Feeds

Japanese quantum boffins 'may have the key to TELEPORTATION'

Energy-moving experiment 'cheats' quantum theory with startlingly lateral idea

Secure remote control for conventional and virtual desktops

Don't get too excited, the world's not about to get Star Trek-style transporters. However, if a quantum communications theory formulated by three Tohoku University boffins can stand the test of experiment, they could break the distance limitations that currently constrain quantum communications.

At this point, the exercise gets a little mind-bending, even in the abstract of the paper by Masahiro Hotta, Jiro Matsumoto and Go Yusa from Tohoku's Department of Physics: “We prove that introducing squeezed vacuum states with local vacuum regions between the two protocol users overcomes this limitation, allowing energy teleportation over practical distances”.

“Squeezed states” describe a way to cheat quantum theory just a little bit: you reduce the uncertainty of one parameter in the quantum system by increasing the uncertainty of another parameter. Think of (for example) light. Light has two polarisation states – “squeezing” would allow measurements of the horizontal polarisation state to be more accurate, so long as you don't mind more uncertainty within the vertical polarisation state.

One practical example of squeezing was explained to The Register here, where it was being used to improve the sensitivity of a gravity wave observatory.

So, what's this got to do with quantum communication? It boils down to physicists' ability to demonstrate Quantum Energy Teleportation (QET) over a distance, since as the authors write: “despite … experimental proposals for various physical systems, a strong distance limitation has hampered experimental verification”.

Squeezed Quantum States for Teleportation

Squeezing the quantum state to get better measurements of teleportation

The Tokohu paper proposes a QET protocol that uses “a squeezed vacuum state” between two ends of the communication: “The spatial correlation of the quantum fluctuations with zero energy is maintained, even if the distance between the sender and receiver of QET is very large,” they write. ®

Next gen security for virtualised datacentres

More from The Register

next story
Gigantic toothless 'DRAGONS' dominated Earth's early skies
Gummy pterosaurs outlived toothy competitors
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
TRIANGULAR orbits will help Rosetta to get up close with Comet 67P
Probe will be just 10km from Space Duck in October
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
'Leccy racer whacks petrols in Oz race
ELMOFO rakes in two wins in sanctioned race
Astronomers scramble for obs on new comet
Amateur gets fifth confirmed discovery
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Build a business case: developing custom apps
Learn how to maximize the value of custom applications by accelerating and simplifying their development.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
Next gen security for virtualised datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.