Atom Cloaking

Beyond the boundaries of established science an avalanche of exotic ideas compete for our attention. Experts tell us that these ideas should not be permitted to take up the time of working scientists, and for the most part they are surely correct. But what about the gems in the rubble pile? By what ground-rules might we bring extraordinary new possibilities to light?

Moderators: MGmirkin, bboyer

Atom Cloaking

Unread postby junglelord » Tue Mar 25, 2008 6:11 pm

From Physics News Update webpage.

Number 859 #2, March 25, 2008 by Phil Schewe
Atom Cloaking

A new study shows how a region of space could be rendered invisible to matter waves. In recent years the possibility of optical cloaking has become a hot topic (e.g., Science, 8 Sept 2006). Even cloaking with sound waves has been proposed ( Now physicists in Professor Xiang Zhang’s group at the University of California, Berkeley, are trying to extend the cloaking idea to atom waves (chilled atoms whose quantum wavelike properties are more important than their particle-like properties) moving through a medium.

The “medium” in question here is a concentric optical lattice, generated by standing electromagnetic waves with spatially controlled amplitudes and phases. Cloaking of an object bathed in light works by modulating the effective mass and potential of atom waves traversing the shell surrounding the object. The shell is analogous to the metamaterials (tailored materials often consisting of arrays of tiny rods and ring-shaped metal structures) used in the optical case.

One of the Berkeley researchers, Shuang Zhang (, says that the atom-wave equivalent of an index of refraction would be the modulation of the effective atomic mass inside the optical lattice (see figure at Zhang says that apart from cloaking, the creation of a metamaterial for atom waves might also help in focusing atom waves into tiny spot (super-lensing) or for steering particle beams at will. (Zhang et al., Physical Review Letters, 28 march 2008)
If you only knew the magnificence of the 3, 6 and 9, then you would have a key to the universe.
— Nikola Tesla
Casting Out the Nines from PHI into Indigs reveals the Cosmic Harmonic Code.
— Junglelord.
Knowledge is Structured in Consciouness. Structure and Function Cannot Be Seperated.
— Junglelord
User avatar
Posts: 3693
Joined: Mon Mar 17, 2008 5:39 am
Location: Canada

Return to New Insights and Mad Ideas

Who is online

Users browsing this forum: No registered users and 6 guests