View source for Reciprocative friction in gem-gum technology

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One may also want to call this more fancily '''"reciprocative energy dissipation"'''. <br>
This applies to any reciprocative motion both linear reciprocative and rotative reciprocative. <br>
Essence is back and forth motion that requires accelerations and jerk. <br>

Note that: <br>
– in factory style there is much less reciprocative motion than in more general purpose kind of robotics akin to 3D printers. <br>
– at least one more highly relevant thing …

{{wikitodo|Add explanation of physics, math, and reasonable example values (last one hardest).}} <br>
{{wikitodo|How does it scale and how far is that scaling reliable. Within or out of quantized regime and such.}} <br>

= Mechanisms =

== Akhiezer damping ==

=== Physics ===
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=== Symbolic math ===
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=== Qunatitative example numbers ===
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=== Scaling & limits of model ===

Specifics to diamond (compared to metals or doped silicon). <br>
It seems as if the the absence of dense electronic states in undoped diamond should reduce electron-phonon-coupling significantly. If so then by how much? <br>
Having large amplitudes corresponds to many phonons bosonically overlapping in a few closeby modes. <br>
Multi phonon processes may start to matter. 
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== Non recuperated phase shift ==

In some but not all cases this could be partially recuperated.

=== Physics ===
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=== Symbolic math ===
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=== Qunatitative example numbers ===
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=== Scaling & limits of model ===
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== Accidental heatpump ==

=== Physics ===

– Shifting a thick stiff plunger-shaft in a tight thin walled sleeve <br>
the sleeves walls can't wobble around so much anymore and thus <br>
thermal motion degrees of freedom get "squeezed out" and things get hot. <br>
Reversible computing analogy: This basically equates to setting a random bit to a known state (pushed outwards). <br>
Push spacial entropy in the system out into thermal entropy out of the system. <br>

– Pulling a thick stiff plunger-shaft out of the sleeve <br>
thermal motion degrees of freedom get opened up again and <br>
suck in heat from the environment, making things get cold. <br>
Reversible computing analogy: This basically equates to deleting a known bit (pushed outwards) by rando data from thermal noise. <br>
Fill spacial order with entropy into the system tapping it from thermal entropy of the environment. <br>

If the thermal energy gradient is not immediately recuperated  <br>
(nigh impossible due to: high at the nanoscale surface to volume ratio & high heat conductivity of diamond) <br>
that energy is immediately dissipated and made permanently unrecoverable.

Possible counter-strategies: <br>
– stiffer sleeves <br>
– less tight fitting sleeves <br>

=== Symbolic math ===
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=== Qunatitative example numbers ===
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=== Scaling & limits of model ===

It seems this should scale linearly over a very very wide range of speeds. Including proposed ~1mm/s scale.<br>
Nontrivial things might happen near absolute zero where phonon modes freeze out. <br>
Especially for diamond. <br>

= Related =

* [[Friction in gem-gum technology]]
* [[Friction]]
* [[Accidental heatpump]]
* <small>[[Accidentally suggestive]]</small>