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‘Negative mass’ created at Washington State University

Posted: Wed Apr 19, 2017 2:50 pm
by duane
if mass = gravity
does negative-mass = anti-gravity?

if mass is created by "spins"
does un-spinning or stopping spin = un-massing?

https://news.wsu.edu/2017/04/10/negativ ... ed-at-wsu/
‘Negative mass’ created at Washington State University


https://journals.aps.org/prl/abstract/1 ... 118.155301

Negative-Mass Hydrodynamics in a Spin-Orbit–Coupled Bose-Einstein Condensate
A negative effective mass can be realized in quantum systems by engineering the dispersion relation. A powerful method is provided by spin-orbit coupling, which is currently at the center of intense research efforts. Here we measure an expanding spin-orbit coupled Bose-Einstein condensate whose dispersion features a region of negative effective mass. We observe a range of dynamical phenomena, including the breaking of parity and of Galilean covariance, dynamical instabilities, and self-trapping. The experimental findings are reproduced by a single-band Gross-Pitaevskii simulation, demonstrating that the emerging features—shock waves, soliton trains, self-trapping, etc.—originate from a modified dispersion. Our work also sheds new light on related phenomena in optical lattices, where the underlying periodic structure often complicates their interpretation.
I got lost well before "Gross-Pitaevskii "
how does this look from RS view?

Re: ‘Negative mass’ created at Washington State University

Posted: Wed Oct 11, 2017 9:31 am
by MarkPerr
Very interesting. I was not aware of this at all. Can't wait to give it a proper read later on this week.

Re: ‘Negative mass’ created at Washington State University

Posted: Tue Oct 31, 2017 8:39 pm
by bperet
duane wrote: Wed Apr 19, 2017 2:50 pm if mass = gravity
does negative-mass = anti-gravity?
It isn't "negative mass," it is inverse mass--a cosmic atom--because the direction of motion inverts when you cross the unit speed boundary, inward and outward exchange.

Inward in space (in 3D) = gravity.
Inward in time (in 3D) = outward in space (in 3D) = antigravity.

Conventional atoms are outward rotations in time, that appear as rotationally-distributed, inward motion in space: gravity.

Cosmic atoms are outward rotations in space, that appear as rotationally-distributed, inward motions in time. "In" in time = "Out" in space. Cosmic atoms repel each other at progression velocities, which is why you cannot have a stable, cosmic molecule in our conventional environment.