Feeds

Boffins propose photon-swapping entanglement experiment on ISS

Spooky in space

Security for virtualized datacentres

Hard on the heels of a Chinese claim to have measured the speed at which entanglement can transfer information, a group led by Austrian Academy of Sciences professor Rupert Ursin proposes testing “spooky action's” speed between Earth and the International Space Station.

The researchers note that the only kit required on the orbital platform would be a photon detector, which they say could be installed on an existing ground-facing Nikon 400mm camera in the ISS's Cupola module.

The “Bell experiment” would involve testing the entanglement of pairs of photons generated on the ground, one of which would be sent to the ISS. Measuring the state of the earth-bound photons should, if they are truly entangled, determine the state of the photon detected in space.

Since the experiment is probabilistic, you need lots of measurements to tell the difference between coincidence and entanglement. Any individual test of two photon's characteristic (for example, measuring their polarisation) might be the result of chance.

However, as the researchers point out, there are times of the year where the ISS makes five or six passes in succession, all with the right orientation to carry out an experiment. For each pass, they propose a 70-second experiment.

“We envision setting up the experiment for a whole week, and therefore having more than enough links to the ISS available”, professor Ursin says in Phys.org.

A successful experiment would demonstrate entanglement at a distance of 500 km, which Ursin says is far further than any Earth-bound entanglement experiment has achieved. The experiment would also help investigate whether gravity has any affect on entanglement between a photon on Earth and on in orbit.

A second experiment, arguably with more immediate practical application, will test quantum key distribution between Earth and the ISS.

The proposals can be seen at IOP Science, here. ®

Security for virtualized datacentres

More from The Register

next story
Boffins who stare at goats: I do believe they’re SHRINKING
Alpine chamois being squashed by global warming
What's that STINK? Rosetta probe shoves nose under comet's tail
Rotten eggs, horse dung and almonds – yuck
Comet Siding Spring revealed as flying molehill
Hiding from this space pimple isn't going to do humanity's reputation any good
Kip Thorne explains how he created the black hole for Interstellar
Movie special effects project spawns academic papers on gravitational lensing
Experts brand LOHAN's squeaky-clean box
Phytosanitary treatment renders Vulture 2 crate fit for export
LONG ARM of the SAUR: Brachially gifted dino bone conundrum solved
Deinocheirus mirificus was a bit of a knuckle dragger
Moment of truth for LOHAN's servos: Our US allies are poised for final test flight
Will Vulture 2 freeze at altitude? Edge Research Lab to find out
prev story

Whitepapers

Why cloud backup?
Combining the latest advancements in disk-based backup with secure, integrated, cloud technologies offer organizations fast and assured recovery of their critical enterprise data.
A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
New hybrid storage solutions
Tackling data challenges through emerging hybrid storage solutions that enable optimum database performance whilst managing costs and increasingly large data stores.