[FoRK] Inertial Mass != Gravitational Mass?

Harish Singh senqua at googlemail.com
Sat Jun 19 00:04:41 PDT 2010

No monkeys zipping around the cosmos yet. Yet, researchers, John
Singleton and Andrea Schmidt of Los Alamos and their colleagues, have
built a sort of wire in which an electric pulse can outpace light.

Singleton says the basic principle of FTL currents goes back to work
by English physicist Oliver Heaviside and German physicist Arnold
Sommerfeldt in the 1890s, but was forgotten because Einstein's
theories dissuaded physicists from thinking about FTL phenomena, even
those that evaded the theories' strictures. I've only just touched on
this engrossing physics and I recommend you read the team's papers,
beginning with this one. "People just don't think about things moving
faster than the speed of light," Singleton says. "This is a completely
wide open and unexplored field."

Fascinating stuff.



- Harish

Fascinating stuff.

On Tue, Jun 15, 2010 at 9:00 PM, Jeff Bone <jbone at place.org> wrote:
> On Jun 14, 2010, at 11:31 PM, Stephen Williams wrote:
>> Scotty!  Just tell me if you can build the anti-grav stabilizer and interplanetary star drive or not!  Those Klingons will be here any minute!
>> Well Captain, any difference in gravitational gradients is theoretically exploitable to create an inertial damped propulsion system, but the fourth-dimensional torsional shearing will likely create tachyon bursts that will fry your brain.
>> I'm sure Bones has something for that, just do it!
> BTW, before we get all geek-jizzy about the sci-fi possibilities of the conjecture, it's worth pointing out:  it probably means a *further* set of restrictions that limit what's achievable in terms of this sort of thing.  No "anti-gravity" per se.  No FTL per se implied (though perhaps it implies varying c, apropos your Vinge reference, though probably not with his speculated consequences.)  No magic bullets.  Abundant ambient and usable energy (later post, asymmetric Casimir effect generated by asymmetric fractal meta-materials, turning an engineered vacuum energy-density imbalance into kinetic energy, mentioned here over a decade ago in sketchy detail) but further limitations on propulsion;  in particular, as mentioned, it probably limits any locally-accelerated matter from getting past an asymptotic limit of "about" 2/3c.
> Sorry, Stephen.  Still no monkeys in pressurized tin cans zipping around the cosmos at warp speed.
> jb
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