Twisted Radio Waves and Twisted Thermodynamics

Kish, Laszlo B.; Nevels, Robert D.
February 2013
PLoS ONE;Feb2013, Vol. 8 Issue 2, p1
Academic Journal
We present and analyze a gedanken experiment and show that the assumption that an antenna operating at a single frequency can transmit more than two independent information channels to the far field violates the Second Law of Thermodynamics. Transmission of a large number of channels, each associated with an angular momenta ‘twisted wave’ mode, to the far field in free space is therefore not possible.


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