaps a graviton. I am not well accustomed to the intricacies of group theory, but I mention it in an effort to be constructive and prompt discussion.

In communications and transmission line theory, for the optimum exchange of energy the channel must be "matched" to the source and receiver. This is why I stretched a bit to think of the dual of the inertial observer, representing a mapping between two observers.

References which might help clarify the point:

(Link to the Physics Forums definition of "inertial observer")

https://www.physicsforums.com/library.php?do=view_item&itemid=35

(Link to mappings of Lie algebras, Chapter 6)

http://www.physics.drexel.edu/~bob/LieGroups.html

(The inevitable Wikipedia link)

http://en.wikipedia.org/wiki/Gauge_boson

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# Dual of the inertial observer

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