Quantum entanglement makes quantum communication even more secure

But quantum communication typically has a catch. “There cannot be any glitch that is unforeseen,” says quantum physicist Valerio Scarani of the National University of Singapore. For example, he says, imagine that your device is supposed to emit one photon but unknown to you, it emits two photons. Any such flaws would mean that the mathematical proof of security no longer holds up. A hacker could sniff out your secret key, even though the transmission seems secure.

Device-independent quantum key distribution can rule out such flaws. The method builds off of a quantum technique known as a Bell test, which involves measurements of entangled particles. Such tests can prove that quantum mechanics really does have “spooky” properties, namely nonlocality, the idea that measurements of one particle can be correlated with those of a distant particle.

In their study, Bancal and colleagues used entangled, electrically charged strontium atoms separated by about two meters. Measurements of those ions certified that their devices were behaving properly, and the researchersTypically, quantum communication is meant for long-distance dispatches. So Scarani and colleagues studied entangled rubidium atoms 400 meters apart. The setup.

Loophole-free Bell tests are already no easy feat, and these techniques are even more challenging, says physicist Krister Shalm of the National Institute of Standards and Technology in Boulder, Colo. “The requirements for this experiment are so absurdly high that it’s just an impressive achievement to be able to demonstrate some of these capabilities,” says Shalm, who wrote

‘Makes’ —In the present tense, really?!

kenm77 isn't science wonderful

United States Latest News, United States Headlines

Similar News:You can also read news stories similar to this one that we have collected from other news sources.

Blue Bell ranks among ice cream brands with lowest quality ingredientsApparently, not everybody screams for Blue Bell ice cream — the beloved Texas staple has been called out for using low-quality ingredients.
Source: ksatnews - 🏆 442. / 53 Read more »

Bell & Ross BR 05 Artline: Streamlined AppealBringing urban architecture to the wrist, the new BellRossWatches BR05 Artline is a study in architectural inspiration and pays homage to the world of aviation.
Source: Luxuo - 🏆 571. / 51 Read more »

Taco Bell Employee Allegedly Throws Boiling Hot Water at CustomersA Taco Bell manager poured scalding water on two customers who complained that the restaurant got their order wrong, sending them to the hospital with serious burns, this according to a recently filed lawsuit.
Source: TMZ - 🏆 379. / 59 Read more »

Lake Bell spends time with Chris Rock’s daughters after MSG showThe couple, as well as Dave Chappelle, made their way to Catch Steak following Rock’s stand-up show at Madison Square Garden Saturday night.
Source: PageSix - 🏆 320. / 59 Read more »

Adrian Peterson–Le’Veon Bell Boxing Match PostponedAn exhibition boxing match between former NFL All-Pro running backs Adrian Peterson and Le’Veon Ball has been called off
Source: SInow - 🏆 273. / 63 Read more »

Taco Bell customers sue, claim manager poured boiling water on them in dispute over wrong orderA woman claims that she and a young girl who went to a Taco Bell in Dallas, Texas, were left feeling like they were 'burning from the inside out' after a store manager allegedly covered them in boiling water. ALL Dallas and area tacobell have horrible management and employees. I had to file a complaint recently on ANOTHER one of their stellar managers and Corp did nothing but send a food coupon. It's like they encourage customer abuse.
Source: FOX26Houston - 🏆 448. / 53 Read more »