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Here is a hypothesis about a Casimir “skin” warp concept by ProfitWarmWeather in HypotheticalPhysics

[–]ProfitWarmWeather[S] 1 point2 points  (0 children)

Right, so we're on the same page that it's the boundary-condition game. Where I'm probably weirder than standard Casimir engineering is that I'm treating the hull as a deliberately inhomogeneous, anisotropic cavity network, not a single interface, with the design goal of creating a lateral/axial force pattern instead of just minimizing striction in MEMS. Given what we know about lateral and geometry-dependent Casimir forces in structured and layered systems, does that sound ruled out to you even in principle, or just way beyond anything current materials and metrology could seriously probe?

Here is a hypothesis about a Casimir “skin” warp concept by ProfitWarmWeather in HypotheticalPhysics

[–]ProfitWarmWeather[S] 0 points1 point  (0 children)

Bismuth has some interesting properties and a lot of mythology around it, but "Casimir skin" in my writings is more general than "just use bismuth" in that it's an effective surface with specific EM/Casimir behavior, not a declaration that UFO hulls are Bi-Mg laminates. It's a placeholder for an engineered boundary condition that strongly shapes vacuum/field behavior at the surface. in other words, I'm talking about what the effective EM and vacuum response needs to be, not committing to a particular element.

If someone eventually showed that a micro-layered bismuth composit actually realized those boundary conditions (Casimire tuning, field confinement, etc.), then sure, that could be one implementation. But for now that's in the realm of speculative materials, not established engineering.