Complete waste of money
From Wired mag:(1) Scientists funded by the Pentagon are developing ways to hide devices and soldiers by bending light.
(2) Scientists funded by the Pentagon are developing ways to hide events by delaying the transmission of electrical or light waves. So far they've managed a delay of a few picoseconds, which won't even hide one digital bit in a Web stream.
Both are a complete waste of money. Totally silly use of Big Science to do things that have been done for thousands of years in cheaper and more effective ways.
Disproof: Sheikh Osama didn't need sheets of carbon nanotubes to weaponize airliners. He didn't need to use quantum methods to defeat our trillion-dollar completely useless NORAD, nor to conceal the hijacking from air traffic control.
He simply took advantage of our suicidal adherence to
Die-Versity, which has made us completely blind to criminal and warlike acts when committed by
Persons Of Colour or
Persons Of Gender.
Disproof in the other direction: Stuxnet. US and Israeli intelligence didn't need to use light-benders or quantum time-shifters to sabotage the Persian nuclear program. They simply took advantage of blind spots in the software and security of the facilities. The virus was apparently brought into the system by an innocent-looking CD or USB thumbdrive.
Spycraft or deception is as old as the Trojan Horse and as new as Stuxnet, and it's vastly cheaper and more reliable than brute-force stealth technology. (Actually it's a billion years older than the Trojan Horse, if you look at nature's cornucopia of
deceptive colors, behaviors, sounds, smells, and
shapes.)