Terry Blanton wrote:
Jones Beenewrote:
"Self cooling" is an interesting proposition. It may not be as
exciting as excess heating, but many new uses would be expected to
materialize if it can be engineered efficiently. There is a
certain kind of semantic compatibility between "self-cooling" and
Dirac's "sea of negative energy" which could be no accident.
You're threatening Feynman's Nobel. 🤓
Well, there's a twist here, since Feynman thought the "Principle of
Least Action" was fundamental and in fact wrote his PhD thesis on the
subject. That Principle can be interpreted as supporting a general
concept of "deep cooling" in the Dirac perspective of the vacuum being
an infinite sea of accessible negative energy. The key word being
"accessible."
If nature has provided us with a bottomless heat sink, or free-cold so
to speak, then a lot of time has been wasted by inventors looking for
free-heat. At the other end of the spectrum, Doppler cooling and laser
cooling point to the emerging possibility that a heat sink can be
active, allowing energy to be extracted from "cold"... or at least from
ambient.
